linux-kernel - Re: [PATCH v3 05/16] consider a memcg parameter in kmem_create

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Message-ID: <CAOJsxLGFWQFNUUN3sDeB2sn0S-QM-6Ut_d02HjmF6mB5aMytoA@mail.gmail.com>
Date:	Mon, 24 Sep 2012 18:38:48 +0300
From:	Pekka Enberg <penberg@...nel.org>
To:	Glauber Costa <glommer@...allels.com>
Cc:	Christoph Lameter <cl@...ux.com>, Tejun Heo <tj@...nel.org>,
	"<linux-kernel@...r.kernel.org>" <linux-kernel@...r.kernel.org>,
	"<cgroups@...r.kernel.org>" <cgroups@...r.kernel.org>,
	"<kamezawa.hiroyu@...fujitsu.com>" <kamezawa.hiroyu@...fujitsu.com>,
	"<devel@...nvz.org>" <devel@...nvz.org>,
	"<linux-mm@...ck.org>" <linux-mm@...ck.org>,
	Suleiman Souhlal <suleiman@...gle.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mel Gorman <mgorman@...e.de>,
	David Rientjes <rientjes@...gle.com>,
	Michal Hocko <mhocko@...e.cz>,
	Johannes Weiner <hannes@...xchg.org>
Subject: Re: [PATCH v3 05/16] consider a memcg parameter in kmem_create_cache

On 09/24/2012 05:56 PM, Christoph Lameter wrote:
>> On Mon, 24 Sep 2012, Glauber Costa wrote:
>>
>>> The reason I say it is orthogonal, is that people will still want to see
>>> their caches in /proc/slabinfo, regardless of wherever else they'll be.
>>> It was a requirement from Pekka in one of the first times I posted this,
>>> IIRC.
>>
>> They want to see total counts there true. But as I said we already have a
>> duplication of the statistics otherwise. We have never done the scheme
>> that you propose. That is unexpected. I would not expect the numbers to be
>> there.

On Mon, Sep 24, 2012 at 4:57 PM, Glauber Costa <glommer@...allels.com> wrote:
> I myself personally believe it can potentially clutter slabinfo, and
> won't put my energy in defending the current implementation. What I
> don't want is to keep switching between implementations.
>
> Pekka, Tejun, what do you guys say here?

So Christoph is proposing that the new caches appear somewhere under
the cgroups directory and /proc/slabinfo includes aggregated counts,
right? I'm certainly OK with that.
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