linux-kernel - Re: [PATCH] aio: optimize free kioctx slot search

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Date:	Thu, 26 Dec 2013 07:13:57 -0700
From:	Matthew Wilcox <matthew@....cx>
To:	Gu Zheng <guz.fnst@...fujitsu.com>
Cc:	Benjamin <bcrl@...ck.org>, linux-aio@...ck.org,
	fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] aio: optimize free kioctx slot search

On Thu, Dec 26, 2013 at 06:22:10PM +0800, Gu Zheng wrote:
> to the new free slot if it's smaller than 'next_free'. So that we can
> ensure that the slots before 'next_free' are all used, and the search can start
> from 'next_free' to reduce the search and improve the performance.

Have you benchmarked it?  What kinds of improvements are you seeing?

-- 
Matthew Wilcox				Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours.  We can't possibly take such
a retrograde step."
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