diff options
| author | Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> | 2012-10-08 16:33:47 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-13 05:47:11 +0900 |
| commit | 3c889435b5b1813446f569984b853836a3ffaa45 (patch) | |
| tree | 2c6ad0e5e0fcd016f2a84a73169d84b5132d8b73 /mm | |
| parent | 1fb829ba9ce6654af3fcb431d01f83f64db7f021 (diff) | |
kpageflags: fix wrong KPF_THP on non-huge compound pages
commit 7a71932d5676b7410ab64d149bad8bde6b0d8632 upstream.
KPF_THP can be set on non-huge compound pages (like slab pages or pages
allocated by drivers with __GFP_COMP) because PageTransCompound only
checks PG_head and PG_tail. Obviously this is a bug and breaks user space
applications which look for thp via /proc/kpageflags.
This patch rules out setting KPF_THP wrongly by additionally checking
PageLRU on the head pages.
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: David Rientjes <rientjes@google.com>
Reviewed-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions