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

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Message-ID: <alpine.DEB.2.00.1207251331480.4995@router.home>
Date:	Wed, 25 Jul 2012 13:33:16 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Glauber Costa <glommer@...allels.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 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.

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