linux-kernel - Re: [PATCH UPDATED2 11/11] blkcg: unify blkg's for blkcg policies

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Date:	Thu, 16 Feb 2012 14:42:58 -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: [PATCH UPDATED2 11/11] blkcg: unify blkg's for blkcg policies

Hello,

On Wed, Feb 15, 2012 at 12:02:29PM -0500, Vivek Goyal wrote:
> - Cleanup in-place policy data update logic.
> 
> - Do not kill all the groups upon one policy switch. Keep the group around
>   and just kill the policy data of associated policy.
>
> - Get rid if locking complexity and rcu around group removal. Replace with
>   double lock dancing stuff.

Yeap, just sent out this one and fix for stacking.  I'll probably do
the in-place policy update thing next.

> - Fix the per cpu alloc stat alloc mess. This is anyway needed
>   irrespective of cleanup.

I'll ping Andrew again on the mempool thing on more time.

Thanks.

-- 
tejun
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