From: Christoph Lameter <cl@linux.com>
To: Glauber Costa <glommer@parallels.com>
Cc: linux-mm@kvack.org, Pekka Enberg <penberg@kernel.org>,
David Rientjes <rientjes@google.com>,
cgroups@vger.kernel.org, devel@openvz.org,
kamezawa.hiroyu@jp.fujitsu.com, linux-kernel@vger.kernel.org,
Frederic Weisbecker <fweisbec@gmail.com>,
Suleiman Souhlal <suleiman@google.com>,
Pekka Enberg <penberg@cs.helsinki.fi>,
Michal Hocko <mhocko@suse.cz>,
Johannes Weiner <hannes@cmpxchg.org>
Subject: Re: [PATCH v4 24/25] memcg/slub: shrink dead caches
Date: Fri, 6 Jul 2012 10:16:36 -0500 (CDT) [thread overview]
Message-ID: <alpine.DEB.2.00.1207061015030.28648@router.home> (raw)
In-Reply-To: <1340015298-14133-25-git-send-email-glommer@parallels.com>
On Mon, 18 Jun 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.
This is the same btw in SLAB which keeps objects in per cpu caches and
keeps empty slab pages on special queues.
> This patch marks all memcg caches as dead. kmem_cache_shrink is called
> for the ones who are not yet dead - this will force internal cache
> reorganization, and then all references to empty pages will be removed.
You need to call this also for slab to drain the caches and free the pages
on the empty list.
next prev parent reply other threads:[~2012-07-06 15:16 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-18 10:27 [PATCH v4 00/25] kmem limitation for memcg Glauber Costa
2012-06-18 10:27 ` [PATCH v4 01/25] slab: rename gfpflags to allocflags Glauber Costa
2012-06-18 10:27 ` [PATCH v4 02/25] provide a common place for initcall processing in kmem_cache Glauber Costa
2012-06-18 10:27 ` [PATCH v4 03/25] slab: move FULL state transition to an initcall Glauber Costa
2012-06-18 10:27 ` [PATCH v4 04/25] Wipe out CFLGS_OFF_SLAB from flags during initial slab creation Glauber Costa
2012-06-18 10:27 ` [PATCH v4 05/25] memcg: Always free struct memcg through schedule_work() Glauber Costa
2012-06-18 12:07 ` Kamezawa Hiroyuki
2012-06-18 12:10 ` Glauber Costa
2012-06-19 0:11 ` Kamezawa Hiroyuki
2012-06-20 7:32 ` Pekka Enberg
2012-06-20 8:40 ` Glauber Costa
2012-06-21 11:39 ` Kamezawa Hiroyuki
2012-06-20 13:20 ` Michal Hocko
2012-06-18 10:27 ` [PATCH v4 06/25] memcg: Make it possible to use the stock for more than one page Glauber Costa
2012-06-20 13:28 ` Michal Hocko
2012-06-20 19:36 ` Glauber Costa
2012-06-21 21:14 ` Michal Hocko
2012-06-25 13:03 ` Glauber Costa
2012-06-18 10:28 ` [PATCH v4 07/25] memcg: Reclaim when more than one page needed Glauber Costa
2012-06-20 13:47 ` Michal Hocko
2012-06-20 19:43 ` Glauber Costa
2012-06-21 21:19 ` Michal Hocko
2012-06-25 13:13 ` Glauber Costa
2012-06-25 14:04 ` Glauber Costa
2012-06-18 10:28 ` [PATCH v4 08/25] memcg: change defines to an enum Glauber Costa
2012-06-20 13:13 ` Michal Hocko
2012-06-18 10:28 ` [PATCH v4 09/25] kmem slab accounting basic infrastructure Glauber Costa
2012-06-18 10:28 ` [PATCH v4 10/25] slab/slub: struct memcg_params Glauber Costa
2012-06-18 10:28 ` [PATCH v4 11/25] consider a memcg parameter in kmem_create_cache Glauber Costa
2012-06-18 10:28 ` [PATCH v4 12/25] sl[au]b: always get the cache from its page in kfree Glauber Costa
2012-06-18 10:28 ` [PATCH v4 13/25] Add a __GFP_SLABMEMCG flag Glauber Costa
2012-06-18 10:28 ` [PATCH v4 14/25] memcg: kmem controller dispatch infrastructure Glauber Costa
2012-06-18 10:28 ` [PATCH v4 15/25] allow enable_cpu_cache to use preset values for its tunables Glauber Costa
2012-06-18 10:28 ` [PATCH v4 16/25] don't do __ClearPageSlab before freeing slab page Glauber Costa
2012-06-18 10:28 ` [PATCH v4 17/25] skip memcg kmem allocations in specified code regions Glauber Costa
2012-06-18 12:19 ` Kamezawa Hiroyuki
2012-06-18 10:28 ` [PATCH v4 18/25] mm: Allocate kernel pages to the right memcg Glauber Costa
2012-06-18 10:28 ` [PATCH v4 19/25] memcg: disable kmem code when not in use Glauber Costa
2012-06-18 12:22 ` Kamezawa Hiroyuki
2012-06-18 12:26 ` Glauber Costa
2012-06-18 10:28 ` [PATCH v4 20/25] memcg: destroy memcg caches Glauber Costa
2012-06-18 10:28 ` [PATCH v4 21/25] Track all the memcg children of a kmem_cache Glauber Costa
2012-06-18 10:28 ` [PATCH v4 22/25] slab: slab-specific propagation changes Glauber Costa
2012-06-18 10:28 ` [PATCH v4 23/25] memcg: propagate kmem limiting information to children Glauber Costa
2012-06-18 12:37 ` Kamezawa Hiroyuki
2012-06-18 12:43 ` Glauber Costa
2012-06-19 0:16 ` Kamezawa Hiroyuki
2012-06-19 8:35 ` Glauber Costa
2012-06-19 8:54 ` Glauber Costa
2012-06-20 8:59 ` Glauber Costa
2012-06-23 4:19 ` Kamezawa Hiroyuki
2012-06-18 10:28 ` [PATCH v4 24/25] memcg/slub: shrink dead caches Glauber Costa
2012-07-06 15:16 ` Christoph Lameter [this message]
2012-07-20 22:16 ` Glauber Costa
2012-07-25 15:23 ` Christoph Lameter
2012-07-25 18:15 ` Glauber Costa
2012-06-18 10:28 ` [PATCH v4 25/25] Documentation: add documentation for slab tracker for memcg Glauber Costa
2012-06-18 12:10 ` [PATCH v4 00/25] kmem limitation " Kamezawa Hiroyuki
2012-06-18 12:14 ` Glauber Costa
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