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author | Vladimir Davydov <vdavydov.dev@gmail.com> | 2016-12-12 16:41:32 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-12 18:55:06 -0800 |
commit | 89e364db71fb5e7fc8d93228152abfa67daf35fa (patch) | |
tree | 7e70cba61d27fc6e7c7ebd21ec498b808ba2e132 /kernel/debug | |
parent | 13583c3d3224508582ec03d881d0b68dd3ee8e10 (diff) | |
download | linux-89e364db71fb5e7fc8d93228152abfa67daf35fa.tar.bz2 |
slub: move synchronize_sched out of slab_mutex on shrink
synchronize_sched() is a heavy operation and calling it per each cache
owned by a memory cgroup being destroyed may take quite some time. What
is worse, it's currently called under the slab_mutex, stalling all works
doing cache creation/destruction.
Actually, there isn't much point in calling synchronize_sched() for each
cache - it's enough to call it just once - after setting cpu_partial for
all caches and before shrinking them. This way, we can also move it out
of the slab_mutex, which we have to hold for iterating over the slab
cache list.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=172991
Link: http://lkml.kernel.org/r/0a10d71ecae3db00fb4421bcd3f82bcc911f4be4.1475329751.git.vdavydov.dev@gmail.com
Signed-off-by: Vladimir Davydov <vdavydov.dev@gmail.com>
Reported-by: Doug Smythies <dsmythies@telus.net>
Acked-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/debug')
0 files changed, 0 insertions, 0 deletions