linux-kernel - Re: [PATCH] block/blk-cgroup.c: free per-blkcg data when freeing the blkcg

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Date:	Tue, 07 Jul 2015 07:49:41 -0600
From:	Jens Axboe <axboe@...nel.dk>
To:	Arianna Avanzini <avanzini.arianna@...il.com>,
	linux-kernel@...r.kernel.org
CC:	kaminsky@...cmu.edu
Subject: Re: [PATCH] block/blk-cgroup.c: free per-blkcg data when freeing
 the blkcg

On 07/06/2015 07:08 PM, Arianna Avanzini wrote:
> Currently, per-blkcg data is freed each time a policy is deactivated,
> that is also upon scheduler switch. However, when switching from a
> scheduler implementing a policy which requires per-blkcg data to
> another one, that same policy might be active on other devices, and
> therefore those same per-blkcg data could be still in use.
> This commit lets per-blkcg data be freed when the blkcg is freed
> instead of on policy deactivation.
>
> Signed-off-by: Arianna Avanzini <avanzini.arianna@...il.com>
> Reported-and-tested-by: Michael Kaminsky <kaminsky@...cmu.edu>
> Fixes: e48453c3 ("block, cgroup: implement policy-specific per-blkcg data")

Thanks Arianna, applied! Hopefully this is the end of the per-policy 
data issues for 4.2.

-- 
Jens Axboe

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