From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx128.postini.com [74.125.245.128]) by kanga.kvack.org (Postfix) with SMTP id 2FF426B0044 for ; Thu, 22 Nov 2012 21:26:08 -0500 (EST) Date: Fri, 23 Nov 2012 10:25:57 +0800 From: Fengguang Wu Subject: Re: Problem in Page Cache Replacement Message-ID: <20121123022557.GA3954@localhost> References: <1353433362.85184.YahooMailNeo@web141101.mail.bf1.yahoo.com> <20121120182500.GH1408@quack.suse.cz> <1353485020.53500.YahooMailNeo@web141104.mail.bf1.yahoo.com> <1353485630.17455.YahooMailNeo@web141106.mail.bf1.yahoo.com> <50AC9220.70202@gmail.com> <20121121090204.GA9064@localhost> <50ACA209.9000101@gmail.com> <20121122152611.GA11736@localhost> <50AED214.4000701@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <50AED214.4000701@gmail.com> Sender: owner-linux-mm@kvack.org List-ID: To: Jaegeuk Hanse Cc: metin d , Jan Kara , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" Jaegeuk, > Thanks for your response. But which kind of pages are in the special > reserved and which are all-flags-cleared? The all-flags-cleared pages are mostly free pages in the buddy system. The pages with flag "buddy" are also free pages: the buddy system only marks the head pages of each order-2 free range with flag "buddy". The reserved pages come from many sources, they may be set for memory reserved for BIOS, memory holes, offlined memory, or used by some device drivers. Thanks, Fengguang -- 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