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authorAndrea Arcangeli <aarcange@redhat.com>2011-01-13 15:47:05 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-13 17:32:45 -0800
commit0bbbc0b33d141f78a0d9218a54a47f50621220d3 (patch)
tree3ef3363c189ac536926119731eb86dcf989f4adb /mm/mempolicy.c
parentd39d33c332c611094f84cee39715866f4cbf79e2 (diff)
thp: add numa awareness to hugepage allocations
It's mostly a matter of replacing alloc_pages with alloc_pages_vma after introducing alloc_pages_vma. khugepaged needs special handling as the allocation has to happen inside collapse_huge_page where the vma is known and an error has to be returned to the outer loop to sleep alloc_sleep_millisecs in case of failure. But it retains the more efficient logic of handling allocation failures in khugepaged in case of CONFIG_NUMA=n. Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/mempolicy.c')
-rw-r--r--mm/mempolicy.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 83b7df309fc4..368fc9d23610 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1796,7 +1796,7 @@ static struct page *alloc_page_interleave(gfp_t gfp, unsigned order,
}
/**
- * alloc_page_vma - Allocate a page for a VMA.
+ * alloc_pages_vma - Allocate a page for a VMA.
*
* @gfp:
* %GFP_USER user allocation.
@@ -1805,6 +1805,7 @@ static struct page *alloc_page_interleave(gfp_t gfp, unsigned order,
* %GFP_FS allocation should not call back into a file system.
* %GFP_ATOMIC don't sleep.
*
+ * @order:Order of the GFP allocation.
* @vma: Pointer to VMA or NULL if not available.
* @addr: Virtual Address of the allocation. Must be inside the VMA.
*
@@ -1818,7 +1819,8 @@ static struct page *alloc_page_interleave(gfp_t gfp, unsigned order,
* Should be called with the mm_sem of the vma hold.
*/
struct page *
-alloc_page_vma(gfp_t gfp, struct vm_area_struct *vma, unsigned long addr)
+alloc_pages_vma(gfp_t gfp, int order, struct vm_area_struct *vma,
+ unsigned long addr)
{
struct mempolicy *pol = get_vma_policy(current, vma, addr);
struct zonelist *zl;
@@ -1830,7 +1832,7 @@ alloc_page_vma(gfp_t gfp, struct vm_area_struct *vma, unsigned long addr)
nid = interleave_nid(pol, vma, addr, PAGE_SHIFT);
mpol_cond_put(pol);
- page = alloc_page_interleave(gfp, 0, nid);
+ page = alloc_page_interleave(gfp, order, nid);
put_mems_allowed();
return page;
}
@@ -1839,7 +1841,7 @@ alloc_page_vma(gfp_t gfp, struct vm_area_struct *vma, unsigned long addr)
/*
* slow path: ref counted shared policy
*/
- struct page *page = __alloc_pages_nodemask(gfp, 0,
+ struct page *page = __alloc_pages_nodemask(gfp, order,
zl, policy_nodemask(gfp, pol));
__mpol_put(pol);
put_mems_allowed();
@@ -1848,7 +1850,8 @@ alloc_page_vma(gfp_t gfp, struct vm_area_struct *vma, unsigned long addr)
/*
* fast path: default or task policy
*/
- page = __alloc_pages_nodemask(gfp, 0, zl, policy_nodemask(gfp, pol));
+ page = __alloc_pages_nodemask(gfp, order, zl,
+ policy_nodemask(gfp, pol));
put_mems_allowed();
return page;
}