From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by wx-out-0506.google.com with SMTP id s8so352553wxc for ; Thu, 22 Feb 2007 18:31:14 -0800 (PST) Message-ID: <4df04b840702221831x76626de1rfa70cb653b12f495@mail.gmail.com> Date: Fri, 23 Feb 2007 10:31:13 +0800 From: "yunfeng zhang" Subject: Re: [PATCH 2.6.20-rc5 1/1] MM: enhance Linux swap subsystem In-Reply-To: <45DCFDBE.50209@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <4df04b840701212309l2a283357jbdaa88794e5208a7@mail.gmail.com> <4df04b840701222021w5e1aaab2if2ba7fc38d06d64b@mail.gmail.com> <4df04b840701222108o6992933bied5fff8a525413@mail.gmail.com> <4df04b840701301852i41687edfl1462c4ca3344431c@mail.gmail.com> <4df04b840702122152o64b2d59cy53afcd43bb24cb7a@mail.gmail.com> <4df04b840702200106q670ff944k118d218fed17b884@mail.gmail.com> <4df04b840702211758t1906083x78fb53b6283349ca@mail.gmail.com> <45DCFDBE.50209@redhat.com> Sender: owner-linux-mm@kvack.org Return-Path: To: Rik van Riel Cc: linux-kernel@vger.kernel.org, Hugh Dickins , linux-mm@kvack.org List-ID: Performance improvement should occur when private pages of multiple processes are messed up, such as SMP. To UP, my previous mail is done by timer, which only shows a fact, if pages are messed up fully, current readahead will degrade remarkably, and unused readaheading pages make a burden to memory subsystem. You should re-test your testcases following the advises on Linux without my patch, do normal testcases and select a testcase randomly and record '/proc/vmstat/pswpin', redo the testcase solely, if the results are close, that is, your testcases doesn't messed up private pages at all as you expected due to Linux schedule. Thank you! 2007/2/22, Rik van Riel : > yunfeng zhang wrote: > > Any comments or suggestions are always welcomed. > > Same question as always: what problem are you trying to solve? -- 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