linux-kernel - Re: [PATCH] blkcg: stop iteration early if root

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Message-ID: <508593D4.20908@kernel.dk>
Date:	Mon, 22 Oct 2012 20:43:32 +0200
From:	Jens Axboe <axboe@...nel.dk>
To:	Jun'ichi Nomura <j-nomura@...jp.nec.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Tejun Heo <tj@...nel.org>, Vivek Goyal <vgoyal@...hat.com>
Subject: Re: [PATCH] blkcg: stop iteration early if root_rl is the only request
 list

On 2012-10-22 03:15, Jun'ichi Nomura wrote:
> __blk_queue_next_rl() finds next request list based on blkg_list
> while skipping root_blkg in the list.
> OTOH, root_rl is special as it may exist even without root_blkg.
> 
> Though the later part of the function handles such a case correctly,
> exiting early is good for readability of the code.

Applied to for-linus, thanks.

-- 
Jens Axboe

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