diff options
| author | Punit Agrawal <punit.agrawal@arm.com> | 2017-07-06 15:39:53 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-06 16:24:34 -0700 |
| commit | 5fd27b8e7dbcab0dc5a1346305679ba4bcc20977 (patch) | |
| tree | 08bddd63da8eee5cc5d021c12b6a78401a17c4e8 /mm | |
| parent | e5251fd43007f9e1155331f0fa30685604a8e3a1 (diff) | |
mm: rmap: use correct helper when poisoning hugepages
Using set_pte_at() does not do the right thing when putting down
HWPOISON swap entries for hugepages on architectures that support
contiguous ptes.
Fix this problem by using set_huge_swap_pte_at() which was introduced to
fix exactly this problem.
Link: http://lkml.kernel.org/r/20170522133604.11392-7-punit.agrawal@arm.com
Signed-off-by: Punit Agrawal <punit.agrawal@arm.com>
Acked-by: Steve Capper <steve.capper@arm.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/rmap.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/mm/rmap.c b/mm/rmap.c index 130c238fe384..b255743351e5 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -1367,15 +1367,18 @@ static bool try_to_unmap_one(struct page *page, struct vm_area_struct *vma, update_hiwater_rss(mm); if (PageHWPoison(page) && !(flags & TTU_IGNORE_HWPOISON)) { + pteval = swp_entry_to_pte(make_hwpoison_entry(subpage)); if (PageHuge(page)) { int nr = 1 << compound_order(page); hugetlb_count_sub(nr, mm); + set_huge_swap_pte_at(mm, address, + pvmw.pte, pteval, + vma_mmu_pagesize(vma)); } else { dec_mm_counter(mm, mm_counter(page)); + set_pte_at(mm, address, pvmw.pte, pteval); } - pteval = swp_entry_to_pte(make_hwpoison_entry(subpage)); - set_pte_at(mm, address, pvmw.pte, pteval); } else if (pte_unused(pteval)) { /* * The guest indicated that the page content is of no |