From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753210Ab3LZOOA (ORCPT ); Thu, 26 Dec 2013 09:14:00 -0500 Received: from palinux.external.hp.com ([192.25.206.14]:41273 "EHLO mail.parisc-linux.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753177Ab3LZON7 (ORCPT ); Thu, 26 Dec 2013 09:13:59 -0500 Date: Thu, 26 Dec 2013 07:13:57 -0700 From: Matthew Wilcox To: Gu Zheng Cc: Benjamin , linux-aio@kvack.org, fsdevel , linux-kernel Subject: Re: [PATCH] aio: optimize free kioctx slot search Message-ID: <20131226141356.GH11091@parisc-linux.org> References: <52BC0352.2040504@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <52BC0352.2040504@cn.fujitsu.com> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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."