diff options
| author | Johannes Weiner <hannes@cmpxchg.org> | 2016-03-16 00:57:25 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-03-16 02:55:16 +0300 |
| commit | fdf1cdb91b6ab7a8a91df68c384f36b8a0909cab (patch) | |
| tree | 828ad38946acad9990dcc733a10ebdeed0c1fbd5 /block/blk.h | |
| parent | 62cccb8c8e7a3ca233f49d5e7dcb1557d25465cd (diff) | |
| download | linux-fdf1cdb91b6ab7a8a91df68c384f36b8a0909cab.tar.xz | |
mm: remove unnecessary uses of lock_page_memcg()
There are several users that nest lock_page_memcg() inside lock_page()
to prevent page->mem_cgroup from changing. But the page lock prevents
pages from moving between cgroups, so that is unnecessary overhead.
Remove lock_page_memcg() in contexts with locked contexts and fix the
debug code in the page stat functions to be okay with the page lock.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Cc: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'block/blk.h')
0 files changed, 0 insertions, 0 deletions