Commit 3d92860f authored Jun 04, 2014 by Konstantin Khlebnikov Committed by Linus Torvalds Jun 04, 2014

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



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>

parent 226b4ccd

mm/rmap.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1252,7 +1252,7 @@ static int try_to_unmap_one(struct page page, struct vm_area_struct vma,

		out_unmap:
		pte_unmap_unlock(pte, ptl);
		if (ret != SWAP_FAIL)
		if (ret != SWAP_FAIL && TTU_ACTION(flags) != TTU_MUNLOCK)
		mmu_notifier_invalidate_page(mm, address);
		out:
		return ret;