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| author | Hillf Danton <dhillf@gmail.com> | 2011-10-31 17:09:38 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-10-31 17:30:50 -0700 |
| commit | 0089e4853ae1ac161fae5137170971ccb6f4f152 (patch) | |
| tree | 6e23993f320cd6b0d45a5fb4832188cd2092efe2 /mm | |
| parent | df9d6985be2a7e7683c46e4c6ea608fc69f02b45 (diff) | |
| download | linux-stable-0089e4853ae1ac161fae5137170971ccb6f4f152.tar.gz linux-stable-0089e4853ae1ac161fae5137170971ccb6f4f152.tar.bz2 linux-stable-0089e4853ae1ac161fae5137170971ccb6f4f152.zip | |
mm/huge_memory: fix copying user highpage
The THP copy-on-write handler falls back to regular-sized pages for a huge
page replacement upon allocation failure or if THP has been individually
disabled in the target VMA. The loop responsible for copying page-sized
chunks accidentally uses multiples of PAGE_SHIFT instead of PAGE_SIZE as
the virtual address arg for copy_user_highpage().
Signed-off-by: Hillf Danton <dhillf@gmail.com>
Acked-by: Johannes Weiner <jweiner@redhat.com>
Reviewed-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')
| -rw-r--r-- | mm/huge_memory.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 44f57631cd7c..ef954384f53a 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -830,7 +830,7 @@ static int do_huge_pmd_wp_page_fallback(struct mm_struct *mm, for (i = 0; i < HPAGE_PMD_NR; i++) { copy_user_highpage(pages[i], page + i, - haddr + PAGE_SHIFT*i, vma); + haddr + PAGE_SIZE * i, vma); __SetPageUptodate(pages[i]); cond_resched(); } |