linux-kernel - Re: [PATCH 05/10] slab: allow enable_cpu_cache to use preset values for its tunables

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Message-ID: <501039F9.7040309@parallels.com>
Date:	Wed, 25 Jul 2012 22:24:57 +0400
From:	Glauber Costa <glommer@...allels.com>
To:	Christoph Lameter <cl@...ux.com>
CC:	<linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>,
	Pekka Enberg <penberg@...nel.org>,
	Greg Thelen <gthelen@...gle.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Michal Hocko <mhocko@...e.cz>,
	Frederic Weisbecker <fweisbec@...il.com>, <devel@...nvz.org>,
	<cgroups@...r.kernel.org>, Pekka Enberg <penberg@...helsinki.fi>,
	Kamezawa Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Suleiman Souhlal <suleiman@...gle.com>
Subject: Re: [PATCH 05/10] slab: allow enable_cpu_cache to use preset values
 for its tunables

On 07/25/2012 09:05 PM, Christoph Lameter wrote:
> On Wed, 25 Jul 2012, Glauber Costa wrote:
> 
>> SLAB allows us to tune a particular cache behavior with tunables.
>> When creating a new memcg cache copy, we'd like to preserve any tunables
>> the parent cache already had.
> 
> So does SLUB but I do not see a patch for that allocator.
> 
It is certainly not through does the same method as SLAB, right ?
Writing to /proc/slabinfo gives me an I/O error
I assume it is something through sysfs, but schiming through the code
now, I can't find any per-cache tunables. Would you mind pointing me to
them?

In any case, are you happy with the SLAB one, and how they are propagated?

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