summaryrefslogtreecommitdiffstats
path: root/kernel/printk
diff options
context:
space:
mode:
authorNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>2016-11-10 10:46:23 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-11-11 08:12:37 -0800
commitc3901e722b2975666f42748340df798114742d6d (patch)
tree9cd4508bd975e35b393982f3c61101c98c90dee6 /kernel/printk
parentdd111be69114cc867f8e826284559bfbc1c40e37 (diff)
downloadlinux-c3901e722b2975666f42748340df798114742d6d.tar.bz2
mm: hwpoison: fix thp split handling in memory_failure()
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>
Diffstat (limited to 'kernel/printk')
0 files changed, 0 insertions, 0 deletions