linux-kernel - Re: [PATCH v4 24/25] memcg/slub: shrink dead caches

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <501037B0.7060602@parallels.com>
Date:	Wed, 25 Jul 2012 22:15:12 +0400
From:	Glauber Costa <glommer@...allels.com>
To:	Christoph Lameter <cl@...ux.com>
CC:	<linux-mm@...ck.org>, Pekka Enberg <penberg@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	<cgroups@...r.kernel.org>, <devel@...nvz.org>,
	<kamezawa.hiroyu@...fujitsu.com>, <linux-kernel@...r.kernel.org>,
	"Frederic Weisbecker" <fweisbec@...il.com>,
	Suleiman Souhlal <suleiman@...gle.com>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Michal Hocko <mhocko@...e.cz>,
	Johannes Weiner <hannes@...xchg.org>
Subject: Re: [PATCH v4 24/25] memcg/slub: shrink dead caches

On 07/25/2012 07:23 PM, Christoph Lameter wrote:
> On Fri, 20 Jul 2012, Glauber Costa wrote:
> 
>>> 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.
>>>
>> Doesn't the SLAB have a time-based reaper for that?
> 
> Yes but it will take a couple of minutes to drain the caches.
> 
You might have seen in my last submission that included this in the slab
as well.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/