From: Glauber Costa <glommer@parallels.com>
To: Christoph Lameter <cl@linux.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 22:16:34 +0400 [thread overview]
Message-ID: <50103802.1070700@parallels.com> (raw)
In-Reply-To: <alpine.DEB.2.00.1207251207180.3543@router.home>
On 07/25/2012 09:13 PM, Christoph Lameter wrote:
> 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?
>
Yes, I just didn't updated the whole changelog. my bad.
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2012-07-25 18:19 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
2012-07-25 18:16 ` Glauber Costa [this message]
2012-07-31 16:30 ` [PATCH 00/10] memcg kmem limitation - slab Frederic Weisbecker
2012-07-31 16:39 ` Glauber Costa
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=50103802.1070700@parallels.com \
--to=glommer@parallels.com \
--cc=akpm@linux-foundation.org \
--cc=cgroups@vger.kernel.org \
--cc=cl@linux.com \
--cc=devel@openvz.org \
--cc=fweisbec@gmail.com \
--cc=gthelen@google.com \
--cc=hannes@cmpxchg.org \
--cc=kamezawa.hiroyu@jp.fujitsu.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mhocko@suse.cz \
--cc=penberg@cs.helsinki.fi \
--cc=penberg@kernel.org \
--cc=rientjes@google.com \
--cc=suleiman@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox