linux-kernel - Re: [PATCH] block: eliminate ELEVATOR_INSERT

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Message-ID: <20110330134942.GG17523@htj.dyndns.org>
Date:	Wed, 30 Mar 2011 15:49:42 +0200
From:	Tejun Heo <tj@...nel.org>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	Jens Axboe <axboe@...nel.dk>, Jeff Moyer <jmoyer@...hat.com>,
	Mike Snitzer <snitzer@...hat.com>,
	Markus Trippelsdorf <markus@...ppelsdorf.de>,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
	linux-kernel@...r.kernel.org, Chris Mason <chris.mason@...cle.com>
Subject: Re: [PATCH] block: eliminate ELEVATOR_INSERT_REQUEUE

Hello,

On Wed, Mar 30, 2011 at 09:46:58AM -0400, Vivek Goyal wrote:
> With ordering semantics gone, do we still need to drain the elevator
> before queuing flush at the end of request queue.

No, not at all, which was why I was cheating with front insertion.
Anyways, with Jens' patch posted in this thread, this is no longer a
problem.

Thanks.

-- 
tejun
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