linux-kernel - Re: [PATCHSET] blkcg: accumulated blkcg updates

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Message-ID: <20120222220404.GB22536@google.com>
Date:	Wed, 22 Feb 2012 14:04:04 -0800
From:	Tejun Heo <tj@...nel.org>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	axboe@...nel.dk, ctalbott@...gle.com, rni@...gle.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCHSET] blkcg: accumulated blkcg updates

Hello,

On Wed, Feb 22, 2012 at 02:34:29PM -0500, Vivek Goyal wrote:
> This series looks good to me. We just need two more pieces which need
> to be pushed along with this series.
>
> - Do not cleanup all blkg upon policy change. Just reclaim policy
>   data/blkg which belong to policy.
> 
> - per cpu stat allocation from async context. 

Yeah, I'm getting to this now.  Two more things I wanna do are

- Moving stats and configurations to blkg policies instead of putting
  them in blk-cgroup.c and then pipe to cgroup policies.  This will
  require updates to cgroup to allow live removal / addition of cgroup
  files on existing cgroup directories.  Should be doable but I'm a
  bit skeptical cgroup is implementing proper sever mechanism on files
  and if not we're gonna have to implement that first.

- Make enabled policies per-queue.

Thanks.

-- 
tejun
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