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| author | Tejun Heo <tj@kernel.org> | 2017-02-23 00:41:36 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-23 01:41:27 +0100 |
| commit | 17cc4dfeda97636d67e83de8cd41940b65a93bc7 (patch) | |
| tree | f260f03ae6ec4feee0bd0e84d39d38f93158eb2b /Documentation/admin-guide | |
| parent | slab: remove slub sysfs interface files early for empty memcg caches (diff) | |
| download | linux-17cc4dfeda97636d67e83de8cd41940b65a93bc7.tar.xz 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 'Documentation/admin-guide')
0 files changed, 0 insertions, 0 deletions