linux-kernel - Re: [PATCH v2] make dm and dm-crypt forward cgroup context (was: dm-crypt parallelization patches)

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Message-ID: <20130522185014.GA17423@redhat.com>
Date:	Wed, 22 May 2013 14:50:14 -0400
From:	Mike Snitzer <snitzer@...hat.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	Jens Axboe <axboe@...nel.dk>, dm-crypt@...ut.de,
	Christian Schmidt <schmidt@...add.de>,
	linux-kernel@...r.kernel.org,
	Christoph Hellwig <hch@...radead.org>, dm-devel@...hat.com,
	Andi Kleen <andi@...stfloor.org>,
	Mikulas Patocka <mpatocka@...hat.com>,
	Vivek Goyal <vgoyal@...hat.com>,
	Milan Broz <gmazyland@...il.com>,
	"Alasdair G. Kergon" <agk@...hat.com>
Subject: Re: [PATCH v2] make dm and dm-crypt forward cgroup context (was:
 dm-crypt parallelization patches)

On Thu, Apr 18 2013 at  1:03pm -0400,
Tejun Heo <tj@...nel.org> wrote:

> Hello, Mike.
> 
> On Thu, Apr 18, 2013 at 12:47:42PM -0400, Mike Snitzer wrote:
> > I see you nack and raise you with: please reconsider in the near term.
> 
> The thing is that percpu-refcnting is already in mostly ready-form, so
> unless this dm series is planned to be merged for v3.10-rc1, I don't
> see the need for a separate near term solution.  Mikulas can just do
> the normal refcnting and cgroup will most likely adopt per-cpu ref
> anyway once percpu-refcnting is in, so it should all fall in places
> pretty quickly.  For devel / testing / whatever, Mikulas can surely
> turn off cgroup, right?

Hey Tejun,

Was wondering: how is percpu-refcounting coming along?  Do you have a
pointer to the code that can be pulled in for use by Mikulas' dm-crypt
changes?

Would be nice to get this stuff sorted out for the 3.11 merge window.

Mike
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