The patch titled
rmap: remove obsolete check from __page_check_anon_rmap()
has been added to the -mm tree. Its filename is
rmap-remove-obsolete-check-from-__page_check_anon_rmap.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: rmap: remove obsolete check from __page_check_anon_rmap()
From: Rik van Riel <riel@xxxxxxxxxx>
When an anonymous page is inherited from a parent process, the
vma->anon_vma can differ from the page anon_vma. This can trip up
__page_check_anon_rmap, which is indirectly called from do_swap_page().
Remove that obsolete check to prevent an oops.
Signed-off-by: Rik van Riel <riel@xxxxxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Larry Woodman <lwoodman@xxxxxxxxxx>
Cc: Lee Schermerhorn <Lee.Schermerhorn@xxxxxx>
Cc: Minchan Kim <minchan.kim@xxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Hugh Dickins <hugh.dickins@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/rmap.c | 3 ---
1 file changed, 3 deletions(-)
diff -puN mm/rmap.c~rmap-remove-obsolete-check-from-__page_check_anon_rmap mm/rmap.c
--- a/mm/rmap.c~rmap-remove-obsolete-check-from-__page_check_anon_rmap
+++ a/mm/rmap.c
@@ -756,9 +756,6 @@ static void __page_check_anon_rmap(struc
* are initially only visible via the pagetables, and the pte is locked
* over the call to page_add_new_anon_rmap.
*/
- struct anon_vma *anon_vma = vma->anon_vma;
- anon_vma = (void *) anon_vma + PAGE_MAPPING_ANON;
- BUG_ON(page->mapping != (struct address_space *)anon_vma);
BUG_ON(page->index != linear_page_index(vma, address));
#endif
}
_
Patches currently in -mm which might be from riel@xxxxxxxxxx are
mm-introduce-dump_page-and-print-symbolic-flag-names.patch
page-allocator-reduce-fragmentation-in-buddy-allocator-by-adding-buddies-that-are-merging-to-the-tail-of-the-free-lists.patch
mlock_vma_pages_range-never-return-negative-value.patch
mlock_vma_pages_range-only-return-success-or-failure.patch
vmscan-check-high-watermark-after-shrink-zone.patch
vmscan-check-high-watermark-after-shrink-zone-fix.patch
vmscan-get_scan_ratio-cleanup.patch
mm-page_allocc-remove-duplicate-call-to-trace_mm_page_free_direct.patch
mm-page_allocc-adjust-a-call-site-to-trace_mm_page_free_direct.patch
mm-remove-function-free_hot_page.patch
mm-remove-function-free_hot_page-fix.patch
mm-restore-zone-all_unreclaimable-to-independence-word-fix.patch
mm-restore-zone-all_unreclaimable-to-independence-word-fix-2.patch
mm-change-anon_vma-linking-to-fix-multi-process-server-scalability-issue.patch
mm-change-anon_vma-linking-to-fix-multi-process-server-scalability-issue-fix.patch
rmap-remove-obsolete-check-from-__page_check_anon_rmap.patch
rmap-move-exclusively-owned-pages-to-own-anon_vma-in-do_wp_page.patch
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