From: Christoph Lameter <cl@linux.com>
To: Glauber Costa <glommer@parallels.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
cgroups@vger.kernel.org, Mel Gorman <mgorman@suse.de>,
Tejun Heo <tj@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Michal Hocko <mhocko@suse.cz>,
Johannes Weiner <hannes@cmpxchg.org>,
kamezawa.hiroyu@jp.fujitsu.com,
David Rientjes <rientjes@google.com>,
Pekka Enberg <penberg@kernel.org>,
devel@openvz.org, Pekka Enberg <penberg@cs.helsinki.fi>,
Suleiman Souhlal <suleiman@google.com>
Subject: Re: [PATCH v5 14/18] memcg/sl[au]b: shrink dead caches
Date: Fri, 19 Oct 2012 19:47:51 +0000 [thread overview]
Message-ID: <0000013a7a9144d1-de184c46-2a7d-4e6c-8606-927cc1f48969-000000@email.amazonses.com> (raw)
In-Reply-To: <1350656442-1523-15-git-send-email-glommer@parallels.com>
On Fri, 19 Oct 2012, Glauber Costa wrote:
> An unlikely branch is used to make sure this case does not affect
> performance in the usual slab_free path.
>
> The slab allocator has a time based reaper that would eventually get rid
> of the objects, but we can also call it explicitly, since dead caches
> are not a likely event.
This is also something that could be done from slab_common since all
allocators have kmem_cache_shrink and kmem_cache_shrink can be used to
drain the caches and free up empty slab pages.
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Lameter <cl@linux.com>
To: Glauber Costa <glommer@parallels.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
cgroups@vger.kernel.org, Mel Gorman <mgorman@suse.de>,
Tejun Heo <tj@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Michal Hocko <mhocko@suse.cz>,
Johannes Weiner <hannes@cmpxchg.org>,
kamezawa.hiroyu@jp.fujitsu.com,
David Rientjes <rientjes@google.com>,
Pekka Enberg <penberg@kernel.org>,
devel@openvz.org, Pekka Enberg <penberg@cs.helsinki.fi>,
Suleiman Souhlal <suleiman@google.com>
Subject: Re: [PATCH v5 14/18] memcg/sl[au]b: shrink dead caches
Date: Fri, 19 Oct 2012 19:47:51 +0000 [thread overview]
Message-ID: <0000013a7a9144d1-de184c46-2a7d-4e6c-8606-927cc1f48969-000000@email.amazonses.com> (raw)
In-Reply-To: <1350656442-1523-15-git-send-email-glommer@parallels.com>
On Fri, 19 Oct 2012, Glauber Costa wrote:
> An unlikely branch is used to make sure this case does not affect
> performance in the usual slab_free path.
>
> The slab allocator has a time based reaper that would eventually get rid
> of the objects, but we can also call it explicitly, since dead caches
> are not a likely event.
This is also something that could be done from slab_common since all
allocators have kmem_cache_shrink and kmem_cache_shrink can be used to
drain the caches and free up empty slab pages.
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WARNING: multiple messages have this Message-ID (diff)
From: Christoph Lameter <cl-vYTEC60ixJUAvxtiuMwx3w@public.gmane.org>
To: Glauber Costa <glommer-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>
Cc: linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Mel Gorman <mgorman-l3A5Bk7waGM@public.gmane.org>,
Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Michal Hocko <mhocko-AlSwsSmVLrQ@public.gmane.org>,
Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>,
kamezawa.hiroyu-+CUm20s59erQFUHtdCDX3A@public.gmane.org,
David Rientjes <rientjes-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Pekka Enberg <penberg-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
devel-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org,
Pekka Enberg <penberg-bbCR+/B0CizivPeTLB3BmA@public.gmane.org>,
Suleiman Souhlal
<suleiman-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
Subject: Re: [PATCH v5 14/18] memcg/sl[au]b: shrink dead caches
Date: Fri, 19 Oct 2012 19:47:51 +0000 [thread overview]
Message-ID: <0000013a7a9144d1-de184c46-2a7d-4e6c-8606-927cc1f48969-000000@email.amazonses.com> (raw)
In-Reply-To: <1350656442-1523-15-git-send-email-glommer-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>
On Fri, 19 Oct 2012, Glauber Costa wrote:
> An unlikely branch is used to make sure this case does not affect
> performance in the usual slab_free path.
>
> The slab allocator has a time based reaper that would eventually get rid
> of the objects, but we can also call it explicitly, since dead caches
> are not a likely event.
This is also something that could be done from slab_common since all
allocators have kmem_cache_shrink and kmem_cache_shrink can be used to
drain the caches and free up empty slab pages.
next prev parent reply other threads:[~2012-10-19 19:47 UTC|newest]
Thread overview: 132+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-19 14:20 [PATCH v5 00/18] slab accounting for memcg Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` [PATCH v5 01/18] move slabinfo processing to slab_common.c Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-24 6:43 ` Pekka Enberg
2012-10-24 6:43 ` Pekka Enberg
2012-10-24 6:43 ` Pekka Enberg
2012-10-19 14:20 ` [PATCH v5 02/18] move print_slabinfo_header " Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` [PATCH v5 03/18] sl[au]b: process slabinfo_show in common code Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` [PATCH v5 04/18] slab: don't preemptively remove element from list in cache destroy Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 19:34 ` Christoph Lameter
2012-10-19 19:34 ` Christoph Lameter
2012-10-19 19:34 ` Christoph Lameter
2012-10-22 8:40 ` Glauber Costa
2012-10-22 8:40 ` Glauber Costa
2012-10-22 8:40 ` Glauber Costa
2012-10-24 6:54 ` Pekka Enberg
2012-10-24 6:54 ` Pekka Enberg
2012-10-24 6:54 ` Pekka Enberg
2012-10-24 16:19 ` Glauber Costa
2012-10-24 16:19 ` Glauber Costa
2012-10-19 14:20 ` [PATCH v5 05/18] slab/slub: struct memcg_params Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-23 17:25 ` JoonSoo Kim
2012-10-23 17:25 ` JoonSoo Kim
2012-10-23 17:25 ` JoonSoo Kim
2012-10-24 8:42 ` Glauber Costa
2012-10-24 8:42 ` Glauber Costa
2012-10-19 14:20 ` [PATCH v5 06/18] consider a memcg parameter in kmem_create_cache Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-23 17:50 ` JoonSoo Kim
2012-10-23 17:50 ` JoonSoo Kim
2012-10-23 17:50 ` JoonSoo Kim
2012-10-24 8:42 ` Glauber Costa
2012-10-24 8:42 ` Glauber Costa
2012-10-24 8:42 ` Glauber Costa
2012-10-25 13:42 ` Glauber Costa
2012-10-25 13:42 ` Glauber Costa
2012-10-25 13:42 ` Glauber Costa
2012-10-19 14:20 ` [PATCH v5 07/18] Allocate memory for memcg caches whenever a new memcg appears Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` [PATCH v5 08/18] memcg: infrastructure to match an allocation to the right cache Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-24 18:10 ` JoonSoo Kim
2012-10-24 18:10 ` JoonSoo Kim
2012-10-25 11:05 ` Glauber Costa
2012-10-25 11:05 ` Glauber Costa
2012-10-25 11:05 ` Glauber Costa
2012-10-25 18:06 ` Tejun Heo
2012-10-25 18:06 ` Tejun Heo
2012-10-25 18:06 ` Tejun Heo
2012-10-25 18:08 ` Tejun Heo
2012-10-25 18:08 ` Tejun Heo
2012-10-19 14:20 ` [PATCH v5 09/18] memcg: skip memcg kmem allocations in specified code regions Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` [PATCH v5 10/18] sl[au]b: always get the cache from its page in kfree Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 19:44 ` Christoph Lameter
2012-10-19 19:44 ` Christoph Lameter
2012-10-19 19:44 ` Christoph Lameter
2012-10-22 10:13 ` Glauber Costa
2012-10-22 10:13 ` Glauber Costa
2012-10-22 10:13 ` Glauber Costa
2012-10-19 14:20 ` [PATCH v5 11/18] sl[au]b: Allocate objects from memcg cache Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 19:46 ` Christoph Lameter
2012-10-19 19:46 ` Christoph Lameter
2012-10-19 19:46 ` Christoph Lameter
2012-10-29 15:14 ` JoonSoo Kim
2012-10-29 15:14 ` JoonSoo Kim
2012-10-29 15:14 ` JoonSoo Kim
2012-10-29 15:19 ` Glauber Costa
2012-10-29 15:19 ` Glauber Costa
2012-10-29 15:19 ` Glauber Costa
2012-10-19 14:20 ` [PATCH v5 12/18] memcg: destroy memcg caches Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` [PATCH v5 13/18] memcg/sl[au]b Track all the memcg children of a kmem_cache Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-29 15:26 ` JoonSoo Kim
2012-10-29 15:26 ` JoonSoo Kim
2012-10-29 15:26 ` JoonSoo Kim
2012-10-30 11:31 ` Glauber Costa
2012-10-30 11:31 ` Glauber Costa
2012-10-30 11:31 ` Glauber Costa
2012-10-19 14:20 ` [PATCH v5 14/18] memcg/sl[au]b: shrink dead caches Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 19:47 ` Christoph Lameter [this message]
2012-10-19 19:47 ` Christoph Lameter
2012-10-19 19:47 ` Christoph Lameter
2012-10-22 7:37 ` Glauber Costa
2012-10-22 7:37 ` Glauber Costa
2012-10-22 7:37 ` Glauber Costa
2012-10-19 14:20 ` [PATCH v5 15/18] Aggregate memcg cache values in slabinfo Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 19:50 ` Christoph Lameter
2012-10-19 19:50 ` Christoph Lameter
2012-10-22 15:11 ` Glauber Costa
2012-10-22 15:11 ` Glauber Costa
2012-10-19 14:20 ` [PATCH v5 16/18] slab: propagate tunables values Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 19:51 ` Christoph Lameter
2012-10-19 19:51 ` Christoph Lameter
2012-10-22 7:48 ` Glauber Costa
2012-10-22 7:48 ` Glauber Costa
2012-10-23 20:44 ` Christoph Lameter
2012-10-23 20:44 ` Christoph Lameter
2012-10-19 14:20 ` [PATCH v5 17/18] slub: slub-specific propagation changes Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` [PATCH v5 18/18] Add slab-specific documentation about the kmem controller Glauber Costa
2012-10-19 14:20 ` Glauber Costa
2012-10-19 14:20 ` Glauber Costa
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