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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-22 09:44:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-22 09:44:36 -0700 |
| commit | f3ca10dde49043fbbb055854278b26954b549b36 (patch) | |
| tree | 1358fc0cb8167b6294ec8d3a37d3e349d512c843 | |
| parent | 5e6c94a999f67f120c6bbba71bbee840dfee6338 (diff) | |
| download | op-kernel-dev-f3ca10dde49043fbbb055854278b26954b549b36.zip op-kernel-dev-f3ca10dde49043fbbb055854278b26954b549b36.tar.gz | |
Revert "mm: avoid tail page refcounting on non-THP compound pages"
This reverts commit 8d63d99a5dfbdb997d12dd3c07b2070ca723db3b.
It causes in VM mapping refcount errors:
page:ffffea0010a15040 count:0 mapcount:1 mapping: (null) index:0x0
flags: 0x8000000000008014(referenced|dirty|tail)
page dumped because: VM_BUG_ON_PAGE(page_mapcount(page) != 0)
------------[ cut here ]------------
kernel BUG at mm/swap.c:134!
as reported by Borislav Petkov
Reported-and-tested-by: Borislav Petkov <bp@alien8.de>
Cc: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Hugh Dickins <hughd@google.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/linux/mm.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 8b08607..0755b9f 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -499,7 +499,7 @@ static inline int page_count(struct page *page) static inline bool __compound_tail_refcounted(struct page *page) { - return PageAnon(page) && !PageSlab(page) && !PageHeadHuge(page); + return !PageSlab(page) && !PageHeadHuge(page); } /* |
