linux-kernel - Re: [patch 2/2]block: recursive merge requests

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Message-ID: <4EEBA705.7060900@kernel.dk>
Date:	Fri, 16 Dec 2011 21:16:05 +0100
From:	Jens Axboe <axboe@...nel.dk>
To:	Christoph Hellwig <hch@...radead.org>
CC:	Shaohua Li <shaohua.li@...el.com>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [patch 2/2]block: recursive merge requests

On 2011-12-16 20:34, Christoph Hellwig wrote:
> On Fri, Dec 16, 2011 at 09:52:43AM +0800, Shaohua Li wrote:
>> With recursive merge below, the workload throughput gets improved 20%
>> and context switch drops 60%.
> 
> What workload and what filesystem?

It shouldn't really matter for the quoted case, where you have 2
processes issuing interleaved reads.

-- 
Jens Axboe

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