From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx121.postini.com [74.125.245.121]) by kanga.kvack.org (Postfix) with SMTP id 3E0D36B005D for ; Sat, 5 Jan 2013 05:45:43 -0500 (EST) Date: Sat, 5 Jan 2013 11:45:38 +0100 From: Michal Hocko Subject: Re: [PATCH V3 2/8] Make TestSetPageDirty and dirty page accounting in one func Message-ID: <20130105104538.GB24698@dhcp22.suse.cz> References: <1356455919-14445-1-git-send-email-handai.szj@taobao.com> <1356456156-14535-1-git-send-email-handai.szj@taobao.com> <20130102090803.GB22160@dhcp22.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org List-ID: To: Sha Zhengju Cc: linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, dchinner@redhat.com, akpm@linux-foundation.org, kamezawa.hiroyu@jp.fujitsu.com, gthelen@google.com, fengguang.wu@intel.com, glommer@parallels.com, Sha Zhengju On Sat 05-01-13 10:49:00, Sha Zhengju wrote: [...] > >> Here is some test numbers that before/after this patch: > >> Test steps(Mem-4g, ext4): > >> drop_cache; sync > >> fio (ioengine=sync/write/buffered/bs=4k/size=1g/numjobs=2/group_reporting/thread) > > > > Could also add some rationale why you think this test is relevant? > > > > The test is aiming at finding the impact of performance due to lock > contention by writing parallel > to the same file. I'll add the reason next version too. Please make sure to describe which locks are exercised during that test and how much. Thanks [...] -- Michal Hocko SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org