From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by nz-out-0506.google.com with SMTP id f1so885382nzc for ; Sat, 24 Feb 2007 17:47:41 -0800 (PST) Message-ID: <4df04b840702241747ne903699w636d37b40351b752@mail.gmail.com> Date: Sun, 25 Feb 2007 09:47:41 +0800 From: "yunfeng zhang" Subject: Re: [PATCH 2.6.20-rc5 1/1] MM: enhance Linux swap subsystem In-Reply-To: <45DE6080.6030904@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> <4df04b840701301852i41687edfl1462c4ca3344431c@mail.gmail.com> <4df04b840702122152o64b2d59cy53afcd43bb24cb7a@mail.gmail.com> <4df04b840702200106q670ff944k118d218fed17b884@mail.gmail.com> <4df04b840702211758t1906083x78fb53b6283349ca@mail.gmail.com> <45DCFDBE.50209@redhat.com> <4df04b840702221831x76626de1rfa70cb653b12f495@mail.gmail.com> <45DE6080.6030904@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: To a two-CPU architecture, its page distribution just like theoretically ABABAB.... So every readahead of A process will create 4 unused readahead pages unless you are sure B will resume soon. Have you ever compared the results among UP, 2 or 4-CPU? -- 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