From: Christoph Lameter <cl@linux.com>
To: Glauber Costa <glommer@parallels.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Andrew Morton <akpm@linux-foundation.org>,
David Rientjes <rientjes@google.com>,
Pekka Enberg <penberg@kernel.org>,
Greg Thelen <gthelen@google.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Michal Hocko <mhocko@suse.cz>,
Frederic Weisbecker <fweisbec@gmail.com>,
devel@openvz.org, cgroups@vger.kernel.org,
Pekka Enberg <penberg@cs.helsinki.fi>,
Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Suleiman Souhlal <suleiman@google.com>
Subject: Re: [PATCH 10/10] memcg/sl[au]b: shrink dead caches
Date: Wed, 25 Jul 2012 12:13:23 -0500 (CDT) [thread overview]
Message-ID: <alpine.DEB.2.00.1207251207180.3543@router.home> (raw)
In-Reply-To: <1343227101-14217-11-git-send-email-glommer@parallels.com>
On Wed, 25 Jul 2012, Glauber Costa wrote:
> In the slub allocator, when the last object of a page goes away, we
> don't necessarily free it - there is not necessarily a test for empty
> page in any slab_free path.
That is true for the slab allocator as well. In either case calling
kmem_cache_shrink() will make the objects go away by draining the cached
objects and freeing the pages used for the objects back to the page
allocator. You do not need this patch. Just call the proper functions to
drop the objecgts in the caches in either allocator.
> 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.
So this is already for both allocators?
--
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next prev parent reply other threads:[~2012-07-25 17:13 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-25 14:38 [PATCH 00/10] memcg kmem limitation - slab Glauber Costa
2012-07-25 14:38 ` [PATCH 01/10] slab/slub: struct memcg_params Glauber Costa
2012-07-25 19:26 ` Kirill A. Shutemov
2012-07-25 19:25 ` Glauber Costa
2012-07-25 14:38 ` [PATCH 02/10] consider a memcg parameter in kmem_create_cache Glauber Costa
2012-07-25 18:10 ` Kirill A. Shutemov
2012-07-26 9:42 ` Glauber Costa
2012-07-26 10:01 ` Kirill A. Shutemov
2012-07-26 10:27 ` Glauber Costa
2012-07-25 14:38 ` [PATCH 03/10] memcg: infrastructure to match an allocation to the right cache Glauber Costa
2012-07-25 21:53 ` Kirill A. Shutemov
2012-07-25 14:38 ` [PATCH 04/10] memcg: skip memcg kmem allocations in specified code regions Glauber Costa
2012-07-30 12:50 ` Kirill A. Shutemov
2012-07-30 14:09 ` Glauber Costa
2012-07-25 14:38 ` [PATCH 05/10] slab: allow enable_cpu_cache to use preset values for its tunables Glauber Costa
2012-07-25 17:05 ` Christoph Lameter
2012-07-25 18:24 ` Glauber Costa
2012-07-25 18:33 ` Christoph Lameter
2012-07-26 14:02 ` Glauber Costa
2012-07-25 14:38 ` [PATCH 06/10] sl[au]b: Allocate objects from memcg cache Glauber Costa
2012-07-30 12:58 ` Kirill A. Shutemov
2012-07-30 13:11 ` Glauber Costa
2012-07-25 14:38 ` [PATCH 07/10] memcg: destroy memcg caches Glauber Costa
2012-07-25 14:38 ` [PATCH 08/10] memcg/sl[au]b Track all the memcg children of a kmem_cache Glauber Costa
2012-07-25 14:38 ` [PATCH 09/10] slab: slab-specific propagation changes Glauber Costa
2012-07-25 17:07 ` Christoph Lameter
2012-07-25 14:38 ` [PATCH 10/10] memcg/sl[au]b: shrink dead caches Glauber Costa
2012-07-25 17:13 ` Christoph Lameter [this message]
2012-07-25 18:16 ` Glauber Costa
2012-07-31 16:30 ` [PATCH 00/10] memcg kmem limitation - slab Frederic Weisbecker
2012-07-31 16:39 ` Glauber Costa
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