Revision c3901e722b2975666f42748340df798114742d6d authored by Naoya Horiguchi on 10 November 2016, 18:46:23 UTC, committed by Linus Torvalds on 11 November 2016, 16:12:37 UTC
When memory_failure() runs on a thp tail page after pmd is split, we trigger the following VM_BUG_ON_PAGE(): page:ffffd7cd819b0040 count:0 mapcount:0 mapping: (null) index:0x1 flags: 0x1fffc000400000(hwpoison) page dumped because: VM_BUG_ON_PAGE(!page_count(p)) ------------[ cut here ]------------ kernel BUG at /src/linux-dev/mm/memory-failure.c:1132! memory_failure() passed refcount and page lock from tail page to head page, which is not needed because we can pass any subpage to split_huge_page(). Fixes: 61f5d698cc97 ("mm: re-enable THP") Link: http://lkml.kernel.org/r/1477961577-7183-1-git-send-email-n-horiguchi@ah.jp.nec.com Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: <stable@vger.kernel.org> [4.5+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent dd111be
File | Mode | Size |
---|---|---|
Documentation | ||
arch | ||
block | ||
certs | ||
crypto | ||
drivers | ||
firmware | ||
fs | ||
include | ||
init | ||
ipc | ||
kernel | ||
lib | ||
mm | ||
net | ||
samples | ||
scripts | ||
security | ||
sound | ||
tools | ||
usr | ||
virt | ||
.cocciconfig | -rw-r--r-- | 59 bytes |
.get_maintainer.ignore | -rw-r--r-- | 31 bytes |
.gitattributes | -rw-r--r-- | 30 bytes |
.gitignore | -rw-r--r-- | 1.3 KB |
.mailmap | -rw-r--r-- | 7.5 KB |
COPYING | -rw-r--r-- | 18.3 KB |
CREDITS | -rw-r--r-- | 96.0 KB |
Kbuild | -rw-r--r-- | 2.8 KB |
Kconfig | -rw-r--r-- | 252 bytes |
MAINTAINERS | -rw-r--r-- | 373.4 KB |
Makefile | -rw-r--r-- | 57.3 KB |
README | -rw-r--r-- | 17.9 KB |
REPORTING-BUGS | -rw-r--r-- | 7.3 KB |
Computing file changes ...