Subject: + mm-dont-call-mmu_notifier_invalidate_page-during-munlock.patch added to -mm tree
To: koct9i@xxxxxxxxx,riel@xxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Wed, 28 May 2014 16:10:03 -0700
The patch titled
Subject: mm/rmap.c: don't call mmu_notifier_invalidate_page() during munlock
has been added to the -mm tree. Its filename is
mm-dont-call-mmu_notifier_invalidate_page-during-munlock.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-dont-call-mmu_notifier_invalidate_page-during-munlock.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-dont-call-mmu_notifier_invalidate_page-during-munlock.patch
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------------------------------------------------------
From: Konstantin Khlebnikov <koct9i@xxxxxxxxx>
Subject: 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@xxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/rmap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/rmap.c~mm-dont-call-mmu_notifier_invalidate_page-during-munlock mm/rmap.c
--- a/mm/rmap.c~mm-dont-call-mmu_notifier_invalidate_page-during-munlock
+++ a/mm/rmap.c
@@ -1246,7 +1246,7 @@ static int try_to_unmap_one(struct page
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;
_
Patches currently in -mm which might be from koct9i@xxxxxxxxx are
tools-vm-page-typesc-catch-sigbus-if-raced-with-truncate.patch
mm-process_vm_access-move-config-option-into-init-kconfig.patch
mm-dont-call-mmu_notifier_invalidate_page-during-munlock.patch
linux-next.patch
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