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mm/rmap.c: don't call mmu_notifier_invalidate_page() during munlock

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In its munmap mode, try_to_unmap_one() searches other mlocked vmas, it
never unmaps pages.  There is no reason for invalidation because ptes are
left unchanged.

Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Konstantin Khlebnikov 2014-06-04 16:10:51 -07:00 committed by Linus Torvalds
parent 226b4ccdcb
commit 3d92860f97
1 changed files with 1 additions and 1 deletions
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2
mm/rmap.c
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@ -1252,7 +1252,7 @@ static int try_to_unmap_one(struct page *page, struct vm_area_struct *vma,
out_unmap: out_unmap:
pte_unmap_unlock(pte, ptl); pte_unmap_unlock(pte, ptl);
if (ret != SWAP_FAIL) if (ret != SWAP_FAIL && TTU_ACTION(flags) != TTU_MUNLOCK)
mmu_notifier_invalidate_page(mm, address); mmu_notifier_invalidate_page(mm, address);
out: out:
return ret; return ret;