The patch titled
rmap: always add new vmas at the end
has been added to the -mm tree. Its filename is
rmap-always-add-new-vmas-at-the-end.patch
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------------------------------------------------------
Subject: rmap: always add new vmas at the end
From: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Make sure to always add new VMAs at the end of the list. This is
important so rmap_walk does not miss a VMA that was created during the
rmap_walk.
The old code got this right most of the time due to luck, but was buggy
when anon_vma_prepare reused a mergeable anon_vma.
Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Signed-off-by: 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~rmap-always-add-new-vmas-at-the-end mm/rmap.c
--- a/mm/rmap.c~rmap-always-add-new-vmas-at-the-end
+++ a/mm/rmap.c
@@ -148,7 +148,7 @@ int anon_vma_prepare(struct vm_area_stru
avc->anon_vma = anon_vma;
avc->vma = vma;
list_add(&avc->same_vma, &vma->anon_vma_chain);
- list_add(&avc->same_anon_vma, &anon_vma->head);
+ list_add_tail(&avc->same_anon_vma, &anon_vma->head);
allocated = NULL;
avc = NULL;
}
_
Patches currently in -mm which might be from aarcange@xxxxxxxxxx are
linux-next.patch
hugetlb-call-mmu-notifiers-on-hugepage-cow.patch
define-madv_hugepage.patch
mmap-remove-unnecessary-lock-from-__vma_link.patch
rmap-always-add-new-vmas-at-the-end.patch
ksm-fix-ksm-swapin-time-optimization.patch
rmap-always-use-anon_vma-root-pointer.patch
rmap-resurrect-page_address_in_vma-anon_vma-check.patch
add-anon_vma-bug-checks.patch
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