linux-kernel - Re: blk-mq: refactor request allocation

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Message-ID: <5384FC60.1070103@fb.com>
Date:	Tue, 27 May 2014 14:58:08 -0600
From:	Jens Axboe <axboe@...com>
To:	Christoph Hellwig <hch@....de>
CC:	<linux-kernel@...r.kernel.org>
Subject: Re: blk-mq: refactor request allocation

On 05/27/2014 12:59 PM, Christoph Hellwig wrote:
> This series streamlines the request allocation path.
> 

Series looks innocuous enough to me, but it's about a 1.5% performance
drop here with an actual device. These tests are very stable, anything
over ~0.1% is definitely outside of noise. I repeated and rebooted a few
times and tested both, it's persistent. No smoking guns in the profile.

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