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-rw-r--r--mm/filemap.c71
-rw-r--r--mm/filemap_xip.c4
-rw-r--r--mm/fremap.c4
-rw-r--r--mm/huge_memory.c25
-rw-r--r--mm/hugetlb.c16
-rw-r--r--mm/init-mm.c1
-rw-r--r--mm/internal.h4
-rw-r--r--mm/kmemleak.c7
-rw-r--r--mm/ksm.c7
-rw-r--r--mm/memcontrol.c13
-rw-r--r--mm/memory-failure.c21
-rw-r--r--mm/memory.c440
-rw-r--r--mm/memory_hotplug.c21
-rw-r--r--mm/mempolicy.c164
-rw-r--r--mm/migrate.c17
-rw-r--r--mm/mmap.c121
-rw-r--r--mm/mremap.c5
-rw-r--r--mm/nobootmem.c23
-rw-r--r--mm/nommu.c108
-rw-r--r--mm/oom_kill.c36
-rw-r--r--mm/page_alloc.c124
-rw-r--r--mm/percpu.c6
-rw-r--r--mm/prio_tree.c1
-rw-r--r--mm/readahead.c2
-rw-r--r--mm/rmap.c183
-rw-r--r--mm/shmem.c323
-rw-r--r--mm/slab.c1
-rw-r--r--mm/slub.c168
-rw-r--r--mm/swap.c52
-rw-r--r--mm/swapfile.c6
-rw-r--r--mm/util.c24
-rw-r--r--mm/vmalloc.c15
-rw-r--r--mm/vmscan.c81
-rw-r--r--mm/vmstat.c264
34 files changed, 1332 insertions, 1026 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index c641edf553a9..68e782b3d3de 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -58,16 +58,16 @@
/*
* Lock ordering:
*
- * ->i_mmap_lock (truncate_pagecache)
+ * ->i_mmap_mutex (truncate_pagecache)
* ->private_lock (__free_pte->__set_page_dirty_buffers)
* ->swap_lock (exclusive_swap_page, others)
* ->mapping->tree_lock
*
* ->i_mutex
- * ->i_mmap_lock (truncate->unmap_mapping_range)
+ * ->i_mmap_mutex (truncate->unmap_mapping_range)
*
* ->mmap_sem
- * ->i_mmap_lock
+ * ->i_mmap_mutex
* ->page_table_lock or pte_lock (various, mainly in memory.c)
* ->mapping->tree_lock (arch-dependent flush_dcache_mmap_lock)
*
@@ -84,7 +84,7 @@
* sb_lock (fs/fs-writeback.c)
* ->mapping->tree_lock (__sync_single_inode)
*
- * ->i_mmap_lock
+ * ->i_mmap_mutex
* ->anon_vma.lock (vma_adjust)
*
* ->anon_vma.lock
@@ -106,7 +106,7 @@
*
* (code doesn't rely on that order, so you could switch it around)
* ->tasklist_lock (memory_failure, collect_procs_ao)
- * ->i_mmap_lock
+ * ->i_mmap_mutex
*/
/*
@@ -562,6 +562,17 @@ void wait_on_page_bit(struct page *page, int bit_nr)
}
EXPORT_SYMBOL(wait_on_page_bit);
+int wait_on_page_bit_killable(struct page *page, int bit_nr)
+{
+ DEFINE_WAIT_BIT(wait, &page->flags, bit_nr);
+
+ if (!test_bit(bit_nr, &page->flags))
+ return 0;
+
+ return __wait_on_bit(page_waitqueue(page), &wait,
+ sleep_on_page_killable, TASK_KILLABLE);
+}
+
/**
* add_page_wait_queue - Add an arbitrary waiter to a page's wait queue
* @page: Page defining the wait queue of interest
@@ -643,15 +654,32 @@ EXPORT_SYMBOL_GPL(__lock_page_killable);
int __lock_page_or_retry(struct page *page, struct mm_struct *mm,
unsigned int flags)
{
- if (!(flags & FAULT_FLAG_ALLOW_RETRY)) {
- __lock_page(page);
- return 1;
- } else {
- if (!(flags & FAULT_FLAG_RETRY_NOWAIT)) {
- up_read(&mm->mmap_sem);
+ if (flags & FAULT_FLAG_ALLOW_RETRY) {
+ /*
+ * CAUTION! In this case, mmap_sem is not released
+ * even though return 0.
+ */
+ if (flags & FAULT_FLAG_RETRY_NOWAIT)
+ return 0;
+
+ up_read(&mm->mmap_sem);
+ if (flags & FAULT_FLAG_KILLABLE)
+ wait_on_page_locked_killable(page);
+ else
wait_on_page_locked(page);
- }
return 0;
+ } else {
+ if (flags & FAULT_FLAG_KILLABLE) {
+ int ret;
+
+ ret = __lock_page_killable(page);
+ if (ret) {
+ up_read(&mm->mmap_sem);
+ return 0;
+ }
+ } else
+ __lock_page(page);
+ return 1;
}
}
@@ -1528,15 +1556,17 @@ static void do_sync_mmap_readahead(struct vm_area_struct *vma,
/* If we don't want any read-ahead, don't bother */
if (VM_RandomReadHint(vma))
return;
+ if (!ra->ra_pages)
+ return;
- if (VM_SequentialReadHint(vma) ||
- offset - 1 == (ra->prev_pos >> PAGE_CACHE_SHIFT)) {
+ if (VM_SequentialReadHint(vma)) {
page_cache_sync_readahead(mapping, ra, file, offset,
ra->ra_pages);
return;
}
- if (ra->mmap_miss < INT_MAX)
+ /* Avoid banging the cache line if not needed */
+ if (ra->mmap_miss < MMAP_LOTSAMISS * 10)
ra->mmap_miss++;
/*
@@ -1550,12 +1580,10 @@ static void do_sync_mmap_readahead(struct vm_area_struct *vma,
* mmap read-around
*/
ra_pages = max_sane_readahead(ra->ra_pages);
- if (ra_pages) {
- ra->start = max_t(long, 0, offset - ra_pages/2);
- ra->size = ra_pages;
- ra->async_size = 0;
- ra_submit(ra, mapping, file);
- }
+ ra->start = max_t(long, 0, offset - ra_pages / 2);
+ ra->size = ra_pages;
+ ra->async_size = ra_pages / 4;
+ ra_submit(ra, mapping, file);
}
/*
@@ -1660,7 +1688,6 @@ retry_find:
return VM_FAULT_SIGBUS;
}
- ra->prev_pos = (loff_t)offset << PAGE_CACHE_SHIFT;
vmf->page = page;
return ret | VM_FAULT_LOCKED;
diff --git a/mm/filemap_xip.c b/mm/filemap_xip.c
index 83364df74a33..93356cd12828 100644
--- a/mm/filemap_xip.c
+++ b/mm/filemap_xip.c
@@ -183,7 +183,7 @@ __xip_unmap (struct address_space * mapping,
return;
retry:
- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_mutex);
vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) {
mm = vma->vm_mm;
address = vma->vm_start +
@@ -201,7 +201,7 @@ retry:
page_cache_release(page);
}
}
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_mutex);
if (locked) {
mutex_unlock(&xip_sparse_mutex);
diff --git a/mm/fremap.c b/mm/fremap.c
index ec520c7b28df..7f4123056e06 100644
--- a/mm/fremap.c
+++ b/mm/fremap.c
@@ -211,13 +211,13 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
}
goto out;
}
- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_mutex);
flush_dcache_mmap_lock(mapping);
vma->vm_flags |= VM_NONLINEAR;
vma_prio_tree_remove(vma, &mapping->i_mmap);
vma_nonlinear_insert(vma, &mapping->i_mmap_nonlinear);
flush_dcache_mmap_unlock(mapping);
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_mutex);
}
if (vma->vm_flags & VM_LOCKED) {
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 83326ad66d9b..615d9743a3cb 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1139,7 +1139,7 @@ static int __split_huge_page_splitting(struct page *page,
* We can't temporarily set the pmd to null in order
* to split it, the pmd must remain marked huge at all
* times or the VM won't take the pmd_trans_huge paths
- * and it won't wait on the anon_vma->root->lock to
+ * and it won't wait on the anon_vma->root->mutex to
* serialize against split_huge_page*.
*/
pmdp_splitting_flush_notify(vma, address, pmd);
@@ -1333,7 +1333,7 @@ static int __split_huge_page_map(struct page *page,
return ret;
}
-/* must be called with anon_vma->root->lock hold */
+/* must be called with anon_vma->root->mutex hold */
static void __split_huge_page(struct page *page,
struct anon_vma *anon_vma)
{
@@ -1771,12 +1771,9 @@ static void collapse_huge_page(struct mm_struct *mm,
VM_BUG_ON(address & ~HPAGE_PMD_MASK);
#ifndef CONFIG_NUMA
+ up_read(&mm->mmap_sem);
VM_BUG_ON(!*hpage);
new_page = *hpage;
- if (unlikely(mem_cgroup_newpage_charge(new_page, mm, GFP_KERNEL))) {
- up_read(&mm->mmap_sem);
- return;
- }
#else
VM_BUG_ON(*hpage);
/*
@@ -1791,22 +1788,26 @@ static void collapse_huge_page(struct mm_struct *mm,
*/
new_page = alloc_hugepage_vma(khugepaged_defrag(), vma, address,
node, __GFP_OTHER_NODE);
+
+ /*
+ * After allocating the hugepage, release the mmap_sem read lock in
+ * preparation for taking it in write mode.
+ */
+ up_read(&mm->mmap_sem);
if (unlikely(!new_page)) {
- up_read(&mm->mmap_sem);
count_vm_event(THP_COLLAPSE_ALLOC_FAILED);
*hpage = ERR_PTR(-ENOMEM);
return;
}
+#endif
+
count_vm_event(THP_COLLAPSE_ALLOC);
if (unlikely(mem_cgroup_newpage_charge(new_page, mm, GFP_KERNEL))) {
- up_read(&mm->mmap_sem);
+#ifdef CONFIG_NUMA
put_page(new_page);
+#endif
return;
}
-#endif
-
- /* after allocating the hugepage upgrade to mmap_sem write mode */
- up_read(&mm->mmap_sem);
/*
* Prevent all access to pagetables with the exception of
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 8ee3bd8ec5b5..5fd68b95c671 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -475,7 +475,7 @@ static struct page *dequeue_huge_page_vma(struct hstate *h,
/* If reserves cannot be used, ensure enough pages are in the pool */
if (avoid_reserve && h->free_huge_pages - h->resv_huge_pages == 0)
- goto err;;
+ goto err;
for_each_zone_zonelist_nodemask(zone, z, zonelist,
MAX_NR_ZONES - 1, nodemask) {
@@ -2205,7 +2205,7 @@ void __unmap_hugepage_range(struct vm_area_struct *vma, unsigned long start,
unsigned long sz = huge_page_size(h);
/*
- * A page gathering list, protected by per file i_mmap_lock. The
+ * A page gathering list, protected by per file i_mmap_mutex. The
* lock is used to avoid list corruption from multiple unmapping
* of the same page since we are using page->lru.
*/
@@ -2274,9 +2274,9 @@ void __unmap_hugepage_range(struct vm_area_struct *vma, unsigned long start,
void unmap_hugepage_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end, struct page *ref_page)
{
- spin_lock(&vma->vm_file->f_mapping->i_mmap_lock);
+ mutex_lock(&vma->vm_file->f_mapping->i_mmap_mutex);
__unmap_hugepage_range(vma, start, end, ref_page);
- spin_unlock(&vma->vm_file->f_mapping->i_mmap_lock);
+ mutex_unlock(&vma->vm_file->f_mapping->i_mmap_mutex);
}
/*
@@ -2308,7 +2308,7 @@ static int unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma,
* this mapping should be shared between all the VMAs,
* __unmap_hugepage_range() is called as the lock is already held
*/
- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_mutex);
vma_prio_tree_foreach(iter_vma, &iter, &mapping->i_mmap, pgoff, pgoff) {
/* Do not unmap the current VMA */
if (iter_vma == vma)
@@ -2326,7 +2326,7 @@ static int unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma,
address, address + huge_page_size(h),
page);
}
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_mutex);
return 1;
}
@@ -2810,7 +2810,7 @@ void hugetlb_change_protection(struct vm_area_struct *vma,
BUG_ON(address >= end);
flush_cache_range(vma, address, end);
- spin_lock(&vma->vm_file->f_mapping->i_mmap_lock);
+ mutex_lock(&vma->vm_file->f_mapping->i_mmap_mutex);
spin_lock(&mm->page_table_lock);
for (; address < end; address += huge_page_size(h)) {
ptep = huge_pte_offset(mm, address);
@@ -2825,7 +2825,7 @@ void hugetlb_change_protection(struct vm_area_struct *vma,
}
}
spin_unlock(&mm->page_table_lock);
- spin_unlock(&vma->vm_file->f_mapping->i_mmap_lock);
+ mutex_unlock(&vma->vm_file->f_mapping->i_mmap_mutex);
flush_tlb_range(vma, start, end);
}
diff --git a/mm/init-mm.c b/mm/init-mm.c
index 1d29cdfe8ebb..4019979b2637 100644
--- a/mm/init-mm.c
+++ b/mm/init-mm.c
@@ -21,6 +21,5 @@ struct mm_struct init_mm = {
.mmap_sem = __RWSEM_INITIALIZER(init_mm.mmap_sem),
.page_table_lock = __SPIN_LOCK_UNLOCKED(init_mm.page_table_lock),
.mmlist = LIST_HEAD_INIT(init_mm.mmlist),
- .cpu_vm_mask = CPU_MASK_ALL,
INIT_MM_CONTEXT(init_mm)
};
diff --git a/mm/internal.h b/mm/internal.h
index 9d0ced8e505e..d071d380fb49 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -66,6 +66,10 @@ static inline unsigned long page_order(struct page *page)
return page_private(page);
}
+/* mm/util.c */
+void __vma_link_list(struct mm_struct *mm, struct vm_area_struct *vma,
+ struct vm_area_struct *prev, struct rb_node *rb_parent);
+
#ifdef CONFIG_MMU
extern long mlock_vma_pages_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end);
diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index c1d5867543e4..aacee45616fc 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -1414,9 +1414,12 @@ static void *kmemleak_seq_next(struct seq_file *seq, void *v, loff_t *pos)
++(*pos);
list_for_each_continue_rcu(n, &object_list) {
- next_obj = list_entry(n, struct kmemleak_object, object_list);
- if (get_object(next_obj))
+ struct kmemleak_object *obj =
+ list_entry(n, struct kmemleak_object, object_list);
+ if (get_object(obj)) {
+ next_obj = obj;
break;
+ }
}
put_object(prev_obj);
diff --git a/mm/ksm.c b/mm/ksm.c
index 942dfc73a2ff..d708b3ef2260 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -35,6 +35,7 @@
#include <linux/ksm.h>
#include <linux/hash.h>
#include <linux/freezer.h>
+#include <linux/oom.h>
#include <asm/tlbflush.h>
#include "internal.h"
@@ -1894,9 +1895,11 @@ static ssize_t run_store(struct kobject *kobj, struct kobj_attribute *attr,
if (ksm_run != flags) {
ksm_run = flags;
if (flags & KSM_RUN_UNMERGE) {
- current->flags |= PF_OOM_ORIGIN;
+ int oom_score_adj;
+
+ oom_score_adj = test_set_oom_score_adj(OOM_SCORE_ADJ_MAX);
err = unmerge_and_remove_all_rmap_items();
- current->flags &= ~PF_OOM_ORIGIN;
+ test_set_oom_score_adj(oom_score_adj);
if (err) {
ksm_run = KSM_RUN_STOP;
count = err;
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 010f9166fa6e..d5fd3dcd3f2e 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5169,19 +5169,12 @@ struct cgroup_subsys mem_cgroup_subsys = {
static int __init enable_swap_account(char *s)
{
/* consider enabled if no parameter or 1 is given */
- if (!(*s) || !strcmp(s, "=1"))
+ if (!strcmp(s, "1"))
really_do_swap_account = 1;
- else if (!strcmp(s, "=0"))
+ else if (!strcmp(s, "0"))
really_do_swap_account = 0;
return 1;
}
-__setup("swapaccount", enable_swap_account);
+__setup("swapaccount=", enable_swap_account);
-static int __init disable_swap_account(char *s)
-{
- printk_once("noswapaccount is deprecated and will be removed in 2.6.40. Use swapaccount=0 instead\n");
- enable_swap_account("=0");
- return 1;
-}
-__setup("noswapaccount", disable_swap_account);
#endif
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 2b9a5eef39e0..5c8f7e08928d 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -239,7 +239,11 @@ void shake_page(struct page *p, int access)
if (access) {
int nr;
do {
- nr = shrink_slab(1000, GFP_KERNEL, 1000);
+ struct shrink_control shrink = {
+ .gfp_mask = GFP_KERNEL,
+ };
+
+ nr = shrink_slab(&shrink, 1000, 1000);
if (page_count(p) == 1)
break;
} while (nr > 10);
@@ -429,7 +433,7 @@ static void collect_procs_file(struct page *page, struct list_head *to_kill,
*/
read_lock(&tasklist_lock);
- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_mutex);
for_each_process(tsk) {
pgoff_t pgoff = page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT);
@@ -449,7 +453,7 @@ static void collect_procs_file(struct page *page, struct list_head *to_kill,
add_to_kill(tsk, page, vma, to_kill, tkc);
}
}
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_mutex);
read_unlock(&tasklist_lock);
}
@@ -1440,16 +1444,12 @@ int soft_offline_page(struct page *page, int flags)
*/
ret = invalidate_inode_page(page);
unlock_page(page);
-
/*
- * Drop count because page migration doesn't like raised
- * counts. The page could get re-allocated, but if it becomes
- * LRU the isolation will just fail.
* RED-PEN would be better to keep it isolated here, but we
* would need to fix isolation locking first.
*/
- put_page(page);
if (ret == 1) {
+ put_page(page);
ret = 0;
pr_info("soft_offline: %#lx: invalidated\n", pfn);
goto done;
@@ -1461,6 +1461,11 @@ int soft_offline_page(struct page *page, int flags)
* handles a large number of cases for us.
*/
ret = isolate_lru_page(page);
+ /*
+ * Drop page reference which is came from get_any_page()
+ * successful isolate_lru_page() already took another one.
+ */
+ put_page(page);
if (!ret) {
LIST_HEAD(pagelist);
diff --git a/mm/memory.c b/mm/memory.c
index 61e66f026563..b73f677f0bb1 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -182,7 +182,7 @@ void sync_mm_rss(struct task_struct *task, struct mm_struct *mm)
{
__sync_task_rss_stat(task, mm);
}
-#else
+#else /* SPLIT_RSS_COUNTING */
#define inc_mm_counter_fast(mm, member) inc_mm_counter(mm, member)
#define dec_mm_counter_fast(mm, member) dec_mm_counter(mm, member)
@@ -191,8 +191,205 @@ static void check_sync_rss_stat(struct task_struct *task)
{
}
+#endif /* SPLIT_RSS_COUNTING */
+
+#ifdef HAVE_GENERIC_MMU_GATHER
+
+static int tlb_next_batch(struct mmu_gather *tlb)
+{
+ struct mmu_gather_batch *batch;
+
+ batch = tlb->active;
+ if (batch->next) {
+ tlb->active = batch->next;
+ return 1;
+ }
+
+ batch = (void *)__get_free_pages(GFP_NOWAIT | __GFP_NOWARN, 0);
+ if (!batch)
+ return 0;
+
+ batch->next = NULL;
+ batch->nr = 0;
+ batch->max = MAX_GATHER_BATCH;
+
+ tlb->active->next = batch;
+ tlb->active = batch;
+
+ return 1;
+}
+
+/* tlb_gather_mmu
+ * Called to initialize an (on-stack) mmu_gather structure for page-table
+ * tear-down from @mm. The @fullmm argument is used when @mm is without
+ * users and we're going to destroy the full address space (exit/execve).
+ */
+void tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm, bool fullmm)
+{
+ tlb->mm = mm;
+
+ tlb->fullmm = fullmm;
+ tlb->need_flush = 0;
+ tlb->fast_mode = (num_possible_cpus() == 1);
+ tlb->local.next = NULL;
+ tlb->local.nr = 0;
+ tlb->local.max = ARRAY_SIZE(tlb->__pages);
+ tlb->active = &tlb->local;
+
+#ifdef CONFIG_HAVE_RCU_TABLE_FREE
+ tlb->batch = NULL;
+#endif
+}
+
+void tlb_flush_mmu(struct mmu_gather *tlb)
+{
+ struct mmu_gather_batch *batch;
+
+ if (!tlb->need_flush)
+ return;
+ tlb->need_flush = 0;
+ tlb_flush(tlb);
+#ifdef CONFIG_HAVE_RCU_TABLE_FREE
+ tlb_table_flush(tlb);
#endif
+ if (tlb_fast_mode(tlb))
+ return;
+
+ for (batch = &tlb->local; batch; batch = batch->next) {
+ free_pages_and_swap_cache(batch->pages, batch->nr);
+ batch->nr = 0;
+ }
+ tlb->active = &tlb->local;
+}
+
+/* tlb_finish_mmu
+ * Called at the end of the shootdown operation to free up any resources
+ * that were required.
+ */
+void tlb_finish_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long end)
+{
+ struct mmu_gather_batch *batch, *next;
+
+ tlb_flush_mmu(tlb);
+
+ /* keep the page table cache within bounds */
+ check_pgt_cache();
+
+ for (batch = tlb->local.next; batch; batch = next) {
+ next = batch->next;
+ free_pages((unsigned long)batch, 0);
+ }
+ tlb->local.next = NULL;
+}
+
+/* __tlb_remove_page
+ * Must perform the equivalent to __free_pte(pte_get_and_clear(ptep)), while
+ * handling the additional races in SMP caused by other CPUs caching valid
+ * mappings in their TLBs. Returns the number of free page slots left.
+ * When out of page slots we must call tlb_flush_mmu().
+ */
+int __tlb_remove_page(struct mmu_gather *tlb, struct page *page)
+{
+ struct mmu_gather_batch *batch;
+
+ tlb->need_flush = 1;
+
+ if (tlb_fast_mode(tlb)) {
+ free_page_and_swap_cache(page);
+ return 1; /* avoid calling tlb_flush_mmu() */
+ }
+
+ batch = tlb->active;
+ batch->pages[batch->nr++] = page;
+ if (batch->nr == batch->max) {
+ if (!tlb_next_batch(tlb))
+ return 0;
+ }
+ VM_BUG_ON(batch->nr > batch->max);
+
+ return batch->max - batch->nr;
+}
+
+#endif /* HAVE_GENERIC_MMU_GATHER */
+
+#ifdef CONFIG_HAVE_RCU_TABLE_FREE
+
+/*
+ * See the comment near struct mmu_table_batch.
+ */
+
+static void tlb_remove_table_smp_sync(void *arg)
+{
+ /* Simply deliver the interrupt */
+}
+
+static void tlb_remove_table_one(void *table)
+{
+ /*
+ * This isn't an RCU grace period and hence the page-tables cannot be
+ * assumed to be actually RCU-freed.
+ *
+ * It is however sufficient for software page-table walkers that rely on
+ * IRQ disabling. See the comment near struct mmu_table_batch.
+ */
+ smp_call_function(tlb_remove_table_smp_sync, NULL, 1);
+ __tlb_remove_table(table);
+}
+
+static void tlb_remove_table_rcu(struct rcu_head *head)
+{
+ struct mmu_table_batch *batch;
+ int i;
+
+ batch = container_of(head, struct mmu_table_batch, rcu);
+
+ for (i = 0; i < batch->nr; i++)
+ __tlb_remove_table(batch->tables[i]);
+
+ free_page((unsigned long)batch);
+}
+
+void tlb_table_flush(struct mmu_gather *tlb)
+{
+ struct mmu_table_batch **batch = &tlb->batch;
+
+ if (*batch) {
+ call_rcu_sched(&(*batch)->rcu, tlb_remove_table_rcu);
+ *batch = NULL;
+ }
+}
+
+void tlb_remove_table(struct mmu_gather *tlb, void *table)
+{
+ struct mmu_table_batch **batch = &tlb->batch;
+
+ tlb->need_flush = 1;
+
+ /*
+ * When there's less then two users of this mm there cannot be a
+ * concurrent page-table walk.
+ */
+ if (atomic_read(&tlb->mm->mm_users) < 2) {
+ __tlb_remove_table(table);
+ return;
+ }
+
+ if (*batch == NULL) {
+ *batch = (struct mmu_table_batch *)__get_free_page(GFP_NOWAIT | __GFP_NOWARN);
+ if (*batch == NULL) {
+ tlb_remove_table_one(table);
+ return;
+ }
+ (*batch)->nr = 0;
+ }
+ (*batch)->tables[(*batch)->nr++] = table;
+ if ((*batch)->nr == MAX_TABLE_BATCH)
+ tlb_table_flush(tlb);
+}
+
+#endif /* CONFIG_HAVE_RCU_TABLE_FREE */
+
/*
* If a p?d_bad entry is found while walking page tables, report
* the error, before resetting entry to p?d_none. Usually (but
@@ -909,26 +1106,24 @@ int copy_page_range(struct mm_struct *dst_mm, struct mm_struct *src_mm,
static unsigned long zap_pte_range(struct mmu_gather *tlb,
struct vm_area_struct *vma, pmd_t *pmd,
unsigned long addr, unsigned long end,
- long *zap_work, struct zap_details *details)
+ struct zap_details *details)
{
struct mm_struct *mm = tlb->mm;
- pte_t *pte;
- spinlock_t *ptl;
+ int force_flush = 0;
int rss[NR_MM_COUNTERS];
+ spinlock_t *ptl;
+ pte_t *pte;
+again:
init_rss_vec(rss);
-
pte = pte_offset_map_lock(mm, pmd, addr, &ptl);
arch_enter_lazy_mmu_mode();
do {
pte_t ptent = *pte;
if (pte_none(ptent)) {
- (*zap_work)--;
continue;
}
- (*zap_work) -= PAGE_SIZE;
-
if (pte_present(ptent)) {
struct page *page;
@@ -974,7 +1169,9 @@ static unsigned long zap_pte_range(struct mmu_gather *tlb,
page_remove_rmap(page);
if (unlikely(page_mapcount(page) < 0))
print_bad_pte(vma, addr, ptent, page);
- tlb_remove_page(tlb, page);
+ force_flush = !__tlb_remove_page(tlb, page);
+ if (force_flush)
+ break;
continue;
}
/*
@@ -995,19 +1192,31 @@ static unsigned long zap_pte_range(struct mmu_gather *tlb,
print_bad_pte(vma, addr, ptent, NULL);
}
pte_clear_not_present_full(mm, addr, pte, tlb->fullmm);
- } while (pte++, addr += PAGE_SIZE, (addr != end && *zap_work > 0));
+ } while (pte++, addr += PAGE_SIZE, addr != end);
add_mm_rss_vec(mm, rss);
arch_leave_lazy_mmu_mode();
pte_unmap_unlock(pte - 1, ptl);
+ /*
+ * mmu_gather ran out of room to batch pages, we break out of
+ * the PTE lock to avoid doing the potential expensive TLB invalidate
+ * and page-free while holding it.
+ */
+ if (force_flush) {
+ force_flush = 0;
+ tlb_flush_mmu(tlb);
+ if (addr != end)
+ goto again;
+ }
+
return addr;
}
static inline unsigned long zap_pmd_range(struct mmu_gather *tlb,
struct vm_area_struct *vma, pud_t *pud,
unsigned long addr, unsigned long end,
- long *zap_work, struct zap_details *details)
+ struct zap_details *details)
{
pmd_t *pmd;
unsigned long next;
@@ -1019,19 +1228,15 @@ static inline unsigned long zap_pmd_range(struct mmu_gather *tlb,
if (next-addr != HPAGE_PMD_SIZE) {
VM_BUG_ON(!rwsem_is_locked(&tlb->mm->mmap_sem));
split_huge_page_pmd(vma->vm_mm, pmd);
- } else if (zap_huge_pmd(tlb, vma, pmd)) {
- (*zap_work)--;
+ } else if (zap_huge_pmd(tlb, vma, pmd))
continue;
- }
/* fall through */
}
- if (pmd_none_or_clear_bad(pmd)) {
- (*zap_work)--;
+ if (pmd_none_or_clear_bad(pmd))
continue;
- }
- next = zap_pte_range(tlb, vma, pmd, addr, next,
- zap_work, details);
- } while (pmd++, addr = next, (addr != end && *zap_work > 0));
+ next = zap_pte_range(tlb, vma, pmd, addr, next, details);
+ cond_resched();
+ } while (pmd++, addr = next, addr != end);
return addr;
}
@@ -1039,7 +1244,7 @@ static inline unsigned long zap_pmd_range(struct mmu_gather *tlb,
static inline unsigned long zap_pud_range(struct mmu_gather *tlb,
struct vm_area_struct *vma, pgd_t *pgd,
unsigned long addr, unsigned long end,
- long *zap_work, struct zap_details *details)
+ struct zap_details *details)
{
pud_t *pud;
unsigned long next;
@@ -1047,13 +1252,10 @@ static inline unsigned long zap_pud_range(struct mmu_gather *tlb,
pud = pud_offset(pgd, addr);
do {
next = pud_addr_end(addr, end);
- if (pud_none_or_clear_bad(pud)) {
- (*zap_work)--;
+ if (pud_none_or_clear_bad(pud))
continue;
- }
- next = zap_pmd_range(tlb, vma, pud, addr, next,
- zap_work, details);
- } while (pud++, addr = next, (addr != end && *zap_work > 0));
+ next = zap_pmd_range(tlb, vma, pud, addr, next, details);
+ } while (pud++, addr = next, addr != end);
return addr;
}
@@ -1061,7 +1263,7 @@ static inline unsigned long zap_pud_range(struct mmu_gather *tlb,
static unsigned long unmap_page_range(struct mmu_gather *tlb,
struct vm_area_struct *vma,
unsigned long addr, unsigned long end,
- long *zap_work, struct zap_details *details)
+ struct zap_details *details)
{
pgd_t *pgd;
unsigned long next;
@@ -1075,13 +1277,10 @@ static unsigned long unmap_page_range(struct mmu_gather *tlb,
pgd = pgd_offset(vma->vm_mm, addr);
do {
next = pgd_addr_end(addr, end);
- if (pgd_none_or_clear_bad(pgd)) {
- (*zap_work)--;
+ if (pgd_none_or_clear_bad(pgd))
continue;
- }
- next = zap_pud_range(tlb, vma, pgd, addr, next,
- zap_work, details);
- } while (pgd++, addr = next, (addr != end && *zap_work > 0));
+ next = zap_pud_range(tlb, vma, pgd, addr, next, details);
+ } while (pgd++, addr = next, addr != end);
tlb_end_vma(tlb, vma);
mem_cgroup_uncharge_end();
@@ -1121,17 +1320,12 @@ static unsigned long unmap_page_range(struct mmu_gather *tlb,
* ensure that any thus-far unmapped pages are flushed before unmap_vmas()
* drops the lock and schedules.
*/
-unsigned long unmap_vmas(struct mmu_gather **tlbp,
+unsigned long unmap_vmas(struct mmu_gather *tlb,
struct vm_area_struct *vma, unsigned long start_addr,
unsigned long end_addr, unsigned long *nr_accounted,
struct zap_details *details)
{
- long zap_work = ZAP_BLOCK_SIZE;
- unsigned long tlb_start = 0; /* For tlb_finish_mmu */
- int tlb_start_valid = 0;
unsigned long start = start_addr;
- spinlock_t *i_mmap_lock = details? details->i_mmap_lock: NULL;
- int fullmm = (*tlbp)->fullmm;
struct mm_struct *mm = vma->vm_mm;
mmu_notifier_invalidate_range_start(mm, start_addr, end_addr);
@@ -1152,11 +1346,6 @@ unsigned long unmap_vmas(struct mmu_gather **tlbp,
untrack_pfn_vma(vma, 0, 0);
while (start != end) {
- if (!tlb_start_valid) {
- tlb_start = start;
- tlb_start_valid = 1;
- }
-
if (unlikely(is_vm_hugetlb_page(vma))) {
/*
* It is undesirable to test vma->vm_file as it
@@ -1169,39 +1358,15 @@ unsigned long unmap_vmas(struct mmu_gather **tlbp,
* Since no pte has actually been setup, it is
* safe to do nothing in this case.
*/
- if (vma->vm_file) {
+ if (vma->vm_file)
unmap_hugepage_range(vma, start, end, NULL);
- zap_work -= (end - start) /
- pages_per_huge_page(hstate_vma(vma));
- }
start = end;
} else
- start = unmap_page_range(*tlbp, vma,
- start, end, &zap_work, details);
-
- if (zap_work > 0) {
- BUG_ON(start != end);
- break;
- }
-
- tlb_finish_mmu(*tlbp, tlb_start, start);
-
- if (need_resched() ||
- (i_mmap_lock && spin_needbreak(i_mmap_lock))) {
- if (i_mmap_lock) {
- *tlbp = NULL;
- goto out;
- }
- cond_resched();
- }
-
- *tlbp = tlb_gather_mmu(vma->vm_mm, fullmm);
- tlb_start_valid = 0;
- zap_work = ZAP_BLOCK_SIZE;
+ start = unmap_page_range(tlb, vma, start, end, details);
}
}
-out:
+
mmu_notifier_invalidate_range_end(mm, start_addr, end_addr);
return start; /* which is now the end (or restart) address */
}
@@ -1217,16 +1382,15 @@ unsigned long zap_page_range(struct vm_area_struct *vma, unsigned long address,
unsigned long size, struct zap_details *details)
{
struct mm_struct *mm = vma->vm_mm;
- struct mmu_gather *tlb;
+ struct mmu_gather tlb;
unsigned long end = address + size;
unsigned long nr_accounted = 0;
lru_add_drain();
- tlb = tlb_gather_mmu(mm, 0);
+ tlb_gather_mmu(&tlb, mm, 0);
update_hiwater_rss(mm);
end = unmap_vmas(&tlb, vma, address, end, &nr_accounted, details);
- if (tlb)
- tlb_finish_mmu(tlb, address, end);
+ tlb_finish_mmu(&tlb, address, end);
return end;
}
@@ -2535,96 +2699,11 @@ unwritable_page:
return ret;
}
-/*
- * Helper functions for unmap_mapping_range().
- *
- * __ Notes on dropping i_mmap_lock to reduce latency while unmapping __
- *
- * We have to restart searching the prio_tree whenever we drop the lock,
- * since the iterator is only valid while the lock is held, and anyway
- * a later vma might be split and reinserted earlier while lock dropped.
- *
- * The list of nonlinear vmas could be handled more efficiently, using
- * a placeholder, but handle it in the same way until a need is shown.
- * It is important to search the prio_tree before nonlinear list: a vma
- * may become nonlinear and be shifted from prio_tree to nonlinear list
- * while the lock is dropped; but never shifted from list to prio_tree.
- *
- * In order to make forward progress despite restarting the search,
- * vm_truncate_count is used to mark a vma as now dealt with, so we can
- * quickly skip it next time around. Since the prio_tree search only
- * shows us those vmas affected by unmapping the range in question, we
- * can't efficiently keep all vmas in step with mapping->truncate_count:
- * so instead reset them all whenever it wraps back to 0 (then go to 1).
- * mapping->truncate_count and vma->vm_truncate_count are protected by
- * i_mmap_lock.
- *
- * In order to make forward progress despite repeatedly restarting some
- * large vma, note the restart_addr from unmap_vmas when it breaks out:
- * and restart from that address when we reach that vma again. It might
- * have been split or merged, shrunk or extended, but never shifted: so
- * restart_addr remains valid so long as it remains in the vma's range.
- * unmap_mapping_range forces truncate_count to leap over page-aligned
- * values so we can save vma's restart_addr in its truncate_count field.
- */
-#define is_restart_addr(truncate_count) (!((truncate_count) & ~PAGE_MASK))
-
-static void reset_vma_truncate_counts(struct address_space *mapping)
-{
- struct vm_area_struct *vma;
- struct prio_tree_iter iter;
-
- vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, 0, ULONG_MAX)
- vma->vm_truncate_count = 0;
- list_for_each_entry(vma, &mapping->i_mmap_nonlinear, shared.vm_set.list)
- vma->vm_truncate_count = 0;
-}
-
-static int unmap_mapping_range_vma(struct vm_area_struct *vma,
+static void unmap_mapping_range_vma(struct vm_area_struct *vma,
unsigned long start_addr, unsigned long end_addr,
struct zap_details *details)
{
- unsigned long restart_addr;
- int need_break;
-
- /*
- * files that support invalidating or truncating portions of the
- * file from under mmaped areas must have their ->fault function
- * return a locked page (and set VM_FAULT_LOCKED in the return).
- * This provides synchronisation against concurrent unmapping here.
- */
-
-again:
- restart_addr = vma->vm_truncate_count;
- if (is_restart_addr(restart_addr) && start_addr < restart_addr) {
- start_addr = restart_addr;
- if (start_addr >= end_addr) {
- /* Top of vma has been split off since last time */
- vma->vm_truncate_count = details->truncate_count;
- return 0;
- }
- }
-
- restart_addr = zap_page_range(vma, start_addr,
- end_addr - start_addr, details);
- need_break = need_resched() || spin_needbreak(details->i_mmap_lock);
-
- if (restart_addr >= end_addr) {
- /* We have now completed this vma: mark it so */
- vma->vm_truncate_count = details->truncate_count;
- if (!need_break)
- return 0;
- } else {
- /* Note restart_addr in vma's truncate_count field */
- vma->vm_truncate_count = restart_addr;
- if (!need_break)
- goto again;
- }
-
- spin_unlock(details->i_mmap_lock);
- cond_resched();
- spin_lock(details->i_mmap_lock);
- return -EINTR;
+ zap_page_range(vma, start_addr, end_addr - start_addr, details);
}
static inline void unmap_mapping_range_tree(struct prio_tree_root *root,
@@ -2634,12 +2713,8 @@ static inline void unmap_mapping_range_tree(struct prio_tree_root *root,
struct prio_tree_iter iter;
pgoff_t vba, vea, zba, zea;
-restart:
vma_prio_tree_foreach(vma, &iter, root,
details->first_index, details->last_index) {
- /* Skip quickly over those we have already dealt with */
- if (vma->vm_truncate_count == details->truncate_count)
- continue;
vba = vma->vm_pgoff;
vea = vba + ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT) - 1;
@@ -2651,11 +2726,10 @@ restart:
if (zea > vea)
zea = vea;
- if (unmap_mapping_range_vma(vma,
+ unmap_mapping_range_vma(vma,
((zba - vba) << PAGE_SHIFT) + vma->vm_start,
((zea - vba + 1) << PAGE_SHIFT) + vma->vm_start,
- details) < 0)
- goto restart;
+ details);
}
}
@@ -2670,15 +2744,9 @@ static inline void unmap_mapping_range_list(struct list_head *head,
* across *all* the pages in each nonlinear VMA, not just the pages
* whose virtual address lies outside the file truncation point.
*/
-restart:
list_for_each_entry(vma, head, shared.vm_set.list) {
- /* Skip quickly over those we have already dealt with */
- if (vma->vm_truncate_count == details->truncate_count)
- continue;
details->nonlinear_vma = vma;
- if (unmap_mapping_range_vma(vma, vma->vm_start,
- vma->vm_end, details) < 0)
- goto restart;
+ unmap_mapping_range_vma(vma, vma->vm_start, vma->vm_end, details);
}
}
@@ -2717,26 +2785,14 @@ void unmap_mapping_range(struct address_space *mapping,
details.last_index = hba + hlen - 1;
if (details.last_index < details.first_index)
details.last_index = ULONG_MAX;
- details.i_mmap_lock = &mapping->i_mmap_lock;
- mutex_lock(&mapping->unmap_mutex);
- spin_lock(&mapping->i_mmap_lock);
-
- /* Protect against endless unmapping loops */
- mapping->truncate_count++;
- if (unlikely(is_restart_addr(mapping->truncate_count))) {
- if (mapping->truncate_count == 0)
- reset_vma_truncate_counts(mapping);
- mapping->truncate_count++;
- }
- details.truncate_count = mapping->truncate_count;
+ mutex_lock(&mapping->i_mmap_mutex);
if (unlikely(!prio_tree_empty(&mapping->i_mmap)))
unmap_mapping_range_tree(&mapping->i_mmap, &details);
if (unlikely(!list_empty(&mapping->i_mmap_nonlinear)))
unmap_mapping_range_list(&mapping->i_mmap_nonlinear, &details);
- spin_unlock(&mapping->i_mmap_lock);
- mutex_unlock(&mapping->unmap_mutex);
+ mutex_unlock(&mapping->i_mmap_mutex);
}
EXPORT_SYMBOL(unmap_mapping_range);
@@ -2966,7 +3022,7 @@ static inline int check_stack_guard_page(struct vm_area_struct *vma, unsigned lo
if (prev && prev->vm_end == address)
return prev->vm_flags & VM_GROWSDOWN ? 0 : -ENOMEM;
- expand_stack(vma, address - PAGE_SIZE);
+ expand_downwards(vma, address - PAGE_SIZE);
}
if ((vma->vm_flags & VM_GROWSUP) && address + PAGE_SIZE == vma->vm_end) {
struct vm_area_struct *next = vma->vm_next;
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 9ca1d604f7cd..9f646374e32f 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -374,10 +374,6 @@ void online_page(struct page *page)
totalhigh_pages++;
#endif
-#ifdef CONFIG_FLATMEM
- max_mapnr = max(pfn, max_mapnr);
-#endif
-
ClearPageReserved(page);
init_page_count(page);
__free_page(page);
@@ -400,7 +396,7 @@ static int online_pages_range(unsigned long start_pfn, unsigned long nr_pages,
}
-int online_pages(unsigned long pfn, unsigned long nr_pages)
+int __ref online_pages(unsigned long pfn, unsigned long nr_pages)
{
unsigned long onlined_pages = 0;
struct zone *zone;
@@ -459,8 +455,9 @@ int online_pages(unsigned long pfn, unsigned long nr_pages)
zone_pcp_update(zone);
mutex_unlock(&zonelists_mutex);
- setup_per_zone_wmarks();
- calculate_zone_inactive_ratio(zone);
+
+ init_per_zone_wmark_min();
+
if (onlined_pages) {
kswapd_run(zone_to_nid(zone));
node_set_state(zone_to_nid(zone), N_HIGH_MEMORY);
@@ -705,7 +702,7 @@ do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
if (!pfn_valid(pfn))
continue;
page = pfn_to_page(pfn);
- if (!page_count(page))
+ if (!get_page_unless_zero(page))
continue;
/*
* We can skip free pages. And we can only deal with pages on
@@ -713,6 +710,7 @@ do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
*/
ret = isolate_lru_page(page);
if (!ret) { /* Success */
+ put_page(page);
list_add_tail(&page->lru, &source);
move_pages--;
inc_zone_page_state(page, NR_ISOLATED_ANON +
@@ -724,6 +722,7 @@ do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
pfn);
dump_page(page);
#endif
+ put_page(page);
/* Because we don't have big zone->lock. we should
check this again here. */
if (page_count(page)) {
@@ -795,7 +794,7 @@ check_pages_isolated(unsigned long start_pfn, unsigned long end_pfn)
return offlined;
}
-static int offline_pages(unsigned long start_pfn,
+static int __ref offline_pages(unsigned long start_pfn,
unsigned long end_pfn, unsigned long timeout)
{
unsigned long pfn, nr_pages, expire;
@@ -893,8 +892,8 @@ repeat:
zone->zone_pgdat->node_present_pages -= offlined_pages;
totalram_pages -= offlined_pages;
- setup_per_zone_wmarks();
- calculate_zone_inactive_ratio(zone);
+ init_per_zone_wmark_min();
+
if (!node_present_pages(node)) {
node_clear_state(node, N_HIGH_MEMORY);
kswapd_stop(node);
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 959a8b8c7350..e7fb9d25c54e 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -99,7 +99,6 @@
/* Internal flags */
#define MPOL_MF_DISCONTIG_OK (MPOL_MF_INTERNAL << 0) /* Skip checks for continuous vmas */
#define MPOL_MF_INVERT (MPOL_MF_INTERNAL << 1) /* Invert check for nodemask */
-#define MPOL_MF_STATS (MPOL_MF_INTERNAL << 2) /* Gather statistics */
static struct kmem_cache *policy_cache;
static struct kmem_cache *sn_cache;
@@ -457,7 +456,6 @@ static const struct mempolicy_operations mpol_ops[MPOL_MAX] = {
},
};
-static void gather_stats(struct page *, void *, int pte_dirty);
static void migrate_page_add(struct page *page, struct list_head *pagelist,
unsigned long flags);
@@ -492,9 +490,7 @@ static int check_pte_range(struct vm_area_struct *vma, pmd_t *pmd,
if (node_isset(nid, *nodes) == !!(flags & MPOL_MF_INVERT))
continue;
- if (flags & MPOL_MF_STATS)
- gather_stats(page, private, pte_dirty(*pte));
- else if (flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL))
+ if (flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL))
migrate_page_add(page, private, flags);
else
break;
@@ -1489,7 +1485,7 @@ asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
* freeing by another task. It is the caller's responsibility to free the
* extra reference for shared policies.
*/
-static struct mempolicy *get_vma_policy(struct task_struct *task,
+struct mempolicy *get_vma_policy(struct task_struct *task,
struct vm_area_struct *vma, unsigned long addr)
{
struct mempolicy *pol = task->mempolicy;
@@ -2529,159 +2525,3 @@ int mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol, int no_context)
}
return p - buffer;
}
-
-struct numa_maps {
- unsigned long pages;
- unsigned long anon;
- unsigned long active;
- unsigned long writeback;
- unsigned long mapcount_max;
- unsigned long dirty;
- unsigned long swapcache;
- unsigned long node[MAX_NUMNODES];
-};
-
-static void gather_stats(struct page *page, void *private, int pte_dirty)
-{
- struct numa_maps *md = private;
- int count = page_mapcount(page);
-
- md->pages++;
- if (pte_dirty || PageDirty(page))
- md->dirty++;
-
- if (PageSwapCache(page))
- md->swapcache++;
-
- if (PageActive(page) || PageUnevictable(page))
- md->active++;
-
- if (PageWriteback(page))
- md->writeback++;
-
- if (PageAnon(page))
- md->anon++;
-
- if (count > md->mapcount_max)
- md->mapcount_max = count;
-
- md->node[page_to_nid(page)]++;
-}
-
-#ifdef CONFIG_HUGETLB_PAGE
-static void check_huge_range(struct vm_area_struct *vma,
- unsigned long start, unsigned long end,
- struct numa_maps *md)
-{
- unsigned long addr;
- struct page *page;
- struct hstate *h = hstate_vma(vma);
- unsigned long sz = huge_page_size(h);
-
- for (addr = start; addr < end; addr += sz) {
- pte_t *ptep = huge_pte_offset(vma->vm_mm,
- addr & huge_page_mask(h));
- pte_t pte;
-
- if (!ptep)
- continue;
-
- pte = *ptep;
- if (pte_none(pte))
- continue;
-
- page = pte_page(pte);
- if (!page)
- continue;
-
- gather_stats(page, md, pte_dirty(*ptep));
- }
-}
-#else
-static inline void check_huge_range(struct vm_area_struct *vma,
- unsigned long start, unsigned long end,
- struct numa_maps *md)
-{
-}
-#endif
-
-/*
- * Display pages allocated per node and memory policy via /proc.
- */
-int show_numa_map(struct seq_file *m, void *v)
-{
- struct proc_maps_private *priv = m->private;
- struct vm_area_struct *vma = v;
- struct numa_maps *md;
- struct file *file = vma->vm_file;
- struct mm_struct *mm = vma->vm_mm;
- struct mempolicy *pol;
- int n;
- char buffer[50];
-
- if (!mm)
- return 0;
-
- md = kzalloc(sizeof(struct numa_maps), GFP_KERNEL);
- if (!md)
- return 0;
-
- pol = get_vma_policy(priv->task, vma, vma->vm_start);
- mpol_to_str(buffer, sizeof(buffer), pol, 0);
- mpol_cond_put(pol);
-
- seq_printf(m, "%08lx %s", vma->vm_start, buffer);
-
- if (file) {
- seq_printf(m, " file=");
- seq_path(m, &file->f_path, "\n\t= ");
- } else if (vma->vm_start <= mm->brk && vma->vm_end >= mm->start_brk) {
- seq_printf(m, " heap");
- } else if (vma->vm_start <= mm->start_stack &&
- vma->vm_end >= mm->start_stack) {
- seq_printf(m, " stack");
- }
-
- if (is_vm_hugetlb_page(vma)) {
- check_huge_range(vma, vma->vm_start, vma->vm_end, md);
- seq_printf(m, " huge");
- } else {
- check_pgd_range(vma, vma->vm_start, vma->vm_end,
- &node_states[N_HIGH_MEMORY], MPOL_MF_STATS, md);
- }
-
- if (!md->pages)
- goto out;
-
- if (md->anon)
- seq_printf(m," anon=%lu",md->anon);
-
- if (md->dirty)
- seq_printf(m," dirty=%lu",md->dirty);
-
- if (md->pages != md->anon && md->pages != md->dirty)
- seq_printf(m, " mapped=%lu", md->pages);
-
- if (md->mapcount_max > 1)
- seq_printf(m, " mapmax=%lu", md->mapcount_max);
-
- if (md->swapcache)
- seq_printf(m," swapcache=%lu", md->swapcache);
-
- if (md->active < md->pages && !is_vm_hugetlb_page(vma))
- seq_printf(m," active=%lu", md->active);
-
- if (md->writeback)
- seq_printf(m," writeback=%lu", md->writeback);
-
- for_each_node_state(n, N_HIGH_MEMORY)
- if (md->node[n])
- seq_printf(m, " N%d=%lu", n, md->node[n]);
-out:
- seq_putc(m, '\n');
- kfree(md);
-
- if (m->count < m->size)
- m->version = (vma != priv->tail_vma) ? vma->vm_start : 0;
- return 0;
-}
diff --git a/mm/migrate.c b/mm/migrate.c
index 34132f8e9109..e4a5c912983d 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -721,15 +721,11 @@ static int unmap_and_move(new_page_t get_new_page, unsigned long private,
* Only page_lock_anon_vma() understands the subtleties of
* getting a hold on an anon_vma from outside one of its mms.
*/
- anon_vma = page_lock_anon_vma(page);
+ anon_vma = page_get_anon_vma(page);
if (anon_vma) {
/*
- * Take a reference count on the anon_vma if the
- * page is mapped so that it is guaranteed to
- * exist when the page is remapped later
+ * Anon page
*/
- get_anon_vma(anon_vma);
- page_unlock_anon_vma(anon_vma);
} else if (PageSwapCache(page)) {
/*
* We cannot be sure that the anon_vma of an unmapped
@@ -857,13 +853,8 @@ static int unmap_and_move_huge_page(new_page_t get_new_page,
lock_page(hpage);
}
- if (PageAnon(hpage)) {
- anon_vma = page_lock_anon_vma(hpage);
- if (anon_vma) {
- get_anon_vma(anon_vma);
- page_unlock_anon_vma(anon_vma);
- }
- }
+ if (PageAnon(hpage))
+ anon_vma = page_get_anon_vma(hpage);
try_to_unmap(hpage, TTU_MIGRATION|TTU_IGNORE_MLOCK|TTU_IGNORE_ACCESS);
diff --git a/mm/mmap.c b/mm/mmap.c
index 772140c53ab1..ac2631b7477f 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -84,10 +84,14 @@ pgprot_t vm_get_page_prot(unsigned long vm_flags)
}
EXPORT_SYMBOL(vm_get_page_prot);
-int sysctl_overcommit_memory = OVERCOMMIT_GUESS; /* heuristic overcommit */
-int sysctl_overcommit_ratio = 50; /* default is 50% */
+int sysctl_overcommit_memory __read_mostly = OVERCOMMIT_GUESS; /* heuristic overcommit */
+int sysctl_overcommit_ratio __read_mostly = 50; /* default is 50% */
int sysctl_max_map_count __read_mostly = DEFAULT_MAX_MAP_COUNT;
-struct percpu_counter vm_committed_as;
+/*
+ * Make sure vm_committed_as in one cacheline and not cacheline shared with
+ * other variables. It can be updated by several CPUs frequently.
+ */
+struct percpu_counter vm_committed_as ____cacheline_aligned_in_smp;
/*
* Check that a process has enough memory to allocate a new virtual
@@ -190,7 +194,7 @@ error:
}
/*
- * Requires inode->i_mapping->i_mmap_lock
+ * Requires inode->i_mapping->i_mmap_mutex
*/
static void __remove_shared_vm_struct(struct vm_area_struct *vma,
struct file *file, struct address_space *mapping)
@@ -218,9 +222,9 @@ void unlink_file_vma(struct vm_area_struct *vma)
if (file) {
struct address_space *mapping = file->f_mapping;
- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_mutex);
__remove_shared_vm_struct(vma, file, mapping);
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_mutex);
}
}
@@ -394,29 +398,6 @@ find_vma_prepare(struct mm_struct *mm, unsigned long addr,
return vma;
}
-static inline void
-__vma_link_list(struct mm_struct *mm, struct vm_area_struct *vma,
- struct vm_area_struct *prev, struct rb_node *rb_parent)
-{
- struct vm_area_struct *next;
-
- vma->vm_prev = prev;
- if (prev) {
- next = prev->vm_next;
- prev->vm_next = vma;
- } else {
- mm->mmap = vma;
- if (rb_parent)
- next = rb_entry(rb_parent,
- struct vm_area_struct, vm_rb);
- else
- next = NULL;
- }
- vma->vm_next = next;
- if (next)
- next->vm_prev = vma;
-}
-
void __vma_link_rb(struct mm_struct *mm, struct vm_area_struct *vma,
struct rb_node **rb_link, struct rb_node *rb_parent)
{
@@ -464,16 +445,14 @@ static void vma_link(struct mm_struct *mm, struct vm_area_struct *vma,
if (vma->vm_file)
mapping = vma->vm_file->f_mapping;
- if (mapping) {
- spin_lock(&mapping->i_mmap_lock);
- vma->vm_truncate_count = mapping->truncate_count;
- }
+ if (mapping)
+ mutex_lock(&mapping->i_mmap_mutex);
__vma_link(mm, vma, prev, rb_link, rb_parent);
__vma_link_file(vma);
if (mapping)
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_mutex);
mm->map_count++;
validate_mm(mm);
@@ -576,17 +555,8 @@ again: remove_next = 1 + (end > next->vm_end);
mapping = file->f_mapping;
if (!(vma->vm_flags & VM_NONLINEAR))
root = &mapping->i_mmap;
- spin_lock(&mapping->i_mmap_lock);
- if (importer &&
- vma->vm_truncate_count != next->vm_truncate_count) {
- /*
- * unmap_mapping_range might be in progress:
- * ensure that the expanding vma is rescanned.
- */
- importer->vm_truncate_count = 0;
- }
+ mutex_lock(&mapping->i_mmap_mutex);
if (insert) {
- insert->vm_truncate_count = vma->vm_truncate_count;
/*
* Put into prio_tree now, so instantiated pages
* are visible to arm/parisc __flush_dcache_page
@@ -605,7 +575,7 @@ again: remove_next = 1 + (end > next->vm_end);
* lock may be shared between many sibling processes. Skipping
* the lock for brk adjustments makes a difference sometimes.
*/
- if (vma->anon_vma && (insert || importer || start != vma->vm_start)) {
+ if (vma->anon_vma && (importer || start != vma->vm_start)) {
anon_vma = vma->anon_vma;
anon_vma_lock(anon_vma);
}
@@ -652,7 +622,7 @@ again: remove_next = 1 + (end > next->vm_end);
if (anon_vma)
anon_vma_unlock(anon_vma);
if (mapping)
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_mutex);
if (remove_next) {
if (file) {
@@ -699,9 +669,17 @@ static inline int is_mergeable_vma(struct vm_area_struct *vma,
}
static inline int is_mergeable_anon_vma(struct anon_vma *anon_vma1,
- struct anon_vma *anon_vma2)
+ struct anon_vma *anon_vma2,
+ struct vm_area_struct *vma)
{
- return !anon_vma1 || !anon_vma2 || (anon_vma1 == anon_vma2);
+ /*
+ * The list_is_singular() test is to avoid merging VMA cloned from
+ * parents. This can improve scalability caused by anon_vma lock.
+ */
+ if ((!anon_vma1 || !anon_vma2) && (!vma ||
+ list_is_singular(&vma->anon_vma_chain)))
+ return 1;
+ return anon_vma1 == anon_vma2;
}
/*
@@ -720,7 +698,7 @@ can_vma_merge_before(struct vm_area_struct *vma, unsigned long vm_flags,
struct anon_vma *anon_vma, struct file *file, pgoff_t vm_pgoff)
{
if (is_mergeable_vma(vma, file, vm_flags) &&
- is_mergeable_anon_vma(anon_vma, vma->anon_vma)) {
+ is_mergeable_anon_vma(anon_vma, vma->anon_vma, vma)) {
if (vma->vm_pgoff == vm_pgoff)
return 1;
}
@@ -739,7 +717,7 @@ can_vma_merge_after(struct vm_area_struct *vma, unsigned long vm_flags,
struct anon_vma *anon_vma, struct file *file, pgoff_t vm_pgoff)
{
if (is_mergeable_vma(vma, file, vm_flags) &&
- is_mergeable_anon_vma(anon_vma, vma->anon_vma)) {
+ is_mergeable_anon_vma(anon_vma, vma->anon_vma, vma)) {
pgoff_t vm_pglen;
vm_pglen = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
if (vma->vm_pgoff + vm_pglen == vm_pgoff)
@@ -817,7 +795,7 @@ struct vm_area_struct *vma_merge(struct mm_struct *mm,
can_vma_merge_before(next, vm_flags,
anon_vma, file, pgoff+pglen) &&
is_mergeable_anon_vma(prev->anon_vma,
- next->anon_vma)) {
+ next->anon_vma, NULL)) {
/* cases 1, 6 */
err = vma_adjust(prev, prev->vm_start,
next->vm_end, prev->vm_pgoff, NULL);
@@ -1785,7 +1763,7 @@ int expand_upwards(struct vm_area_struct *vma, unsigned long address)
/*
* vma is the first one with address < vma->vm_start. Have to extend vma.
*/
-static int expand_downwards(struct vm_area_struct *vma,
+int expand_downwards(struct vm_area_struct *vma,
unsigned long address)
{
int error;
@@ -1832,11 +1810,6 @@ static int expand_downwards(struct vm_area_struct *vma,
return error;
}
-int expand_stack_downwards(struct vm_area_struct *vma, unsigned long address)
-{
- return expand_downwards(vma, address);
-}
-
#ifdef CONFIG_STACK_GROWSUP
int expand_stack(struct vm_area_struct *vma, unsigned long address)
{
@@ -1919,17 +1892,17 @@ static void unmap_region(struct mm_struct *mm,
unsigned long start, unsigned long end)
{
struct vm_area_struct *next = prev? prev->vm_next: mm->mmap;
- struct mmu_gather *tlb;
+ struct mmu_gather tlb;
unsigned long nr_accounted = 0;
lru_add_drain();
- tlb = tlb_gather_mmu(mm, 0);
+ tlb_gather_mmu(&tlb, mm, 0);
update_hiwater_rss(mm);
unmap_vmas(&tlb, vma, start, end, &nr_accounted, NULL);
vm_unacct_memory(nr_accounted);
- free_pgtables(tlb, vma, prev? prev->vm_end: FIRST_USER_ADDRESS,
- next? next->vm_start: 0);
- tlb_finish_mmu(tlb, start, end);
+ free_pgtables(&tlb, vma, prev ? prev->vm_end : FIRST_USER_ADDRESS,
+ next ? next->vm_start : 0);
+ tlb_finish_mmu(&tlb, start, end);
}
/*
@@ -2271,7 +2244,7 @@ EXPORT_SYMBOL(do_brk);
/* Release all mmaps. */
void exit_mmap(struct mm_struct *mm)
{
- struct mmu_gather *tlb;
+ struct mmu_gather tlb;
struct vm_area_struct *vma;
unsigned long nr_accounted = 0;
unsigned long end;
@@ -2296,14 +2269,14 @@ void exit_mmap(struct mm_struct *mm)
lru_add_drain();
flush_cache_mm(mm);
- tlb = tlb_gather_mmu(mm, 1);
+ tlb_gather_mmu(&tlb, mm, 1);
/* update_hiwater_rss(mm) here? but nobody should be looking */
/* Use -1 here to ensure all VMAs in the mm are unmapped */
end = unmap_vmas(&tlb, vma, 0, -1, &nr_accounted, NULL);
vm_unacct_memory(nr_accounted);
- free_pgtables(tlb, vma, FIRST_USER_ADDRESS, 0);
- tlb_finish_mmu(tlb, 0, end);
+ free_pgtables(&tlb, vma, FIRST_USER_ADDRESS, 0);
+ tlb_finish_mmu(&tlb, 0, end);
/*
* Walk the list again, actually closing and freeing it,
@@ -2317,7 +2290,7 @@ void exit_mmap(struct mm_struct *mm)
/* Insert vm structure into process list sorted by address
* and into the inode's i_mmap tree. If vm_file is non-NULL
- * then i_mmap_lock is taken here.
+ * then i_mmap_mutex is taken here.
*/
int insert_vm_struct(struct mm_struct * mm, struct vm_area_struct * vma)
{
@@ -2529,15 +2502,15 @@ static void vm_lock_anon_vma(struct mm_struct *mm, struct anon_vma *anon_vma)
* The LSB of head.next can't change from under us
* because we hold the mm_all_locks_mutex.
*/
- spin_lock_nest_lock(&anon_vma->root->lock, &mm->mmap_sem);
+ mutex_lock_nest_lock(&anon_vma->root->mutex, &mm->mmap_sem);
/*
* We can safely modify head.next after taking the
- * anon_vma->root->lock. If some other vma in this mm shares
+ * anon_vma->root->mutex. If some other vma in this mm shares
* the same anon_vma we won't take it again.
*
* No need of atomic instructions here, head.next
* can't change from under us thanks to the
- * anon_vma->root->lock.
+ * anon_vma->root->mutex.
*/
if (__test_and_set_bit(0, (unsigned long *)
&anon_vma->root->head.next))
@@ -2559,7 +2532,7 @@ static void vm_lock_mapping(struct mm_struct *mm, struct address_space *mapping)
*/
if (test_and_set_bit(AS_MM_ALL_LOCKS, &mapping->flags))
BUG();
- spin_lock_nest_lock(&mapping->i_mmap_lock, &mm->mmap_sem);
+ mutex_lock_nest_lock(&mapping->i_mmap_mutex, &mm->mmap_sem);
}
}
@@ -2586,7 +2559,7 @@ static void vm_lock_mapping(struct mm_struct *mm, struct address_space *mapping)
* vma in this mm is backed by the same anon_vma or address_space.
*
* We can take all the locks in random order because the VM code
- * taking i_mmap_lock or anon_vma->lock outside the mmap_sem never
+ * taking i_mmap_mutex or anon_vma->mutex outside the mmap_sem never
* takes more than one of them in a row. Secondly we're protected
* against a concurrent mm_take_all_locks() by the mm_all_locks_mutex.
*
@@ -2642,7 +2615,7 @@ static void vm_unlock_anon_vma(struct anon_vma *anon_vma)
*
* No need of atomic instructions here, head.next
* can't change from under us until we release the
- * anon_vma->root->lock.
+ * anon_vma->root->mutex.
*/
if (!__test_and_clear_bit(0, (unsigned long *)
&anon_vma->root->head.next))
@@ -2658,7 +2631,7 @@ static void vm_unlock_mapping(struct address_space *mapping)
* AS_MM_ALL_LOCKS can't change to 0 from under us
* because we hold the mm_all_locks_mutex.
*/
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_mutex);
if (!test_and_clear_bit(AS_MM_ALL_LOCKS,
&mapping->flags))
BUG();
diff --git a/mm/mremap.c b/mm/mremap.c
index a7c1f9f9b941..506fa44403df 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -93,8 +93,7 @@ static void move_ptes(struct vm_area_struct *vma, pmd_t *old_pmd,
* and we propagate stale pages into the dst afterward.
*/
mapping = vma->vm_file->f_mapping;
- spin_lock(&mapping->i_mmap_lock);
- new_vma->vm_truncate_count = 0;
+ mutex_lock(&mapping->i_mmap_mutex);
}
/*
@@ -123,7 +122,7 @@ static void move_ptes(struct vm_area_struct *vma, pmd_t *old_pmd,
pte_unmap(new_pte - 1);
pte_unmap_unlock(old_pte - 1, old_ptl);
if (mapping)
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_mutex);
mmu_notifier_invalidate_range_end(vma->vm_mm, old_start, old_end);
}
diff --git a/mm/nobootmem.c b/mm/nobootmem.c
index 9109049f0bbc..6e93dc7f2586 100644
--- a/mm/nobootmem.c
+++ b/mm/nobootmem.c
@@ -307,30 +307,7 @@ void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size,
unsigned long align, unsigned long goal)
{
-#ifdef MAX_DMA32_PFN
- unsigned long end_pfn;
-
- if (WARN_ON_ONCE(slab_is_available()))
- return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
-
- /* update goal according ...MAX_DMA32_PFN */
- end_pfn = pgdat->node_start_pfn + pgdat->node_spanned_pages;
-
- if (end_pfn > MAX_DMA32_PFN + (128 >> (20 - PAGE_SHIFT)) &&
- (goal >> PAGE_SHIFT) < MAX_DMA32_PFN) {
- void *ptr;
- unsigned long new_goal;
-
- new_goal = MAX_DMA32_PFN << PAGE_SHIFT;
- ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
- new_goal, -1ULL);
- if (ptr)
- return ptr;
- }
-#endif
-
return __alloc_bootmem_node(pgdat, size, align, goal);
-
}
#ifdef CONFIG_SPARSEMEM
diff --git a/mm/nommu.c b/mm/nommu.c
index c4c542c736a9..1fd0c51b10a6 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -680,9 +680,9 @@ static void protect_vma(struct vm_area_struct *vma, unsigned long flags)
*/
static void add_vma_to_mm(struct mm_struct *mm, struct vm_area_struct *vma)
{
- struct vm_area_struct *pvma, **pp, *next;
+ struct vm_area_struct *pvma, *prev;
struct address_space *mapping;
- struct rb_node **p, *parent;
+ struct rb_node **p, *parent, *rb_prev;
kenter(",%p", vma);
@@ -703,7 +703,7 @@ static void add_vma_to_mm(struct mm_struct *mm, struct vm_area_struct *vma)
}
/* add the VMA to the tree */
- parent = NULL;
+ parent = rb_prev = NULL;
p = &mm->mm_rb.rb_node;
while (*p) {
parent = *p;
@@ -713,17 +713,20 @@ static void add_vma_to_mm(struct mm_struct *mm, struct vm_area_struct *vma)
* (the latter is necessary as we may get identical VMAs) */
if (vma->vm_start < pvma->vm_start)
p = &(*p)->rb_left;
- else if (vma->vm_start > pvma->vm_start)
+ else if (vma->vm_start > pvma->vm_start) {
+ rb_prev = parent;
p = &(*p)->rb_right;
- else if (vma->vm_end < pvma->vm_end)
+ } else if (vma->vm_end < pvma->vm_end)
p = &(*p)->rb_left;
- else if (vma->vm_end > pvma->vm_end)
+ else if (vma->vm_end > pvma->vm_end) {
+ rb_prev = parent;
p = &(*p)->rb_right;
- else if (vma < pvma)
+ } else if (vma < pvma)
p = &(*p)->rb_left;
- else if (vma > pvma)
+ else if (vma > pvma) {
+ rb_prev = parent;
p = &(*p)->rb_right;
- else
+ } else
BUG();
}
@@ -731,20 +734,11 @@ static void add_vma_to_mm(struct mm_struct *mm, struct vm_area_struct *vma)
rb_insert_color(&vma->vm_rb, &mm->mm_rb);
/* add VMA to the VMA list also */
- for (pp = &mm->mmap; (pvma = *pp); pp = &(*pp)->vm_next) {
- if (pvma->vm_start > vma->vm_start)
- break;
- if (pvma->vm_start < vma->vm_start)
- continue;
- if (pvma->vm_end < vma->vm_end)
- break;
- }
+ prev = NULL;
+ if (rb_prev)
+ prev = rb_entry(rb_prev, struct vm_area_struct, vm_rb);
- next = *pp;
- *pp = vma;
- vma->vm_next = next;
- if (next)
- next->vm_prev = vma;
+ __vma_link_list(mm, vma, prev, parent);
}
/*
@@ -752,7 +746,6 @@ static void add_vma_to_mm(struct mm_struct *mm, struct vm_area_struct *vma)
*/
static void delete_vma_from_mm(struct vm_area_struct *vma)
{
- struct vm_area_struct **pp;
struct address_space *mapping;
struct mm_struct *mm = vma->vm_mm;
@@ -775,12 +768,14 @@ static void delete_vma_from_mm(struct vm_area_struct *vma)
/* remove from the MM's tree and list */
rb_erase(&vma->vm_rb, &mm->mm_rb);
- for (pp = &mm->mmap; *pp; pp = &(*pp)->vm_next) {
- if (*pp == vma) {
- *pp = vma->vm_next;
- break;
- }
- }
+
+ if (vma->vm_prev)
+ vma->vm_prev->vm_next = vma->vm_next;
+ else
+ mm->mmap = vma->vm_next;
+
+ if (vma->vm_next)
+ vma->vm_next->vm_prev = vma->vm_prev;
vma->vm_mm = NULL;
}
@@ -809,17 +804,15 @@ static void delete_vma(struct mm_struct *mm, struct vm_area_struct *vma)
struct vm_area_struct *find_vma(struct mm_struct *mm, unsigned long addr)
{
struct vm_area_struct *vma;
- struct rb_node *n = mm->mm_rb.rb_node;
/* check the cache first */
vma = mm->mmap_cache;
if (vma && vma->vm_start <= addr && vma->vm_end > addr)
return vma;
- /* trawl the tree (there may be multiple mappings in which addr
+ /* trawl the list (there may be multiple mappings in which addr
* resides) */
- for (n = rb_first(&mm->mm_rb); n; n = rb_next(n)) {
- vma = rb_entry(n, struct vm_area_struct, vm_rb);
+ for (vma = mm->mmap; vma; vma = vma->vm_next) {
if (vma->vm_start > addr)
return NULL;
if (vma->vm_end > addr) {
@@ -859,7 +852,6 @@ static struct vm_area_struct *find_vma_exact(struct mm_struct *mm,
unsigned long len)
{
struct vm_area_struct *vma;
- struct rb_node *n = mm->mm_rb.rb_node;
unsigned long end = addr + len;
/* check the cache first */
@@ -867,10 +859,9 @@ static struct vm_area_struct *find_vma_exact(struct mm_struct *mm,
if (vma && vma->vm_start == addr && vma->vm_end == end)
return vma;
- /* trawl the tree (there may be multiple mappings in which addr
+ /* trawl the list (there may be multiple mappings in which addr
* resides) */
- for (n = rb_first(&mm->mm_rb); n; n = rb_next(n)) {
- vma = rb_entry(n, struct vm_area_struct, vm_rb);
+ for (vma = mm->mmap; vma; vma = vma->vm_next) {
if (vma->vm_start < addr)
continue;
if (vma->vm_start > addr)
@@ -1133,7 +1124,7 @@ static int do_mmap_private(struct vm_area_struct *vma,
unsigned long capabilities)
{
struct page *pages;
- unsigned long total, point, n, rlen;
+ unsigned long total, point, n;
void *base;
int ret, order;
@@ -1157,13 +1148,12 @@ static int do_mmap_private(struct vm_area_struct *vma,
* make a private copy of the data and map that instead */
}
- rlen = PAGE_ALIGN(len);
/* allocate some memory to hold the mapping
* - note that this may not return a page-aligned address if the object
* we're allocating is smaller than a page
*/
- order = get_order(rlen);
+ order = get_order(len);
kdebug("alloc order %d for %lx", order, len);
pages = alloc_pages(GFP_KERNEL, order);
@@ -1173,7 +1163,7 @@ static int do_mmap_private(struct vm_area_struct *vma,
total = 1 << order;
atomic_long_add(total, &mmap_pages_allocated);
- point = rlen >> PAGE_SHIFT;
+ point = len >> PAGE_SHIFT;
/* we allocated a power-of-2 sized page set, so we may want to trim off
* the excess */
@@ -1195,7 +1185,7 @@ static int do_mmap_private(struct vm_area_struct *vma,
base = page_address(pages);
region->vm_flags = vma->vm_flags |= VM_MAPPED_COPY;
region->vm_start = (unsigned long) base;
- region->vm_end = region->vm_start + rlen;
+ region->vm_end = region->vm_start + len;
region->vm_top = region->vm_start + (total << PAGE_SHIFT);
vma->vm_start = region->vm_start;
@@ -1211,22 +1201,22 @@ static int do_mmap_private(struct vm_area_struct *vma,
old_fs = get_fs();
set_fs(KERNEL_DS);
- ret = vma->vm_file->f_op->read(vma->vm_file, base, rlen, &fpos);
+ ret = vma->vm_file->f_op->read(vma->vm_file, base, len, &fpos);
set_fs(old_fs);
if (ret < 0)
goto error_free;
/* clear the last little bit */
- if (ret < rlen)
- memset(base + ret, 0, rlen - ret);
+ if (ret < len)
+ memset(base + ret, 0, len - ret);
}
return 0;
error_free:
- free_page_series(region->vm_start, region->vm_end);
+ free_page_series(region->vm_start, region->vm_top);
region->vm_start = vma->vm_start = 0;
region->vm_end = vma->vm_end = 0;
region->vm_top = 0;
@@ -1235,7 +1225,7 @@ error_free:
enomem:
printk("Allocation of length %lu from process %d (%s) failed\n",
len, current->pid, current->comm);
- show_free_areas();
+ show_free_areas(0);
return -ENOMEM;
}
@@ -1268,6 +1258,7 @@ unsigned long do_mmap_pgoff(struct file *file,
/* we ignore the address hint */
addr = 0;
+ len = PAGE_ALIGN(len);
/* we've determined that we can make the mapping, now translate what we
* now know into VMA flags */
@@ -1385,15 +1376,15 @@ unsigned long do_mmap_pgoff(struct file *file,
if (capabilities & BDI_CAP_MAP_DIRECT) {
addr = file->f_op->get_unmapped_area(file, addr, len,
pgoff, flags);
- if (IS_ERR((void *) addr)) {
+ if (IS_ERR_VALUE(addr)) {
ret = addr;
- if (ret != (unsigned long) -ENOSYS)
+ if (ret != -ENOSYS)
goto error_just_free;
/* the driver refused to tell us where to site
* the mapping so we'll have to attempt to copy
* it */
- ret = (unsigned long) -ENODEV;
+ ret = -ENODEV;
if (!(capabilities & BDI_CAP_MAP_COPY))
goto error_just_free;
@@ -1468,14 +1459,14 @@ error_getting_vma:
printk(KERN_WARNING "Allocation of vma for %lu byte allocation"
" from process %d failed\n",
len, current->pid);
- show_free_areas();
+ show_free_areas(0);
return -ENOMEM;
error_getting_region:
printk(KERN_WARNING "Allocation of vm region for %lu byte allocation"
" from process %d failed\n",
len, current->pid);
- show_free_areas();
+ show_free_areas(0);
return -ENOMEM;
}
EXPORT_SYMBOL(do_mmap_pgoff);
@@ -1644,15 +1635,17 @@ static int shrink_vma(struct mm_struct *mm,
int do_munmap(struct mm_struct *mm, unsigned long start, size_t len)
{
struct vm_area_struct *vma;
- struct rb_node *rb;
- unsigned long end = start + len;
+ unsigned long end;
int ret;
kenter(",%lx,%zx", start, len);
+ len = PAGE_ALIGN(len);
if (len == 0)
return -EINVAL;
+ end = start + len;
+
/* find the first potentially overlapping VMA */
vma = find_vma(mm, start);
if (!vma) {
@@ -1677,9 +1670,8 @@ int do_munmap(struct mm_struct *mm, unsigned long start, size_t len)
}
if (end == vma->vm_end)
goto erase_whole_vma;
- rb = rb_next(&vma->vm_rb);
- vma = rb_entry(rb, struct vm_area_struct, vm_rb);
- } while (rb);
+ vma = vma->vm_next;
+ } while (vma);
kleave(" = -EINVAL [split file]");
return -EINVAL;
} else {
@@ -1773,6 +1765,8 @@ unsigned long do_mremap(unsigned long addr,
struct vm_area_struct *vma;
/* insanity checks first */
+ old_len = PAGE_ALIGN(old_len);
+ new_len = PAGE_ALIGN(new_len);
if (old_len == 0 || new_len == 0)
return (unsigned long) -EINVAL;
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index f52e85c80e8d..e4b0991ca351 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -38,6 +38,33 @@ int sysctl_oom_kill_allocating_task;
int sysctl_oom_dump_tasks = 1;
static DEFINE_SPINLOCK(zone_scan_lock);
+/**
+ * test_set_oom_score_adj() - set current's oom_score_adj and return old value
+ * @new_val: new oom_score_adj value
+ *
+ * Sets the oom_score_adj value for current to @new_val with proper
+ * synchronization and returns the old value. Usually used to temporarily
+ * set a value, save the old value in the caller, and then reinstate it later.
+ */
+int test_set_oom_score_adj(int new_val)
+{
+ struct sighand_struct *sighand = current->sighand;
+ int old_val;
+
+ spin_lock_irq(&sighand->siglock);
+ old_val = current->signal->oom_score_adj;
+ if (new_val != old_val) {
+ if (new_val == OOM_SCORE_ADJ_MIN)
+ atomic_inc(&current->mm->oom_disable_count);
+ else if (old_val == OOM_SCORE_ADJ_MIN)
+ atomic_dec(&current->mm->oom_disable_count);
+ current->signal->oom_score_adj = new_val;
+ }
+ spin_unlock_irq(&sighand->siglock);
+
+ return old_val;
+}
+
#ifdef CONFIG_NUMA
/**
* has_intersects_mems_allowed() - check task eligiblity for kill
@@ -155,15 +182,6 @@ unsigned int oom_badness(struct task_struct *p, struct mem_cgroup *mem,
}
/*
- * When the PF_OOM_ORIGIN bit is set, it indicates the task should have
- * priority for oom killing.
- */
- if (p->flags & PF_OOM_ORIGIN) {
- task_unlock(p);
- return 1000;
- }
-
- /*
* The memory controller may have a limit of 0 bytes, so avoid a divide
* by zero, if necessary.
*/
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 3f8bce264df6..2a00f17c3bf4 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -30,6 +30,7 @@
#include <linux/pagevec.h>
#include <linux/blkdev.h>
#include <linux/slab.h>
+#include <linux/ratelimit.h>
#include <linux/oom.h>
#include <linux/notifier.h>
#include <linux/topology.h>
@@ -39,6 +40,7 @@
#include <linux/memory_hotplug.h>
#include <linux/nodemask.h>
#include <linux/vmalloc.h>
+#include <linux/vmstat.h>
#include <linux/mempolicy.h>
#include <linux/stop_machine.h>
#include <linux/sort.h>
@@ -54,6 +56,7 @@
#include <trace/events/kmem.h>
#include <linux/ftrace_event.h>
#include <linux/memcontrol.h>
+#include <linux/prefetch.h>
#include <asm/tlbflush.h>
#include <asm/div64.h>
@@ -1734,6 +1737,45 @@ static inline bool should_suppress_show_mem(void)
return ret;
}
+static DEFINE_RATELIMIT_STATE(nopage_rs,
+ DEFAULT_RATELIMIT_INTERVAL,
+ DEFAULT_RATELIMIT_BURST);
+
+void warn_alloc_failed(gfp_t gfp_mask, int order, const char *fmt, ...)
+{
+ va_list args;
+ unsigned int filter = SHOW_MEM_FILTER_NODES;
+
+ if ((gfp_mask & __GFP_NOWARN) || !__ratelimit(&nopage_rs))
+ return;
+
+ /*
+ * This documents exceptions given to allocations in certain
+ * contexts that are allowed to allocate outside current's set
+ * of allowed nodes.
+ */
+ if (!(gfp_mask & __GFP_NOMEMALLOC))
+ if (test_thread_flag(TIF_MEMDIE) ||
+ (current->flags & (PF_MEMALLOC | PF_EXITING)))
+ filter &= ~SHOW_MEM_FILTER_NODES;
+ if (in_interrupt() || !(gfp_mask & __GFP_WAIT))
+ filter &= ~SHOW_MEM_FILTER_NODES;
+
+ if (fmt) {
+ printk(KERN_WARNING);
+ va_start(args, fmt);
+ vprintk(fmt, args);
+ va_end(args);
+ }
+
+ pr_warning("%s: page allocation failure: order:%d, mode:0x%x\n",
+ current->comm, order, gfp_mask);
+
+ dump_stack();
+ if (!should_suppress_show_mem())
+ show_mem(filter);
+}
+
static inline int
should_alloc_retry(gfp_t gfp_mask, unsigned int order,
unsigned long pages_reclaimed)
@@ -2064,6 +2106,7 @@ restart:
first_zones_zonelist(zonelist, high_zoneidx, NULL,
&preferred_zone);
+rebalance:
/* This is the last chance, in general, before the goto nopage. */
page = get_page_from_freelist(gfp_mask, nodemask, order, zonelist,
high_zoneidx, alloc_flags & ~ALLOC_NO_WATERMARKS,
@@ -2071,7 +2114,6 @@ restart:
if (page)
goto got_pg;
-rebalance:
/* Allocate without watermarks if the context allows */
if (alloc_flags & ALLOC_NO_WATERMARKS) {
page = __alloc_pages_high_priority(gfp_mask, order,
@@ -2105,7 +2147,7 @@ rebalance:
sync_migration);
if (page)
goto got_pg;
- sync_migration = !(gfp_mask & __GFP_NO_KSWAPD);
+ sync_migration = true;
/* Try direct reclaim and then allocating */
page = __alloc_pages_direct_reclaim(gfp_mask, order,
@@ -2176,27 +2218,7 @@ rebalance:
}
nopage:
- if (!(gfp_mask & __GFP_NOWARN) && printk_ratelimit()) {
- unsigned int filter = SHOW_MEM_FILTER_NODES;
-
- /*
- * This documents exceptions given to allocations in certain
- * contexts that are allowed to allocate outside current's set
- * of allowed nodes.
- */
- if (!(gfp_mask & __GFP_NOMEMALLOC))
- if (test_thread_flag(TIF_MEMDIE) ||
- (current->flags & (PF_MEMALLOC | PF_EXITING)))
- filter &= ~SHOW_MEM_FILTER_NODES;
- if (in_interrupt() || !wait)
- filter &= ~SHOW_MEM_FILTER_NODES;
-
- pr_warning("%s: page allocation failure. order:%d, mode:0x%x\n",
- current->comm, order, gfp_mask);
- dump_stack();
- if (!should_suppress_show_mem())
- show_mem(filter);
- }
+ warn_alloc_failed(gfp_mask, order, NULL);
return page;
got_pg:
if (kmemcheck_enabled)
@@ -2225,6 +2247,10 @@ __alloc_pages_nodemask(gfp_t gfp_mask, unsigned int order,
if (should_fail_alloc_page(gfp_mask, order))
return NULL;
+#ifndef CONFIG_ZONE_DMA
+ if (WARN_ON_ONCE(gfp_mask & __GFP_DMA))
+ return NULL;
+#endif
/*
* Check the zones suitable for the gfp_mask contain at least one
@@ -2472,10 +2498,10 @@ void si_meminfo_node(struct sysinfo *val, int nid)
#endif
/*
- * Determine whether the zone's node should be displayed or not, depending on
- * whether SHOW_MEM_FILTER_NODES was passed to __show_free_areas().
+ * Determine whether the node should be displayed or not, depending on whether
+ * SHOW_MEM_FILTER_NODES was passed to show_free_areas().
*/
-static bool skip_free_areas_zone(unsigned int flags, const struct zone *zone)
+bool skip_free_areas_node(unsigned int flags, int nid)
{
bool ret = false;
@@ -2483,8 +2509,7 @@ static bool skip_free_areas_zone(unsigned int flags, const struct zone *zone)
goto out;
get_mems_allowed();
- ret = !node_isset(zone->zone_pgdat->node_id,
- cpuset_current_mems_allowed);
+ ret = !node_isset(nid, cpuset_current_mems_allowed);
put_mems_allowed();
out:
return ret;
@@ -2499,13 +2524,13 @@ out:
* Suppresses nodes that are not allowed by current's cpuset if
* SHOW_MEM_FILTER_NODES is passed.
*/
-void __show_free_areas(unsigned int filter)
+void show_free_areas(unsigned int filter)
{
int cpu;
struct zone *zone;
for_each_populated_zone(zone) {
- if (skip_free_areas_zone(filter, zone))
+ if (skip_free_areas_node(filter, zone_to_nid(zone)))
continue;
show_node(zone);
printk("%s per-cpu:\n", zone->name);
@@ -2548,7 +2573,7 @@ void __show_free_areas(unsigned int filter)
for_each_populated_zone(zone) {
int i;
- if (skip_free_areas_zone(filter, zone))
+ if (skip_free_areas_node(filter, zone_to_nid(zone)))
continue;
show_node(zone);
printk("%s"
@@ -2617,7 +2642,7 @@ void __show_free_areas(unsigned int filter)
for_each_populated_zone(zone) {
unsigned long nr[MAX_ORDER], flags, order, total = 0;
- if (skip_free_areas_zone(filter, zone))
+ if (skip_free_areas_node(filter, zone_to_nid(zone)))
continue;
show_node(zone);
printk("%s: ", zone->name);
@@ -2638,11 +2663,6 @@ void __show_free_areas(unsigned int filter)
show_swap_cache_info();
}
-void show_free_areas(void)
-{
- __show_free_areas(0);
-}
-
static void zoneref_set_zone(struct zone *zone, struct zoneref *zoneref)
{
zoneref->zone = zone;
@@ -3313,6 +3333,20 @@ static inline unsigned long wait_table_bits(unsigned long size)
#define LONG_ALIGN(x) (((x)+(sizeof(long))-1)&~((sizeof(long))-1))
/*
+ * Check if a pageblock contains reserved pages
+ */
+static int pageblock_is_reserved(unsigned long start_pfn, unsigned long end_pfn)
+{
+ unsigned long pfn;
+
+ for (pfn = start_pfn; pfn < end_pfn; pfn++) {
+ if (!pfn_valid_within(pfn) || PageReserved(pfn_to_page(pfn)))
+ return 1;
+ }
+ return 0;
+}
+
+/*
* Mark a number of pageblocks as MIGRATE_RESERVE. The number
* of blocks reserved is based on min_wmark_pages(zone). The memory within
* the reserve will tend to store contiguous free pages. Setting min_free_kbytes
@@ -3321,7 +3355,7 @@ static inline unsigned long wait_table_bits(unsigned long size)
*/
static void setup_zone_migrate_reserve(struct zone *zone)
{
- unsigned long start_pfn, pfn, end_pfn;
+ unsigned long start_pfn, pfn, end_pfn, block_end_pfn;
struct page *page;
unsigned long block_migratetype;
int reserve;
@@ -3351,7 +3385,8 @@ static void setup_zone_migrate_reserve(struct zone *zone)
continue;
/* Blocks with reserved pages will never free, skip them. */
- if (PageReserved(page))
+ block_end_pfn = min(pfn + pageblock_nr_pages, end_pfn);
+ if (pageblock_is_reserved(pfn, block_end_pfn))
continue;
block_migratetype = get_pageblock_migratetype(page);
@@ -3540,7 +3575,7 @@ static void setup_pagelist_highmark(struct per_cpu_pageset *p,
pcp->batch = PAGE_SHIFT * 8;
}
-static __meminit void setup_zone_pageset(struct zone *zone)
+static void setup_zone_pageset(struct zone *zone)
{
int cpu;
@@ -5099,7 +5134,7 @@ void setup_per_zone_wmarks(void)
* 1TB 101 10GB
* 10TB 320 32GB
*/
-void calculate_zone_inactive_ratio(struct zone *zone)
+static void __meminit calculate_zone_inactive_ratio(struct zone *zone)
{
unsigned int gb, ratio;
@@ -5113,7 +5148,7 @@ void calculate_zone_inactive_ratio(struct zone *zone)
zone->inactive_ratio = ratio;
}
-static void __init setup_per_zone_inactive_ratio(void)
+static void __meminit setup_per_zone_inactive_ratio(void)
{
struct zone *zone;
@@ -5145,7 +5180,7 @@ static void __init setup_per_zone_inactive_ratio(void)
* 8192MB: 11584k
* 16384MB: 16384k
*/
-static int __init init_per_zone_wmark_min(void)
+int __meminit init_per_zone_wmark_min(void)
{
unsigned long lowmem_kbytes;
@@ -5157,6 +5192,7 @@ static int __init init_per_zone_wmark_min(void)
if (min_free_kbytes > 65536)
min_free_kbytes = 65536;
setup_per_zone_wmarks();
+ refresh_zone_stat_thresholds();
setup_per_zone_lowmem_reserve();
setup_per_zone_inactive_ratio();
return 0;
@@ -5507,10 +5543,8 @@ int set_migratetype_isolate(struct page *page)
struct memory_isolate_notify arg;
int notifier_ret;
int ret = -EBUSY;
- int zone_idx;
zone = page_zone(page);
- zone_idx = zone_idx(zone);
spin_lock_irqsave(&zone->lock, flags);
diff --git a/mm/percpu.c b/mm/percpu.c
index a160db39b810..bf80e55dbed7 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -1215,8 +1215,10 @@ int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai,
PCPU_SETUP_BUG_ON(ai->nr_groups <= 0);
#ifdef CONFIG_SMP
PCPU_SETUP_BUG_ON(!ai->static_size);
+ PCPU_SETUP_BUG_ON((unsigned long)__per_cpu_start & ~PAGE_MASK);
#endif
PCPU_SETUP_BUG_ON(!base_addr);
+ PCPU_SETUP_BUG_ON((unsigned long)base_addr & ~PAGE_MASK);
PCPU_SETUP_BUG_ON(ai->unit_size < size_sum);
PCPU_SETUP_BUG_ON(ai->unit_size & ~PAGE_MASK);
PCPU_SETUP_BUG_ON(ai->unit_size < PCPU_MIN_UNIT_SIZE);
@@ -1645,8 +1647,8 @@ int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size,
/* warn if maximum distance is further than 75% of vmalloc space */
if (max_distance > (VMALLOC_END - VMALLOC_START) * 3 / 4) {
pr_warning("PERCPU: max_distance=0x%zx too large for vmalloc "
- "space 0x%lx\n",
- max_distance, VMALLOC_END - VMALLOC_START);
+ "space 0x%lx\n", max_distance,
+ (unsigned long)(VMALLOC_END - VMALLOC_START));
#ifdef CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK
/* and fail if we have fallback */
rc = -EINVAL;
diff --git a/mm/prio_tree.c b/mm/prio_tree.c
index 603ae98d9694..799dcfd7cd8c 100644
--- a/mm/prio_tree.c
+++ b/mm/prio_tree.c
@@ -13,6 +13,7 @@
#include <linux/mm.h>
#include <linux/prio_tree.h>
+#include <linux/prefetch.h>
/*
* See lib/prio_tree.c for details on the general radix priority search tree
diff --git a/mm/readahead.c b/mm/readahead.c
index 2c0cc489e288..867f9dd82dcd 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -180,7 +180,7 @@ __do_page_cache_readahead(struct address_space *mapping, struct file *filp,
if (page)
continue;
- page = page_cache_alloc_cold(mapping);
+ page = page_cache_alloc_readahead(mapping);
if (!page)
break;
page->index = page_offset;
diff --git a/mm/rmap.c b/mm/rmap.c
index 8da044a1db0f..3a39b518a653 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -24,8 +24,8 @@
* inode->i_alloc_sem (vmtruncate_range)
* mm->mmap_sem
* page->flags PG_locked (lock_page)
- * mapping->i_mmap_lock
- * anon_vma->lock
+ * mapping->i_mmap_mutex
+ * anon_vma->mutex
* mm->page_table_lock or pte_lock
* zone->lru_lock (in mark_page_accessed, isolate_lru_page)
* swap_lock (in swap_duplicate, swap_info_get)
@@ -40,7 +40,7 @@
*
* (code doesn't rely on that order so it could be switched around)
* ->tasklist_lock
- * anon_vma->lock (memory_failure, collect_procs_anon)
+ * anon_vma->mutex (memory_failure, collect_procs_anon)
* pte map lock
*/
@@ -86,6 +86,29 @@ static inline struct anon_vma *anon_vma_alloc(void)
static inline void anon_vma_free(struct anon_vma *anon_vma)
{
VM_BUG_ON(atomic_read(&anon_vma->refcount));
+
+ /*
+ * Synchronize against page_lock_anon_vma() such that
+ * we can safely hold the lock without the anon_vma getting
+ * freed.
+ *
+ * Relies on the full mb implied by the atomic_dec_and_test() from
+ * put_anon_vma() against the acquire barrier implied by
+ * mutex_trylock() from page_lock_anon_vma(). This orders:
+ *
+ * page_lock_anon_vma() VS put_anon_vma()
+ * mutex_trylock() atomic_dec_and_test()
+ * LOCK MB
+ * atomic_read() mutex_is_locked()
+ *
+ * LOCK should suffice since the actual taking of the lock must
+ * happen _before_ what follows.
+ */
+ if (mutex_is_locked(&anon_vma->root->mutex)) {
+ anon_vma_lock(anon_vma);
+ anon_vma_unlock(anon_vma);
+ }
+
kmem_cache_free(anon_vma_cachep, anon_vma);
}
@@ -307,7 +330,7 @@ static void anon_vma_ctor(void *data)
{
struct anon_vma *anon_vma = data;
- spin_lock_init(&anon_vma->lock);
+ mutex_init(&anon_vma->mutex);
atomic_set(&anon_vma->refcount, 0);
INIT_LIST_HEAD(&anon_vma->head);
}
@@ -320,12 +343,26 @@ void __init anon_vma_init(void)
}
/*
- * Getting a lock on a stable anon_vma from a page off the LRU is
- * tricky: page_lock_anon_vma rely on RCU to guard against the races.
+ * Getting a lock on a stable anon_vma from a page off the LRU is tricky!
+ *
+ * Since there is no serialization what so ever against page_remove_rmap()
+ * the best this function can do is return a locked anon_vma that might
+ * have been relevant to this page.
+ *
+ * The page might have been remapped to a different anon_vma or the anon_vma
+ * returned may already be freed (and even reused).
+ *
+ * All users of this function must be very careful when walking the anon_vma
+ * chain and verify that the page in question is indeed mapped in it
+ * [ something equivalent to page_mapped_in_vma() ].
+ *
+ * Since anon_vma's slab is DESTROY_BY_RCU and we know from page_remove_rmap()
+ * that the anon_vma pointer from page->mapping is valid if there is a
+ * mapcount, we can dereference the anon_vma after observing those.
*/
-struct anon_vma *__page_lock_anon_vma(struct page *page)
+struct anon_vma *page_get_anon_vma(struct page *page)
{
- struct anon_vma *anon_vma, *root_anon_vma;
+ struct anon_vma *anon_vma = NULL;
unsigned long anon_mapping;
rcu_read_lock();
@@ -336,32 +373,97 @@ struct anon_vma *__page_lock_anon_vma(struct page *page)
goto out;
anon_vma = (struct anon_vma *) (anon_mapping - PAGE_MAPPING_ANON);
- root_anon_vma = ACCESS_ONCE(anon_vma->root);
- spin_lock(&root_anon_vma->lock);
+ if (!atomic_inc_not_zero(&anon_vma->refcount)) {
+ anon_vma = NULL;
+ goto out;
+ }
/*
* If this page is still mapped, then its anon_vma cannot have been
- * freed. But if it has been unmapped, we have no security against
- * the anon_vma structure being freed and reused (for another anon_vma:
- * SLAB_DESTROY_BY_RCU guarantees that - so the spin_lock above cannot
- * corrupt): with anon_vma_prepare() or anon_vma_fork() redirecting
- * anon_vma->root before page_unlock_anon_vma() is called to unlock.
+ * freed. But if it has been unmapped, we have no security against the
+ * anon_vma structure being freed and reused (for another anon_vma:
+ * SLAB_DESTROY_BY_RCU guarantees that - so the atomic_inc_not_zero()
+ * above cannot corrupt).
*/
- if (page_mapped(page))
- return anon_vma;
+ if (!page_mapped(page)) {
+ put_anon_vma(anon_vma);
+ anon_vma = NULL;
+ }
+out:
+ rcu_read_unlock();
+
+ return anon_vma;
+}
+
+/*
+ * Similar to page_get_anon_vma() except it locks the anon_vma.
+ *
+ * Its a little more complex as it tries to keep the fast path to a single
+ * atomic op -- the trylock. If we fail the trylock, we fall back to getting a
+ * reference like with page_get_anon_vma() and then block on the mutex.
+ */
+struct anon_vma *page_lock_anon_vma(struct page *page)
+{
+ struct anon_vma *anon_vma = NULL;
+ unsigned long anon_mapping;
+
+ rcu_read_lock();
+ anon_mapping = (unsigned long) ACCESS_ONCE(page->mapping);
+ if ((anon_mapping & PAGE_MAPPING_FLAGS) != PAGE_MAPPING_ANON)
+ goto out;
+ if (!page_mapped(page))
+ goto out;
+
+ anon_vma = (struct anon_vma *) (anon_mapping - PAGE_MAPPING_ANON);
+ if (mutex_trylock(&anon_vma->root->mutex)) {
+ /*
+ * If we observe a !0 refcount, then holding the lock ensures
+ * the anon_vma will not go away, see __put_anon_vma().
+ */
+ if (!atomic_read(&anon_vma->refcount)) {
+ anon_vma_unlock(anon_vma);
+ anon_vma = NULL;
+ }
+ goto out;
+ }
+
+ /* trylock failed, we got to sleep */
+ if (!atomic_inc_not_zero(&anon_vma->refcount)) {
+ anon_vma = NULL;
+ goto out;
+ }
+
+ if (!page_mapped(page)) {
+ put_anon_vma(anon_vma);
+ anon_vma = NULL;
+ goto out;
+ }
+
+ /* we pinned the anon_vma, its safe to sleep */
+ rcu_read_unlock();
+ anon_vma_lock(anon_vma);
+
+ if (atomic_dec_and_test(&anon_vma->refcount)) {
+ /*
+ * Oops, we held the last refcount, release the lock
+ * and bail -- can't simply use put_anon_vma() because
+ * we'll deadlock on the anon_vma_lock() recursion.
+ */
+ anon_vma_unlock(anon_vma);
+ __put_anon_vma(anon_vma);
+ anon_vma = NULL;
+ }
+
+ return anon_vma;
- spin_unlock(&root_anon_vma->lock);
out:
rcu_read_unlock();
- return NULL;
+ return anon_vma;
}
void page_unlock_anon_vma(struct anon_vma *anon_vma)
- __releases(&anon_vma->root->lock)
- __releases(RCU)
{
anon_vma_unlock(anon_vma);
- rcu_read_unlock();
}
/*
@@ -646,14 +748,14 @@ static int page_referenced_file(struct page *page,
* The page lock not only makes sure that page->mapping cannot
* suddenly be NULLified by truncation, it makes sure that the
* structure at mapping cannot be freed and reused yet,
- * so we can safely take mapping->i_mmap_lock.
+ * so we can safely take mapping->i_mmap_mutex.
*/
BUG_ON(!PageLocked(page));
- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_mutex);
/*
- * i_mmap_lock does not stabilize mapcount at all, but mapcount
+ * i_mmap_mutex does not stabilize mapcount at all, but mapcount
* is more likely to be accurate if we note it after spinning.
*/
mapcount = page_mapcount(page);
@@ -675,7 +777,7 @@ static int page_referenced_file(struct page *page,
break;
}
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_mutex);
return referenced;
}
@@ -719,7 +821,7 @@ int page_referenced(struct page *page,
unlock_page(page);
}
out:
- if (page_test_and_clear_young(page))
+ if (page_test_and_clear_young(page_to_pfn(page)))
referenced++;
return referenced;
@@ -762,7 +864,7 @@ static int page_mkclean_file(struct address_space *mapping, struct page *page)
BUG_ON(PageAnon(page));
- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_mutex);
vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) {
if (vma->vm_flags & VM_SHARED) {
unsigned long address = vma_address(page, vma);
@@ -771,7 +873,7 @@ static int page_mkclean_file(struct address_space *mapping, struct page *page)
ret += page_mkclean_one(page, vma, address);
}
}
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_mutex);
return ret;
}
@@ -785,10 +887,8 @@ int page_mkclean(struct page *page)
struct address_space *mapping = page_mapping(page);
if (mapping) {
ret = page_mkclean_file(mapping, page);
- if (page_test_dirty(page)) {
- page_clear_dirty(page, 1);
+ if (page_test_and_clear_dirty(page_to_pfn(page), 1))
ret = 1;
- }
}
}
@@ -981,10 +1081,9 @@ void page_remove_rmap(struct page *page)
* not if it's in swapcache - there might be another pte slot
* containing the swap entry, but page not yet written to swap.
*/
- if ((!PageAnon(page) || PageSwapCache(page)) && page_test_dirty(page)) {
- page_clear_dirty(page, 1);
+ if ((!PageAnon(page) || PageSwapCache(page)) &&
+ page_test_and_clear_dirty(page_to_pfn(page), 1))
set_page_dirty(page);
- }
/*
* Hugepages are not counted in NR_ANON_PAGES nor NR_FILE_MAPPED
* and not charged by memcg for now.
@@ -1122,7 +1221,7 @@ out_mlock:
/*
* We need mmap_sem locking, Otherwise VM_LOCKED check makes
* unstable result and race. Plus, We can't wait here because
- * we now hold anon_vma->lock or mapping->i_mmap_lock.
+ * we now hold anon_vma->mutex or mapping->i_mmap_mutex.
* if trylock failed, the page remain in evictable lru and later
* vmscan could retry to move the page to unevictable lru if the
* page is actually mlocked.
@@ -1348,7 +1447,7 @@ static int try_to_unmap_file(struct page *page, enum ttu_flags flags)
unsigned long max_nl_size = 0;
unsigned int mapcount;
- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_mutex);
vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) {
unsigned long address = vma_address(page, vma);
if (address == -EFAULT)
@@ -1394,7 +1493,7 @@ static int try_to_unmap_file(struct page *page, enum ttu_flags flags)
mapcount = page_mapcount(page);
if (!mapcount)
goto out;
- cond_resched_lock(&mapping->i_mmap_lock);
+ cond_resched();
max_nl_size = (max_nl_size + CLUSTER_SIZE - 1) & CLUSTER_MASK;
if (max_nl_cursor == 0)
@@ -1416,7 +1515,7 @@ static int try_to_unmap_file(struct page *page, enum ttu_flags flags)
}
vma->vm_private_data = (void *) max_nl_cursor;
}
- cond_resched_lock(&mapping->i_mmap_lock);
+ cond_resched();
max_nl_cursor += CLUSTER_SIZE;
} while (max_nl_cursor <= max_nl_size);
@@ -1428,7 +1527,7 @@ static int try_to_unmap_file(struct page *page, enum ttu_flags flags)
list_for_each_entry(vma, &mapping->i_mmap_nonlinear, shared.vm_set.list)
vma->vm_private_data = NULL;
out:
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_mutex);
return ret;
}
@@ -1547,7 +1646,7 @@ static int rmap_walk_file(struct page *page, int (*rmap_one)(struct page *,
if (!mapping)
return ret;
- spin_lock(&mapping->i_mmap_lock);
+ mutex_lock(&mapping->i_mmap_mutex);
vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) {
unsigned long address = vma_address(page, vma);
if (address == -EFAULT)
@@ -1561,7 +1660,7 @@ static int rmap_walk_file(struct page *page, int (*rmap_one)(struct page *,
* never contain migration ptes. Decide what to do about this
* limitation to linear when we need rmap_walk() on nonlinear.
*/
- spin_unlock(&mapping->i_mmap_lock);
+ mutex_unlock(&mapping->i_mmap_mutex);
return ret;
}
diff --git a/mm/shmem.c b/mm/shmem.c
index dfc7069102ee..69edb45a9f28 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -99,6 +99,13 @@ static struct vfsmount *shm_mnt;
/* Pretend that each entry is of this size in directory's i_size */
#define BOGO_DIRENT_SIZE 20
+struct shmem_xattr {
+ struct list_head list; /* anchored by shmem_inode_info->xattr_list */
+ char *name; /* xattr name */
+ size_t size;
+ char value[0];
+};
+
/* Flag allocation requirements to shmem_getpage and shmem_swp_alloc */
enum sgp_type {
SGP_READ, /* don't exceed i_size, don't allocate page */
@@ -822,6 +829,7 @@ static int shmem_notify_change(struct dentry *dentry, struct iattr *attr)
static void shmem_evict_inode(struct inode *inode)
{
struct shmem_inode_info *info = SHMEM_I(inode);
+ struct shmem_xattr *xattr, *nxattr;
if (inode->i_mapping->a_ops == &shmem_aops) {
truncate_inode_pages(inode->i_mapping, 0);
@@ -834,6 +842,11 @@ static void shmem_evict_inode(struct inode *inode)
mutex_unlock(&shmem_swaplist_mutex);
}
}
+
+ list_for_each_entry_safe(xattr, nxattr, &info->xattr_list, list) {
+ kfree(xattr->name);
+ kfree(xattr);
+ }
BUG_ON(inode->i_blocks);
shmem_free_inode(inode->i_sb);
end_writeback(inode);
@@ -916,11 +929,12 @@ static int shmem_unuse_inode(struct shmem_inode_info *info, swp_entry_t entry, s
if (size > ENTRIES_PER_PAGE)
size = ENTRIES_PER_PAGE;
offset = shmem_find_swp(entry, ptr, ptr+size);
+ shmem_swp_unmap(ptr);
if (offset >= 0) {
shmem_dir_unmap(dir);
+ ptr = shmem_swp_map(subdir);
goto found;
}
- shmem_swp_unmap(ptr);
}
}
lost1:
@@ -1614,6 +1628,7 @@ static struct inode *shmem_get_inode(struct super_block *sb, const struct inode
spin_lock_init(&info->lock);
info->flags = flags & VM_NORESERVE;
INIT_LIST_HEAD(&info->swaplist);
+ INIT_LIST_HEAD(&info->xattr_list);
cache_no_acl(inode);
switch (mode & S_IFMT) {
@@ -2013,9 +2028,9 @@ static int shmem_symlink(struct inode *dir, struct dentry *dentry, const char *s
info = SHMEM_I(inode);
inode->i_size = len-1;
- if (len <= (char *)inode - (char *)info) {
+ if (len <= SHMEM_SYMLINK_INLINE_LEN) {
/* do it inline */
- memcpy(info, symname, len);
+ memcpy(info->inline_symlink, symname, len);
inode->i_op = &shmem_symlink_inline_operations;
} else {
error = shmem_getpage(inode, 0, &page, SGP_WRITE, NULL);
@@ -2041,7 +2056,7 @@ static int shmem_symlink(struct inode *dir, struct dentry *dentry, const char *s
static void *shmem_follow_link_inline(struct dentry *dentry, struct nameidata *nd)
{
- nd_set_link(nd, (char *)SHMEM_I(dentry->d_inode));
+ nd_set_link(nd, SHMEM_I(dentry->d_inode)->inline_symlink);
return NULL;
}
@@ -2065,63 +2080,253 @@ static void shmem_put_link(struct dentry *dentry, struct nameidata *nd, void *co
}
}
-static const struct inode_operations shmem_symlink_inline_operations = {
- .readlink = generic_readlink,
- .follow_link = shmem_follow_link_inline,
-};
-
-static const struct inode_operations shmem_symlink_inode_operations = {
- .readlink = generic_readlink,
- .follow_link = shmem_follow_link,
- .put_link = shmem_put_link,
-};
-
-#ifdef CONFIG_TMPFS_POSIX_ACL
+#ifdef CONFIG_TMPFS_XATTR
/*
- * Superblocks without xattr inode operations will get security.* xattr
- * support from the VFS "for free". As soon as we have any other xattrs
+ * Superblocks without xattr inode operations may get some security.* xattr
+ * support from the LSM "for free". As soon as we have any other xattrs
* like ACLs, we also need to implement the security.* handlers at
* filesystem level, though.
*/
-static size_t shmem_xattr_security_list(struct dentry *dentry, char *list,
- size_t list_len, const char *name,
- size_t name_len, int handler_flags)
+static int shmem_xattr_get(struct dentry *dentry, const char *name,
+ void *buffer, size_t size)
{
- return security_inode_listsecurity(dentry->d_inode, list, list_len);
-}
+ struct shmem_inode_info *info;
+ struct shmem_xattr *xattr;
+ int ret = -ENODATA;
-static int shmem_xattr_security_get(struct dentry *dentry, const char *name,
- void *buffer, size_t size, int handler_flags)
-{
- if (strcmp(name, "") == 0)
- return -EINVAL;
- return xattr_getsecurity(dentry->d_inode, name, buffer, size);
+ info = SHMEM_I(dentry->d_inode);
+
+ spin_lock(&info->lock);
+ list_for_each_entry(xattr, &info->xattr_list, list) {
+ if (strcmp(name, xattr->name))
+ continue;
+
+ ret = xattr->size;
+ if (buffer) {
+ if (size < xattr->size)
+ ret = -ERANGE;
+ else
+ memcpy(buffer, xattr->value, xattr->size);
+ }
+ break;
+ }
+ spin_unlock(&info->lock);
+ return ret;
}
-static int shmem_xattr_security_set(struct dentry *dentry, const char *name,
- const void *value, size_t size, int flags, int handler_flags)
+static int shmem_xattr_set(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags)
{
- if (strcmp(name, "") == 0)
- return -EINVAL;
- return security_inode_setsecurity(dentry->d_inode, name, value,
- size, flags);
+ struct inode *inode = dentry->d_inode;
+ struct shmem_inode_info *info = SHMEM_I(inode);
+ struct shmem_xattr *xattr;
+ struct shmem_xattr *new_xattr = NULL;
+ size_t len;
+ int err = 0;
+
+ /* value == NULL means remove */
+ if (value) {
+ /* wrap around? */
+ len = sizeof(*new_xattr) + size;
+ if (len <= sizeof(*new_xattr))
+ return -ENOMEM;
+
+ new_xattr = kmalloc(len, GFP_KERNEL);
+ if (!new_xattr)
+ return -ENOMEM;
+
+ new_xattr->name = kstrdup(name, GFP_KERNEL);
+ if (!new_xattr->name) {
+ kfree(new_xattr);
+ return -ENOMEM;
+ }
+
+ new_xattr->size = size;
+ memcpy(new_xattr->value, value, size);
+ }
+
+ spin_lock(&info->lock);
+ list_for_each_entry(xattr, &info->xattr_list, list) {
+ if (!strcmp(name, xattr->name)) {
+ if (flags & XATTR_CREATE) {
+ xattr = new_xattr;
+ err = -EEXIST;
+ } else if (new_xattr) {
+ list_replace(&xattr->list, &new_xattr->list);
+ } else {
+ list_del(&xattr->list);
+ }
+ goto out;
+ }
+ }
+ if (flags & XATTR_REPLACE) {
+ xattr = new_xattr;
+ err = -ENODATA;
+ } else {
+ list_add(&new_xattr->list, &info->xattr_list);
+ xattr = NULL;
+ }
+out:
+ spin_unlock(&info->lock);
+ if (xattr)
+ kfree(xattr->name);
+ kfree(xattr);
+ return err;
}
-static const struct xattr_handler shmem_xattr_security_handler = {
- .prefix = XATTR_SECURITY_PREFIX,
- .list = shmem_xattr_security_list,
- .get = shmem_xattr_security_get,
- .set = shmem_xattr_security_set,
-};
static const struct xattr_handler *shmem_xattr_handlers[] = {
+#ifdef CONFIG_TMPFS_POSIX_ACL
&generic_acl_access_handler,
&generic_acl_default_handler,
- &shmem_xattr_security_handler,
+#endif
NULL
};
+
+static int shmem_xattr_validate(const char *name)
+{
+ struct { const char *prefix; size_t len; } arr[] = {
+ { XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN },
+ { XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN }
+ };
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(arr); i++) {
+ size_t preflen = arr[i].len;
+ if (strncmp(name, arr[i].prefix, preflen) == 0) {
+ if (!name[preflen])
+ return -EINVAL;
+ return 0;
+ }
+ }
+ return -EOPNOTSUPP;
+}
+
+static ssize_t shmem_getxattr(struct dentry *dentry, const char *name,
+ void *buffer, size_t size)
+{
+ int err;
+
+ /*
+ * If this is a request for a synthetic attribute in the system.*
+ * namespace use the generic infrastructure to resolve a handler
+ * for it via sb->s_xattr.
+ */
+ if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
+ return generic_getxattr(dentry, name, buffer, size);
+
+ err = shmem_xattr_validate(name);
+ if (err)
+ return err;
+
+ return shmem_xattr_get(dentry, name, buffer, size);
+}
+
+static int shmem_setxattr(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags)
+{
+ int err;
+
+ /*
+ * If this is a request for a synthetic attribute in the system.*
+ * namespace use the generic infrastructure to resolve a handler
+ * for it via sb->s_xattr.
+ */
+ if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
+ return generic_setxattr(dentry, name, value, size, flags);
+
+ err = shmem_xattr_validate(name);
+ if (err)
+ return err;
+
+ if (size == 0)
+ value = ""; /* empty EA, do not remove */
+
+ return shmem_xattr_set(dentry, name, value, size, flags);
+
+}
+
+static int shmem_removexattr(struct dentry *dentry, const char *name)
+{
+ int err;
+
+ /*
+ * If this is a request for a synthetic attribute in the system.*
+ * namespace use the generic infrastructure to resolve a handler
+ * for it via sb->s_xattr.
+ */
+ if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
+ return generic_removexattr(dentry, name);
+
+ err = shmem_xattr_validate(name);
+ if (err)
+ return err;
+
+ return shmem_xattr_set(dentry, name, NULL, 0, XATTR_REPLACE);
+}
+
+static bool xattr_is_trusted(const char *name)
+{
+ return !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN);
+}
+
+static ssize_t shmem_listxattr(struct dentry *dentry, char *buffer, size_t size)
+{
+ bool trusted = capable(CAP_SYS_ADMIN);
+ struct shmem_xattr *xattr;
+ struct shmem_inode_info *info;
+ size_t used = 0;
+
+ info = SHMEM_I(dentry->d_inode);
+
+ spin_lock(&info->lock);
+ list_for_each_entry(xattr, &info->xattr_list, list) {
+ size_t len;
+
+ /* skip "trusted." attributes for unprivileged callers */
+ if (!trusted && xattr_is_trusted(xattr->name))
+ continue;
+
+ len = strlen(xattr->name) + 1;
+ used += len;
+ if (buffer) {
+ if (size < used) {
+ used = -ERANGE;
+ break;
+ }
+ memcpy(buffer, xattr->name, len);
+ buffer += len;
+ }
+ }
+ spin_unlock(&info->lock);
+
+ return used;
+}
+#endif /* CONFIG_TMPFS_XATTR */
+
+static const struct inode_operations shmem_symlink_inline_operations = {
+ .readlink = generic_readlink,
+ .follow_link = shmem_follow_link_inline,
+#ifdef CONFIG_TMPFS_XATTR
+ .setxattr = shmem_setxattr,
+ .getxattr = shmem_getxattr,
+ .listxattr = shmem_listxattr,
+ .removexattr = shmem_removexattr,
+#endif
+};
+
+static const struct inode_operations shmem_symlink_inode_operations = {
+ .readlink = generic_readlink,
+ .follow_link = shmem_follow_link,
+ .put_link = shmem_put_link,
+#ifdef CONFIG_TMPFS_XATTR
+ .setxattr = shmem_setxattr,
+ .getxattr = shmem_getxattr,
+ .listxattr = shmem_listxattr,
+ .removexattr = shmem_removexattr,
#endif
+};
static struct dentry *shmem_get_parent(struct dentry *child)
{
@@ -2401,8 +2606,10 @@ int shmem_fill_super(struct super_block *sb, void *data, int silent)
sb->s_magic = TMPFS_MAGIC;
sb->s_op = &shmem_ops;
sb->s_time_gran = 1;
-#ifdef CONFIG_TMPFS_POSIX_ACL
+#ifdef CONFIG_TMPFS_XATTR
sb->s_xattr = shmem_xattr_handlers;
+#endif
+#ifdef CONFIG_TMPFS_POSIX_ACL
sb->s_flags |= MS_POSIXACL;
#endif
@@ -2500,11 +2707,13 @@ static const struct file_operations shmem_file_operations = {
static const struct inode_operations shmem_inode_operations = {
.setattr = shmem_notify_change,
.truncate_range = shmem_truncate_range,
+#ifdef CONFIG_TMPFS_XATTR
+ .setxattr = shmem_setxattr,
+ .getxattr = shmem_getxattr,
+ .listxattr = shmem_listxattr,
+ .removexattr = shmem_removexattr,
+#endif
#ifdef CONFIG_TMPFS_POSIX_ACL
- .setxattr = generic_setxattr,
- .getxattr = generic_getxattr,
- .listxattr = generic_listxattr,
- .removexattr = generic_removexattr,
.check_acl = generic_check_acl,
#endif
@@ -2522,23 +2731,27 @@ static const struct inode_operations shmem_dir_inode_operations = {
.mknod = shmem_mknod,
.rename = shmem_rename,
#endif
+#ifdef CONFIG_TMPFS_XATTR
+ .setxattr = shmem_setxattr,
+ .getxattr = shmem_getxattr,
+ .listxattr = shmem_listxattr,
+ .removexattr = shmem_removexattr,
+#endif
#ifdef CONFIG_TMPFS_POSIX_ACL
.setattr = shmem_notify_change,
- .setxattr = generic_setxattr,
- .getxattr = generic_getxattr,
- .listxattr = generic_listxattr,
- .removexattr = generic_removexattr,
.check_acl = generic_check_acl,
#endif
};
static const struct inode_operations shmem_special_inode_operations = {
+#ifdef CONFIG_TMPFS_XATTR
+ .setxattr = shmem_setxattr,
+ .getxattr = shmem_getxattr,
+ .listxattr = shmem_listxattr,
+ .removexattr = shmem_removexattr,
+#endif
#ifdef CONFIG_TMPFS_POSIX_ACL
.setattr = shmem_notify_change,
- .setxattr = generic_setxattr,
- .getxattr = generic_getxattr,
- .listxattr = generic_listxattr,
- .removexattr = generic_removexattr,
.check_acl = generic_check_acl,
#endif
};
diff --git a/mm/slab.c b/mm/slab.c
index 46a9c163a92f..bcfa4987c8ae 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -115,6 +115,7 @@
#include <linux/debugobjects.h>
#include <linux/kmemcheck.h>
#include <linux/memory.h>
+#include <linux/prefetch.h>
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
diff --git a/mm/slub.c b/mm/slub.c
index 9d2e5e46bf09..4aad32d2e60d 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -261,6 +261,18 @@ static inline void *get_freepointer(struct kmem_cache *s, void *object)
return *(void **)(object + s->offset);
}
+static inline void *get_freepointer_safe(struct kmem_cache *s, void *object)
+{
+ void *p;
+
+#ifdef CONFIG_DEBUG_PAGEALLOC
+ probe_kernel_read(&p, (void **)(object + s->offset), sizeof(p));
+#else
+ p = get_freepointer(s, object);
+#endif
+ return p;
+}
+
static inline void set_freepointer(struct kmem_cache *s, void *object, void *fp)
{
*(void **)(object + s->offset) = fp;
@@ -271,10 +283,6 @@ static inline void set_freepointer(struct kmem_cache *s, void *object, void *fp)
for (__p = (__addr); __p < (__addr) + (__objects) * (__s)->size;\
__p += (__s)->size)
-/* Scan freelist */
-#define for_each_free_object(__p, __s, __free) \
- for (__p = (__free); __p; __p = get_freepointer((__s), __p))
-
/* Determine object index from a given position */
static inline int slab_index(void *p, struct kmem_cache *s, void *addr)
{
@@ -332,6 +340,21 @@ static inline int oo_objects(struct kmem_cache_order_objects x)
#ifdef CONFIG_SLUB_DEBUG
/*
+ * Determine a map of object in use on a page.
+ *
+ * Slab lock or node listlock must be held to guarantee that the page does
+ * not vanish from under us.
+ */
+static void get_map(struct kmem_cache *s, struct page *page, unsigned long *map)
+{
+ void *p;
+ void *addr = page_address(page);
+
+ for (p = page->freelist; p; p = get_freepointer(s, p))
+ set_bit(slab_index(p, s, addr), map);
+}
+
+/*
* Debug settings:
*/
#ifdef CONFIG_SLUB_DEBUG_ON
@@ -1487,7 +1510,7 @@ static struct page *get_partial(struct kmem_cache *s, gfp_t flags, int node)
int searchnode = (node == NUMA_NO_NODE) ? numa_node_id() : node;
page = get_partial_node(get_node(s, searchnode));
- if (page || node != -1)
+ if (page || node != NUMA_NO_NODE)
return page;
return get_any_partial(s, flags);
@@ -1540,7 +1563,6 @@ static void unfreeze_slab(struct kmem_cache *s, struct page *page, int tail)
}
}
-#ifdef CONFIG_CMPXCHG_LOCAL
#ifdef CONFIG_PREEMPT
/*
* Calculate the next globally unique transaction for disambiguiation
@@ -1600,17 +1622,12 @@ static inline void note_cmpxchg_failure(const char *n,
stat(s, CMPXCHG_DOUBLE_CPU_FAIL);
}
-#endif
-
void init_kmem_cache_cpus(struct kmem_cache *s)
{
-#ifdef CONFIG_CMPXCHG_LOCAL
int cpu;
for_each_possible_cpu(cpu)
per_cpu_ptr(s->cpu_slab, cpu)->tid = init_tid(cpu);
-#endif
-
}
/*
* Remove the cpu slab
@@ -1643,9 +1660,7 @@ static void deactivate_slab(struct kmem_cache *s, struct kmem_cache_cpu *c)
page->inuse--;
}
c->page = NULL;
-#ifdef CONFIG_CMPXCHG_LOCAL
c->tid = next_tid(c->tid);
-#endif
unfreeze_slab(s, page, tail);
}
@@ -1779,8 +1794,7 @@ static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
unsigned long addr, struct kmem_cache_cpu *c)
{
void **object;
- struct page *new;
-#ifdef CONFIG_CMPXCHG_LOCAL
+ struct page *page;
unsigned long flags;
local_irq_save(flags);
@@ -1792,37 +1806,35 @@ static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
*/
c = this_cpu_ptr(s->cpu_slab);
#endif
-#endif
/* We handle __GFP_ZERO in the caller */
gfpflags &= ~__GFP_ZERO;
- if (!c->page)
+ page = c->page;
+ if (!page)
goto new_slab;
- slab_lock(c->page);
+ slab_lock(page);
if (unlikely(!node_match(c, node)))
goto another_slab;
stat(s, ALLOC_REFILL);
load_freelist:
- object = c->page->freelist;
+ object = page->freelist;
if (unlikely(!object))
goto another_slab;
if (kmem_cache_debug(s))
goto debug;
c->freelist = get_freepointer(s, object);
- c->page->inuse = c->page->objects;
- c->page->freelist = NULL;
- c->node = page_to_nid(c->page);
+ page->inuse = page->objects;
+ page->freelist = NULL;
+
unlock_out:
- slab_unlock(c->page);
-#ifdef CONFIG_CMPXCHG_LOCAL
+ slab_unlock(page);
c->tid = next_tid(c->tid);
local_irq_restore(flags);
-#endif
stat(s, ALLOC_SLOWPATH);
return object;
@@ -1830,10 +1842,11 @@ another_slab:
deactivate_slab(s, c);
new_slab:
- new = get_partial(s, gfpflags, node);
- if (new) {
- c->page = new;
+ page = get_partial(s, gfpflags, node);
+ if (page) {
stat(s, ALLOC_FROM_PARTIAL);
+ c->node = page_to_nid(page);
+ c->page = page;
goto load_freelist;
}
@@ -1841,35 +1854,38 @@ new_slab:
if (gfpflags & __GFP_WAIT)
local_irq_enable();
- new = new_slab(s, gfpflags, node);
+ page = new_slab(s, gfpflags, node);
if (gfpflags & __GFP_WAIT)
local_irq_disable();
- if (new) {
+ if (page) {
c = __this_cpu_ptr(s->cpu_slab);
stat(s, ALLOC_SLAB);
if (c->page)
flush_slab(s, c);
- slab_lock(new);
- __SetPageSlubFrozen(new);
- c->page = new;
+
+ slab_lock(page);
+ __SetPageSlubFrozen(page);
+ c->node = page_to_nid(page);
+ c->page = page;
goto load_freelist;
}
if (!(gfpflags & __GFP_NOWARN) && printk_ratelimit())
slab_out_of_memory(s, gfpflags, node);
-#ifdef CONFIG_CMPXCHG_LOCAL
local_irq_restore(flags);
-#endif
return NULL;
debug:
- if (!alloc_debug_processing(s, c->page, object, addr))
+ if (!alloc_debug_processing(s, page, object, addr))
goto another_slab;
- c->page->inuse++;
- c->page->freelist = get_freepointer(s, object);
+ page->inuse++;
+ page->freelist = get_freepointer(s, object);
+ deactivate_slab(s, c);
+ c->page = NULL;
c->node = NUMA_NO_NODE;
- goto unlock_out;
+ local_irq_restore(flags);
+ return object;
}
/*
@@ -1887,20 +1903,12 @@ static __always_inline void *slab_alloc(struct kmem_cache *s,
{
void **object;
struct kmem_cache_cpu *c;
-#ifdef CONFIG_CMPXCHG_LOCAL
unsigned long tid;
-#else
- unsigned long flags;
-#endif
if (slab_pre_alloc_hook(s, gfpflags))
return NULL;
-#ifndef CONFIG_CMPXCHG_LOCAL
- local_irq_save(flags);
-#else
redo:
-#endif
/*
* Must read kmem_cache cpu data via this cpu ptr. Preemption is
@@ -1910,7 +1918,6 @@ redo:
*/
c = __this_cpu_ptr(s->cpu_slab);
-#ifdef CONFIG_CMPXCHG_LOCAL
/*
* The transaction ids are globally unique per cpu and per operation on
* a per cpu queue. Thus they can be guarantee that the cmpxchg_double
@@ -1919,7 +1926,6 @@ redo:
*/
tid = c->tid;
barrier();
-#endif
object = c->freelist;
if (unlikely(!object || !node_match(c, node)))
@@ -1927,7 +1933,6 @@ redo:
object = __slab_alloc(s, gfpflags, node, addr, c);
else {
-#ifdef CONFIG_CMPXCHG_LOCAL
/*
* The cmpxchg will only match if there was no additional
* operation and if we are on the right processor.
@@ -1943,21 +1948,14 @@ redo:
if (unlikely(!irqsafe_cpu_cmpxchg_double(
s->cpu_slab->freelist, s->cpu_slab->tid,
object, tid,
- get_freepointer(s, object), next_tid(tid)))) {
+ get_freepointer_safe(s, object), next_tid(tid)))) {
note_cmpxchg_failure("slab_alloc", s, tid);
goto redo;
}
-#else
- c->freelist = get_freepointer(s, object);
-#endif
stat(s, ALLOC_FASTPATH);
}
-#ifndef CONFIG_CMPXCHG_LOCAL
- local_irq_restore(flags);
-#endif
-
if (unlikely(gfpflags & __GFP_ZERO) && object)
memset(object, 0, s->objsize);
@@ -2034,18 +2032,15 @@ static void __slab_free(struct kmem_cache *s, struct page *page,
{
void *prior;
void **object = (void *)x;
-#ifdef CONFIG_CMPXCHG_LOCAL
unsigned long flags;
local_irq_save(flags);
-#endif
slab_lock(page);
stat(s, FREE_SLOWPATH);
- if (kmem_cache_debug(s))
- goto debug;
+ if (kmem_cache_debug(s) && !free_debug_processing(s, page, x, addr))
+ goto out_unlock;
-checks_ok:
prior = page->freelist;
set_freepointer(s, object, prior);
page->freelist = object;
@@ -2070,9 +2065,7 @@ checks_ok:
out_unlock:
slab_unlock(page);
-#ifdef CONFIG_CMPXCHG_LOCAL
local_irq_restore(flags);
-#endif
return;
slab_empty:
@@ -2084,17 +2077,9 @@ slab_empty:
stat(s, FREE_REMOVE_PARTIAL);
}
slab_unlock(page);
-#ifdef CONFIG_CMPXCHG_LOCAL
local_irq_restore(flags);
-#endif
stat(s, FREE_SLAB);
discard_slab(s, page);
- return;
-
-debug:
- if (!free_debug_processing(s, page, x, addr))
- goto out_unlock;
- goto checks_ok;
}
/*
@@ -2113,20 +2098,11 @@ static __always_inline void slab_free(struct kmem_cache *s,
{
void **object = (void *)x;
struct kmem_cache_cpu *c;
-#ifdef CONFIG_CMPXCHG_LOCAL
unsigned long tid;
-#else
- unsigned long flags;
-#endif
slab_free_hook(s, x);
-#ifndef CONFIG_CMPXCHG_LOCAL
- local_irq_save(flags);
-
-#else
redo:
-#endif
/*
* Determine the currently cpus per cpu slab.
@@ -2136,15 +2112,12 @@ redo:
*/
c = __this_cpu_ptr(s->cpu_slab);
-#ifdef CONFIG_CMPXCHG_LOCAL
tid = c->tid;
barrier();
-#endif
- if (likely(page == c->page && c->node != NUMA_NO_NODE)) {
+ if (likely(page == c->page)) {
set_freepointer(s, object, c->freelist);
-#ifdef CONFIG_CMPXCHG_LOCAL
if (unlikely(!irqsafe_cpu_cmpxchg_double(
s->cpu_slab->freelist, s->cpu_slab->tid,
c->freelist, tid,
@@ -2153,16 +2126,10 @@ redo:
note_cmpxchg_failure("slab_free", s, tid);
goto redo;
}
-#else
- c->freelist = object;
-#endif
stat(s, FREE_FASTPATH);
} else
__slab_free(s, page, x, addr);
-#ifndef CONFIG_CMPXCHG_LOCAL
- local_irq_restore(flags);
-#endif
}
void kmem_cache_free(struct kmem_cache *s, void *x)
@@ -2673,9 +2640,8 @@ static void list_slab_objects(struct kmem_cache *s, struct page *page,
return;
slab_err(s, page, "%s", text);
slab_lock(page);
- for_each_free_object(p, s, page->freelist)
- set_bit(slab_index(p, s, addr), map);
+ get_map(s, page, map);
for_each_object(p, s, addr, page->objects) {
if (!test_bit(slab_index(p, s, addr), map)) {
@@ -3203,7 +3169,7 @@ static void __init kmem_cache_bootstrap_fixup(struct kmem_cache *s)
list_for_each_entry(p, &n->partial, lru)
p->slab = s;
-#ifdef CONFIG_SLAB_DEBUG
+#ifdef CONFIG_SLUB_DEBUG
list_for_each_entry(p, &n->full, lru)
p->slab = s;
#endif
@@ -3610,10 +3576,11 @@ static int validate_slab(struct kmem_cache *s, struct page *page,
/* Now we know that a valid freelist exists */
bitmap_zero(map, page->objects);
- for_each_free_object(p, s, page->freelist) {
- set_bit(slab_index(p, s, addr), map);
- if (!check_object(s, page, p, SLUB_RED_INACTIVE))
- return 0;
+ get_map(s, page, map);
+ for_each_object(p, s, addr, page->objects) {
+ if (test_bit(slab_index(p, s, addr), map))
+ if (!check_object(s, page, p, SLUB_RED_INACTIVE))
+ return 0;
}
for_each_object(p, s, addr, page->objects)
@@ -3821,8 +3788,7 @@ static void process_slab(struct loc_track *t, struct kmem_cache *s,
void *p;
bitmap_zero(map, page->objects);
- for_each_free_object(p, s, page->freelist)
- set_bit(slab_index(p, s, addr), map);
+ get_map(s, page, map);
for_each_object(p, s, addr, page->objects)
if (!test_bit(slab_index(p, s, addr), map))
diff --git a/mm/swap.c b/mm/swap.c
index 5602f1a1b1e7..3a442f18b0b3 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -272,14 +272,10 @@ static void update_page_reclaim_stat(struct zone *zone, struct page *page,
memcg_reclaim_stat->recent_rotated[file]++;
}
-/*
- * FIXME: speed this up?
- */
-void activate_page(struct page *page)
+static void __activate_page(struct page *page, void *arg)
{
struct zone *zone = page_zone(page);
- spin_lock_irq(&zone->lru_lock);
if (PageLRU(page) && !PageActive(page) && !PageUnevictable(page)) {
int file = page_is_file_cache(page);
int lru = page_lru_base_type(page);
@@ -292,8 +288,45 @@ void activate_page(struct page *page)
update_page_reclaim_stat(zone, page, file, 1);
}
+}
+
+#ifdef CONFIG_SMP
+static DEFINE_PER_CPU(struct pagevec, activate_page_pvecs);
+
+static void activate_page_drain(int cpu)
+{
+ struct pagevec *pvec = &per_cpu(activate_page_pvecs, cpu);
+
+ if (pagevec_count(pvec))
+ pagevec_lru_move_fn(pvec, __activate_page, NULL);
+}
+
+void activate_page(struct page *page)
+{
+ if (PageLRU(page) && !PageActive(page) && !PageUnevictable(page)) {
+ struct pagevec *pvec = &get_cpu_var(activate_page_pvecs);
+
+ page_cache_get(page);
+ if (!pagevec_add(pvec, page))
+ pagevec_lru_move_fn(pvec, __activate_page, NULL);
+ put_cpu_var(activate_page_pvecs);
+ }
+}
+
+#else
+static inline void activate_page_drain(int cpu)
+{
+}
+
+void activate_page(struct page *page)
+{
+ struct zone *zone = page_zone(page);
+
+ spin_lock_irq(&zone->lru_lock);
+ __activate_page(page, NULL);
spin_unlock_irq(&zone->lru_lock);
}
+#endif
/*
* Mark a page as having seen activity.
@@ -464,6 +497,8 @@ static void drain_cpu_pagevecs(int cpu)
pvec = &per_cpu(lru_deactivate_pvecs, cpu);
if (pagevec_count(pvec))
pagevec_lru_move_fn(pvec, lru_deactivate_fn, NULL);
+
+ activate_page_drain(cpu);
}
/**
@@ -476,6 +511,13 @@ static void drain_cpu_pagevecs(int cpu)
*/
void deactivate_page(struct page *page)
{
+ /*
+ * In a workload with many unevictable page such as mprotect, unevictable
+ * page deactivation for accelerating reclaim is pointless.
+ */
+ if (PageUnevictable(page))
+ return;
+
if (likely(get_page_unless_zero(page))) {
struct pagevec *pvec = &get_cpu_var(lru_deactivate_pvecs);
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 8c6b3ce38f09..d537d29e9b7b 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -31,6 +31,7 @@
#include <linux/syscalls.h>
#include <linux/memcontrol.h>
#include <linux/poll.h>
+#include <linux/oom.h>
#include <asm/pgtable.h>
#include <asm/tlbflush.h>
@@ -1555,6 +1556,7 @@ SYSCALL_DEFINE1(swapoff, const char __user *, specialfile)
struct address_space *mapping;
struct inode *inode;
char *pathname;
+ int oom_score_adj;
int i, type, prev;
int err;
@@ -1613,9 +1615,9 @@ SYSCALL_DEFINE1(swapoff, const char __user *, specialfile)
p->flags &= ~SWP_WRITEOK;
spin_unlock(&swap_lock);
- current->flags |= PF_OOM_ORIGIN;
+ oom_score_adj = test_set_oom_score_adj(OOM_SCORE_ADJ_MAX);
err = try_to_unuse(type);
- current->flags &= ~PF_OOM_ORIGIN;
+ test_set_oom_score_adj(oom_score_adj);
if (err) {
/*
diff --git a/mm/util.c b/mm/util.c
index e7b103a6fd21..88ea1bd661c0 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -6,6 +6,8 @@
#include <linux/sched.h>
#include <asm/uaccess.h>
+#include "internal.h"
+
#define CREATE_TRACE_POINTS
#include <trace/events/kmem.h>
@@ -215,6 +217,28 @@ char *strndup_user(const char __user *s, long n)
}
EXPORT_SYMBOL(strndup_user);
+void __vma_link_list(struct mm_struct *mm, struct vm_area_struct *vma,
+ struct vm_area_struct *prev, struct rb_node *rb_parent)
+{
+ struct vm_area_struct *next;
+
+ vma->vm_prev = prev;
+ if (prev) {
+ next = prev->vm_next;
+ prev->vm_next = vma;
+ } else {
+ mm->mmap = vma;
+ if (rb_parent)
+ next = rb_entry(rb_parent,
+ struct vm_area_struct, vm_rb);
+ else
+ next = NULL;
+ }
+ vma->vm_next = next;
+ if (next)
+ next->vm_prev = vma;
+}
+
#if defined(CONFIG_MMU) && !defined(HAVE_ARCH_PICK_MMAP_LAYOUT)
void arch_pick_mmap_layout(struct mm_struct *mm)
{
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 5d6030235d7a..b5ccf3158d82 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -375,7 +375,7 @@ nocache:
/* find starting point for our search */
if (free_vmap_cache) {
first = rb_entry(free_vmap_cache, struct vmap_area, rb_node);
- addr = ALIGN(first->va_end + PAGE_SIZE, align);
+ addr = ALIGN(first->va_end, align);
if (addr < vstart)
goto nocache;
if (addr + size - 1 < addr)
@@ -406,10 +406,10 @@ nocache:
}
/* from the starting point, walk areas until a suitable hole is found */
- while (addr + size >= first->va_start && addr + size <= vend) {
+ while (addr + size > first->va_start && addr + size <= vend) {
if (addr + cached_hole_size < first->va_start)
cached_hole_size = first->va_start - addr;
- addr = ALIGN(first->va_end + PAGE_SIZE, align);
+ addr = ALIGN(first->va_end, align);
if (addr + size - 1 < addr)
goto overflow;
@@ -1534,6 +1534,7 @@ static void *__vmalloc_node(unsigned long size, unsigned long align,
static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
pgprot_t prot, int node, void *caller)
{
+ const int order = 0;
struct page **pages;
unsigned int nr_pages, array_size, i;
gfp_t nested_gfp = (gfp_mask & GFP_RECLAIM_MASK) | __GFP_ZERO;
@@ -1560,11 +1561,12 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
for (i = 0; i < area->nr_pages; i++) {
struct page *page;
+ gfp_t tmp_mask = gfp_mask | __GFP_NOWARN;
if (node < 0)
- page = alloc_page(gfp_mask);
+ page = alloc_page(tmp_mask);
else
- page = alloc_pages_node(node, gfp_mask, 0);
+ page = alloc_pages_node(node, tmp_mask, order);
if (unlikely(!page)) {
/* Successfully allocated i pages, free them in __vunmap() */
@@ -1579,6 +1581,9 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
return area->addr;
fail:
+ warn_alloc_failed(gfp_mask, order, "vmalloc: allocation failure, "
+ "allocated %ld of %ld bytes\n",
+ (area->nr_pages*PAGE_SIZE), area->size);
vfree(area->addr);
return NULL;
}
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 8bfd45050a61..7e0116150dc7 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -42,6 +42,7 @@
#include <linux/delayacct.h>
#include <linux/sysctl.h>
#include <linux/oom.h>
+#include <linux/prefetch.h>
#include <asm/tlbflush.h>
#include <asm/div64.h>
@@ -201,6 +202,14 @@ void unregister_shrinker(struct shrinker *shrinker)
}
EXPORT_SYMBOL(unregister_shrinker);
+static inline int do_shrinker_shrink(struct shrinker *shrinker,
+ struct shrink_control *sc,
+ unsigned long nr_to_scan)
+{
+ sc->nr_to_scan = nr_to_scan;
+ return (*shrinker->shrink)(shrinker, sc);
+}
+
#define SHRINK_BATCH 128
/*
* Call the shrink functions to age shrinkable caches
@@ -221,25 +230,29 @@ EXPORT_SYMBOL(unregister_shrinker);
*
* Returns the number of slab objects which we shrunk.
*/
-unsigned long shrink_slab(unsigned long scanned, gfp_t gfp_mask,
- unsigned long lru_pages)
+unsigned long shrink_slab(struct shrink_control *shrink,
+ unsigned long nr_pages_scanned,
+ unsigned long lru_pages)
{
struct shrinker *shrinker;
unsigned long ret = 0;
- if (scanned == 0)
- scanned = SWAP_CLUSTER_MAX;
+ if (nr_pages_scanned == 0)
+ nr_pages_scanned = SWAP_CLUSTER_MAX;
- if (!down_read_trylock(&shrinker_rwsem))
- return 1; /* Assume we'll be able to shrink next time */
+ if (!down_read_trylock(&shrinker_rwsem)) {
+ /* Assume we'll be able to shrink next time */
+ ret = 1;
+ goto out;
+ }
list_for_each_entry(shrinker, &shrinker_list, list) {
unsigned long long delta;
unsigned long total_scan;
unsigned long max_pass;
- max_pass = (*shrinker->shrink)(shrinker, 0, gfp_mask);
- delta = (4 * scanned) / shrinker->seeks;
+ max_pass = do_shrinker_shrink(shrinker, shrink, 0);
+ delta = (4 * nr_pages_scanned) / shrinker->seeks;
delta *= max_pass;
do_div(delta, lru_pages + 1);
shrinker->nr += delta;
@@ -266,9 +279,9 @@ unsigned long shrink_slab(unsigned long scanned, gfp_t gfp_mask,
int shrink_ret;
int nr_before;
- nr_before = (*shrinker->shrink)(shrinker, 0, gfp_mask);
- shrink_ret = (*shrinker->shrink)(shrinker, this_scan,
- gfp_mask);
+ nr_before = do_shrinker_shrink(shrinker, shrink, 0);
+ shrink_ret = do_shrinker_shrink(shrinker, shrink,
+ this_scan);
if (shrink_ret == -1)
break;
if (shrink_ret < nr_before)
@@ -282,6 +295,8 @@ unsigned long shrink_slab(unsigned long scanned, gfp_t gfp_mask,
shrinker->nr += total_scan;
}
up_read(&shrinker_rwsem);
+out:
+ cond_resched();
return ret;
}
@@ -1201,13 +1216,16 @@ int isolate_lru_page(struct page *page)
{
int ret = -EBUSY;
+ VM_BUG_ON(!page_count(page));
+
if (PageLRU(page)) {
struct zone *zone = page_zone(page);
spin_lock_irq(&zone->lru_lock);
- if (PageLRU(page) && get_page_unless_zero(page)) {
+ if (PageLRU(page)) {
int lru = page_lru(page);
ret = 0;
+ get_page(page);
ClearPageLRU(page);
del_page_from_lru_list(zone, page, lru);
@@ -2026,7 +2044,8 @@ static bool all_unreclaimable(struct zonelist *zonelist,
* else, the number of pages reclaimed
*/
static unsigned long do_try_to_free_pages(struct zonelist *zonelist,
- struct scan_control *sc)
+ struct scan_control *sc,
+ struct shrink_control *shrink)
{
int priority;
unsigned long total_scanned = 0;
@@ -2060,7 +2079,7 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist,
lru_pages += zone_reclaimable_pages(zone);
}
- shrink_slab(sc->nr_scanned, sc->gfp_mask, lru_pages);
+ shrink_slab(shrink, sc->nr_scanned, lru_pages);
if (reclaim_state) {
sc->nr_reclaimed += reclaim_state->reclaimed_slab;
reclaim_state->reclaimed_slab = 0;
@@ -2132,12 +2151,15 @@ unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
.mem_cgroup = NULL,
.nodemask = nodemask,
};
+ struct shrink_control shrink = {
+ .gfp_mask = sc.gfp_mask,
+ };
trace_mm_vmscan_direct_reclaim_begin(order,
sc.may_writepage,
gfp_mask);
- nr_reclaimed = do_try_to_free_pages(zonelist, &sc);
+ nr_reclaimed = do_try_to_free_pages(zonelist, &sc, &shrink);
trace_mm_vmscan_direct_reclaim_end(nr_reclaimed);
@@ -2197,17 +2219,20 @@ unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem_cont,
.order = 0,
.mem_cgroup = mem_cont,
.nodemask = NULL, /* we don't care the placement */
+ .gfp_mask = (gfp_mask & GFP_RECLAIM_MASK) |
+ (GFP_HIGHUSER_MOVABLE & ~GFP_RECLAIM_MASK),
+ };
+ struct shrink_control shrink = {
+ .gfp_mask = sc.gfp_mask,
};
- sc.gfp_mask = (gfp_mask & GFP_RECLAIM_MASK) |
- (GFP_HIGHUSER_MOVABLE & ~GFP_RECLAIM_MASK);
zonelist = NODE_DATA(numa_node_id())->node_zonelists;
trace_mm_vmscan_memcg_reclaim_begin(0,
sc.may_writepage,
sc.gfp_mask);
- nr_reclaimed = do_try_to_free_pages(zonelist, &sc);
+ nr_reclaimed = do_try_to_free_pages(zonelist, &sc, &shrink);
trace_mm_vmscan_memcg_reclaim_end(nr_reclaimed);
@@ -2286,7 +2311,7 @@ static bool sleeping_prematurely(pg_data_t *pgdat, int order, long remaining,
* must be balanced
*/
if (order)
- return pgdat_balanced(pgdat, balanced, classzone_idx);
+ return !pgdat_balanced(pgdat, balanced, classzone_idx);
else
return !all_zones_ok;
}
@@ -2335,6 +2360,9 @@ static unsigned long balance_pgdat(pg_data_t *pgdat, int order,
.order = order,
.mem_cgroup = NULL,
};
+ struct shrink_control shrink = {
+ .gfp_mask = sc.gfp_mask,
+ };
loop_again:
total_scanned = 0;
sc.nr_reclaimed = 0;
@@ -2434,8 +2462,7 @@ loop_again:
end_zone, 0))
shrink_zone(priority, zone, &sc);
reclaim_state->reclaimed_slab = 0;
- nr_slab = shrink_slab(sc.nr_scanned, GFP_KERNEL,
- lru_pages);
+ nr_slab = shrink_slab(&shrink, sc.nr_scanned, lru_pages);
sc.nr_reclaimed += reclaim_state->reclaimed_slab;
total_scanned += sc.nr_scanned;
@@ -2787,7 +2814,10 @@ unsigned long shrink_all_memory(unsigned long nr_to_reclaim)
.swappiness = vm_swappiness,
.order = 0,
};
- struct zonelist * zonelist = node_zonelist(numa_node_id(), sc.gfp_mask);
+ struct shrink_control shrink = {
+ .gfp_mask = sc.gfp_mask,
+ };
+ struct zonelist *zonelist = node_zonelist(numa_node_id(), sc.gfp_mask);
struct task_struct *p = current;
unsigned long nr_reclaimed;
@@ -2796,7 +2826,7 @@ unsigned long shrink_all_memory(unsigned long nr_to_reclaim)
reclaim_state.reclaimed_slab = 0;
p->reclaim_state = &reclaim_state;
- nr_reclaimed = do_try_to_free_pages(zonelist, &sc);
+ nr_reclaimed = do_try_to_free_pages(zonelist, &sc, &shrink);
p->reclaim_state = NULL;
lockdep_clear_current_reclaim_state();
@@ -2971,6 +3001,9 @@ static int __zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order)
.swappiness = vm_swappiness,
.order = order,
};
+ struct shrink_control shrink = {
+ .gfp_mask = sc.gfp_mask,
+ };
unsigned long nr_slab_pages0, nr_slab_pages1;
cond_resched();
@@ -3012,7 +3045,7 @@ static int __zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order)
unsigned long lru_pages = zone_reclaimable_pages(zone);
/* No reclaimable slab or very low memory pressure */
- if (!shrink_slab(sc.nr_scanned, gfp_mask, lru_pages))
+ if (!shrink_slab(&shrink, sc.nr_scanned, lru_pages))
break;
/* Freed enough memory */
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 897ea9e88238..20c18b7694b2 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -157,7 +157,7 @@ int calculate_normal_threshold(struct zone *zone)
/*
* Refresh the thresholds for each zone.
*/
-static void refresh_zone_stat_thresholds(void)
+void refresh_zone_stat_thresholds(void)
{
struct zone *zone;
int cpu;
@@ -659,6 +659,138 @@ static void walk_zones_in_node(struct seq_file *m, pg_data_t *pgdat,
}
#endif
+#if defined(CONFIG_PROC_FS) || defined(CONFIG_SYSFS)
+#ifdef CONFIG_ZONE_DMA
+#define TEXT_FOR_DMA(xx) xx "_dma",
+#else
+#define TEXT_FOR_DMA(xx)
+#endif
+
+#ifdef CONFIG_ZONE_DMA32
+#define TEXT_FOR_DMA32(xx) xx "_dma32",
+#else
+#define TEXT_FOR_DMA32(xx)
+#endif
+
+#ifdef CONFIG_HIGHMEM
+#define TEXT_FOR_HIGHMEM(xx) xx "_high",
+#else
+#define TEXT_FOR_HIGHMEM(xx)
+#endif
+
+#define TEXTS_FOR_ZONES(xx) TEXT_FOR_DMA(xx) TEXT_FOR_DMA32(xx) xx "_normal", \
+ TEXT_FOR_HIGHMEM(xx) xx "_movable",
+
+const char * const vmstat_text[] = {
+ /* Zoned VM counters */
+ "nr_free_pages",
+ "nr_inactive_anon",
+ "nr_active_anon",
+ "nr_inactive_file",
+ "nr_active_file",
+ "nr_unevictable",
+ "nr_mlock",
+ "nr_anon_pages",
+ "nr_mapped",
+ "nr_file_pages",
+ "nr_dirty",
+ "nr_writeback",
+ "nr_slab_reclaimable",
+ "nr_slab_unreclaimable",
+ "nr_page_table_pages",
+ "nr_kernel_stack",
+ "nr_unstable",
+ "nr_bounce",
+ "nr_vmscan_write",
+ "nr_writeback_temp",
+ "nr_isolated_anon",
+ "nr_isolated_file",
+ "nr_shmem",
+ "nr_dirtied",
+ "nr_written",
+
+#ifdef CONFIG_NUMA
+ "numa_hit",
+ "numa_miss",
+ "numa_foreign",
+ "numa_interleave",
+ "numa_local",
+ "numa_other",
+#endif
+ "nr_anon_transparent_hugepages",
+ "nr_dirty_threshold",
+ "nr_dirty_background_threshold",
+
+#ifdef CONFIG_VM_EVENT_COUNTERS
+ "pgpgin",
+ "pgpgout",
+ "pswpin",
+ "pswpout",
+
+ TEXTS_FOR_ZONES("pgalloc")
+
+ "pgfree",
+ "pgactivate",
+ "pgdeactivate",
+
+ "pgfault",
+ "pgmajfault",
+
+ TEXTS_FOR_ZONES("pgrefill")
+ TEXTS_FOR_ZONES("pgsteal")
+ TEXTS_FOR_ZONES("pgscan_kswapd")
+ TEXTS_FOR_ZONES("pgscan_direct")
+
+#ifdef CONFIG_NUMA
+ "zone_reclaim_failed",
+#endif
+ "pginodesteal",
+ "slabs_scanned",
+ "kswapd_steal",
+ "kswapd_inodesteal",
+ "kswapd_low_wmark_hit_quickly",
+ "kswapd_high_wmark_hit_quickly",
+ "kswapd_skip_congestion_wait",
+ "pageoutrun",
+ "allocstall",
+
+ "pgrotated",
+
+#ifdef CONFIG_COMPACTION
+ "compact_blocks_moved",
+ "compact_pages_moved",
+ "compact_pagemigrate_failed",
+ "compact_stall",
+ "compact_fail",
+ "compact_success",
+#endif
+
+#ifdef CONFIG_HUGETLB_PAGE
+ "htlb_buddy_alloc_success",
+ "htlb_buddy_alloc_fail",
+#endif
+ "unevictable_pgs_culled",
+ "unevictable_pgs_scanned",
+ "unevictable_pgs_rescued",
+ "unevictable_pgs_mlocked",
+ "unevictable_pgs_munlocked",
+ "unevictable_pgs_cleared",
+ "unevictable_pgs_stranded",
+ "unevictable_pgs_mlockfreed",
+
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+ "thp_fault_alloc",
+ "thp_fault_fallback",
+ "thp_collapse_alloc",
+ "thp_collapse_alloc_failed",
+ "thp_split",
+#endif
+
+#endif /* CONFIG_VM_EVENTS_COUNTERS */
+};
+#endif /* CONFIG_PROC_FS || CONFIG_SYSFS */
+
+
#ifdef CONFIG_PROC_FS
static void frag_show_print(struct seq_file *m, pg_data_t *pgdat,
struct zone *zone)
@@ -831,135 +963,6 @@ static const struct file_operations pagetypeinfo_file_ops = {
.release = seq_release,
};
-#ifdef CONFIG_ZONE_DMA
-#define TEXT_FOR_DMA(xx) xx "_dma",
-#else
-#define TEXT_FOR_DMA(xx)
-#endif
-
-#ifdef CONFIG_ZONE_DMA32
-#define TEXT_FOR_DMA32(xx) xx "_dma32",
-#else
-#define TEXT_FOR_DMA32(xx)
-#endif
-
-#ifdef CONFIG_HIGHMEM
-#define TEXT_FOR_HIGHMEM(xx) xx "_high",
-#else
-#define TEXT_FOR_HIGHMEM(xx)
-#endif
-
-#define TEXTS_FOR_ZONES(xx) TEXT_FOR_DMA(xx) TEXT_FOR_DMA32(xx) xx "_normal", \
- TEXT_FOR_HIGHMEM(xx) xx "_movable",
-
-static const char * const vmstat_text[] = {
- /* Zoned VM counters */
- "nr_free_pages",
- "nr_inactive_anon",
- "nr_active_anon",
- "nr_inactive_file",
- "nr_active_file",
- "nr_unevictable",
- "nr_mlock",
- "nr_anon_pages",
- "nr_mapped",
- "nr_file_pages",
- "nr_dirty",
- "nr_writeback",
- "nr_slab_reclaimable",
- "nr_slab_unreclaimable",
- "nr_page_table_pages",
- "nr_kernel_stack",
- "nr_unstable",
- "nr_bounce",
- "nr_vmscan_write",
- "nr_writeback_temp",
- "nr_isolated_anon",
- "nr_isolated_file",
- "nr_shmem",
- "nr_dirtied",
- "nr_written",
-
-#ifdef CONFIG_NUMA
- "numa_hit",
- "numa_miss",
- "numa_foreign",
- "numa_interleave",
- "numa_local",
- "numa_other",
-#endif
- "nr_anon_transparent_hugepages",
- "nr_dirty_threshold",
- "nr_dirty_background_threshold",
-
-#ifdef CONFIG_VM_EVENT_COUNTERS
- "pgpgin",
- "pgpgout",
- "pswpin",
- "pswpout",
-
- TEXTS_FOR_ZONES("pgalloc")
-
- "pgfree",
- "pgactivate",
- "pgdeactivate",
-
- "pgfault",
- "pgmajfault",
-
- TEXTS_FOR_ZONES("pgrefill")
- TEXTS_FOR_ZONES("pgsteal")
- TEXTS_FOR_ZONES("pgscan_kswapd")
- TEXTS_FOR_ZONES("pgscan_direct")
-
-#ifdef CONFIG_NUMA
- "zone_reclaim_failed",
-#endif
- "pginodesteal",
- "slabs_scanned",
- "kswapd_steal",
- "kswapd_inodesteal",
- "kswapd_low_wmark_hit_quickly",
- "kswapd_high_wmark_hit_quickly",
- "kswapd_skip_congestion_wait",
- "pageoutrun",
- "allocstall",
-
- "pgrotated",
-
-#ifdef CONFIG_COMPACTION
- "compact_blocks_moved",
- "compact_pages_moved",
- "compact_pagemigrate_failed",
- "compact_stall",
- "compact_fail",
- "compact_success",
-#endif
-
-#ifdef CONFIG_HUGETLB_PAGE
- "htlb_buddy_alloc_success",
- "htlb_buddy_alloc_fail",
-#endif
- "unevictable_pgs_culled",
- "unevictable_pgs_scanned",
- "unevictable_pgs_rescued",
- "unevictable_pgs_mlocked",
- "unevictable_pgs_munlocked",
- "unevictable_pgs_cleared",
- "unevictable_pgs_stranded",
- "unevictable_pgs_mlockfreed",
-
-#ifdef CONFIG_TRANSPARENT_HUGEPAGE
- "thp_fault_alloc",
- "thp_fault_fallback",
- "thp_collapse_alloc",
- "thp_collapse_alloc_failed",
- "thp_split",
-#endif
-
-#endif /* CONFIG_VM_EVENTS_COUNTERS */
-};
-
static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat,
struct zone *zone)
{
@@ -1198,7 +1201,6 @@ static int __init setup_vmstat(void)
#ifdef CONFIG_SMP
int cpu;
- refresh_zone_stat_thresholds();
register_cpu_notifier(&vmstat_notifier);
for_each_online_cpu(cpu)
generated by cgit v1.2.3 (git 2.0.4) at 2024-06-06 10:24:17 +0000