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vmscan: per memory cgroup slab shrinkers

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This patch adds SHRINKER_MEMCG_AWARE flag.  If a shrinker has this flag
set, it will be called per memory cgroup.  The memory cgroup to scan
objects from is passed in shrink_control->memcg.  If the memory cgroup
is NULL, a memcg aware shrinker is supposed to scan objects from the
global list.  Unaware shrinkers are only called on global pressure with
memcg=NULL.

Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Greg Thelen <gthelen@google.com>
Cc: Glauber Costa <glommer@gmail.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Vladimir Davydov
2015-02-12 14:58:54 -08:00
committed by Linus Torvalds
parent 4101b62435
commit cb731d6c62
7 changed files with 79 additions and 49 deletions
Download Patch File Download Diff File Expand all files Collapse all files
mm/memory-failure.c
+2 -9
View File
@@ -242,15 +242,8 @@ void shake_page(struct page *p, int access)
* Only call shrink_node_slabs here (which would also shrink
* other caches) if access is not potentially fatal.
*/
if (access) {
int nr;
int nid = page_to_nid(p);
do {
nr = shrink_node_slabs(GFP_KERNEL, nid, 1000, 1000);
if (page_count(p) == 1)
break;
} while (nr > 10);
}
if (access)
drop_slab_node(page_to_nid(p));
}
EXPORT_SYMBOL_GPL(shake_page);