diff options
| author | Vandana Salve <vsalve@nvidia.com> | 2014-06-10 15:06:34 +0530 |
|---|---|---|
| committer | Riham Haidar <rhaidar@nvidia.com> | 2014-06-11 17:09:54 -0700 |
| commit | 0e7370ef6597150986099c837b26ccb526f1ac4a (patch) | |
| tree | 606e79ccf2b8972793a9d895d36e3cb0bdb70e3e /mm | |
| parent | de6afd3c6591b73bc81d8ebd77edc74e884c22d0 (diff) | |
mm: get_user_pages: use NON-MOVABLE pages when FOLL_DURABLE flag is set
Ensure that newly allocated pages, which are faulted in
in FOLL_DURABLE mode comes from non-movalbe pageblocks,
to workaround migration failures with CMA
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
bug 1517584
Change-Id: I76d2185cc7e77992db585a71efaa06a5c0105a76
Signed-off-by: Vandana Salve <vsalve@nvidia.com>
Reviewed-on: http://git-master/r/421677
Reviewed-by: Riham Haidar <rhaidar@nvidia.com>
Tested-by: Riham Haidar <rhaidar@nvidia.com>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memory.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/mm/memory.c b/mm/memory.c index 3a94fbb3fe79..4d1e120536eb 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -1817,6 +1817,9 @@ long __get_user_pages(struct task_struct *tsk, struct mm_struct *mm, int ret; unsigned int fault_flags = 0; + if (gup_flags & FOLL_DURABLE) + fault_flags = FAULT_FLAG_NO_CMA; + /* For mlock, just skip the stack guard page. */ if (foll_flags & FOLL_MLOCK) { if (stack_guard_page(vma, start)) @@ -2543,7 +2546,7 @@ static inline void cow_user_page(struct page *dst, struct page *src, unsigned lo */ static int do_wp_page(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long address, pte_t *page_table, pmd_t *pmd, - spinlock_t *ptl, pte_t orig_pte) + spinlock_t *ptl, pte_t orig_pte, unsigned int flags) __releases(ptl) { struct page *old_page, *new_page = NULL; @@ -2553,6 +2556,10 @@ static int do_wp_page(struct mm_struct *mm, struct vm_area_struct *vma, struct page *dirty_page = NULL; unsigned long mmun_start = 0; /* For mmu_notifiers */ unsigned long mmun_end = 0; /* For mmu_notifiers */ + gfp_t gfp = GFP_HIGHUSER_MOVABLE; + + if (IS_ENABLED(CONFIG_CMA) && (flags & FAULT_FLAG_NO_CMA)) + gfp &= ~__GFP_MOVABLE; old_page = vm_normal_page(vma, address, orig_pte); if (!old_page) { @@ -2716,11 +2723,11 @@ gotten: goto oom; if (is_zero_pfn(pte_pfn(orig_pte))) { - new_page = alloc_zeroed_user_highpage_movable(vma, address); + new_page = alloc_zeroed_user_highpage(gfp, vma, address); if (!new_page) goto oom; } else { - new_page = alloc_page_vma(GFP_HIGHUSER_MOVABLE, vma, address); + new_page = alloc_page_vma(gfp, vma, address); if (!new_page) goto oom; cow_user_page(new_page, old_page, address, vma); @@ -3080,7 +3087,7 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma, } if (flags & FAULT_FLAG_WRITE) { - ret |= do_wp_page(mm, vma, address, page_table, pmd, ptl, pte); + ret |= do_wp_page(mm, vma, address, page_table, pmd, ptl, pte, flags); if (ret & VM_FAULT_ERROR) ret &= VM_FAULT_ERROR; goto out; @@ -3240,6 +3247,11 @@ static int __do_fault(struct mm_struct *mm, struct vm_area_struct *vma, struct vm_fault vmf; int ret; int page_mkwrite = 0; + gfp_t gfp = GFP_HIGHUSER_MOVABLE; + + if (IS_ENABLED(CONFIG_CMA) && (flags & FAULT_FLAG_NO_CMA)) + gfp &= ~__GFP_MOVABLE; + /* * If we do COW later, allocate page befor taking lock_page() @@ -3250,7 +3262,7 @@ static int __do_fault(struct mm_struct *mm, struct vm_area_struct *vma, if (unlikely(anon_vma_prepare(vma))) return VM_FAULT_OOM; - cow_page = alloc_page_vma(GFP_HIGHUSER_MOVABLE, vma, address); + cow_page = alloc_page_vma(gfp, vma, address); if (!cow_page) return VM_FAULT_OOM; @@ -3656,7 +3668,7 @@ int handle_pte_fault(struct mm_struct *mm, if (flags & FAULT_FLAG_WRITE) { if (!pte_write(entry)) return do_wp_page(mm, vma, address, - pte, pmd, ptl, entry); + pte, pmd, ptl, entry, flags); entry = pte_mkdirty(entry); } entry = pte_mkyoung(entry); |