diff options
| author | Tejun Heo | 2017-02-23 00:41:36 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2017-02-23 01:41:27 +0100 |
| commit | 17cc4dfeda97636d67e83de8cd41940b65a93bc7 (patch) | |
| tree | f260f03ae6ec4feee0bd0e84d39d38f93158eb2b /include/linux | |
| parent | slab: remove slub sysfs interface files early for empty memcg caches (diff) | |
| download | kernel-qcow2-linux-17cc4dfeda97636d67e83de8cd41940b65a93bc7.tar.gz kernel-qcow2-linux-17cc4dfeda97636d67e83de8cd41940b65a93bc7.tar.xz kernel-qcow2-linux-17cc4dfeda97636d67e83de8cd41940b65a93bc7.zip | |
slab: use memcg_kmem_cache_wq for slab destruction operations
If there's contention on slab_mutex, queueing the per-cache destruction
work item on the system_wq can unnecessarily create and tie up a lot of
kworkers.
Rename memcg_kmem_cache_create_wq to memcg_kmem_cache_wq and make it
global and use that workqueue for the destruction work items too. While
at it, convert the workqueue from an unbound workqueue to a per-cpu one
with concurrency limited to 1. It's generally preferable to use per-cpu
workqueues and concurrency limit of 1 is safe enough.
This is suggested by Joonsoo Kim.
Link: http://lkml.kernel.org/r/20170117235411.9408-11-tj@kernel.org
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Jay Vana <jsvana@fb.com>
Acked-by: Vladimir Davydov <vdavydov@tarantool.org>
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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/memcontrol.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 9fcece9be85d..5af377303880 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -830,6 +830,7 @@ void memcg_kmem_uncharge(struct page *page, int order); #if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB) extern struct static_key_false memcg_kmem_enabled_key; +extern struct workqueue_struct *memcg_kmem_cache_wq; extern int memcg_nr_cache_ids; void memcg_get_cache_ids(void); |