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

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Message-ID: <50114E05.1040201@parallels.com>
Date:	Thu, 26 Jul 2012 18:02:45 +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 10:33 PM, Christoph Lameter wrote:
> On Wed, 25 Jul 2012, Glauber Costa wrote:
> 
>> 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?
> 
> The slab attributes in /sys/kernel/slab/<slabname>/<attr> can be modified
> for some values. I think that could be the default method for the future
> since it allows easy addition of new tunables as needed.
> 

Christoph, would the following PoC patch be enough?



View attachment "0001-slub-propagation.patch" of type "text/x-patch" (1191 bytes)