From mboxrd@z Thu Jan 1 00:00:00 1970 From: Balbir Singh Subject: Re: [PATCH 3/3] Provide control over unmapped pages (v4) Date: Fri, 28 Jan 2011 16:48:33 +0530 Message-ID: <20110128111833.GD5054@balbir.in.ibm.com> References: <20110125051003.13762.35120.stgit@localhost6.localdomain6> <20110125051015.13762.13429.stgit@localhost6.localdomain6> <20110128064851.GB5054@balbir.in.ibm.com> Reply-To: balbir@linux.vnet.ibm.com Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Cc: linux-mm@kvack.org, akpm@linux-foundation.org, npiggin@kernel.dk, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, kosaki.motohiro@jp.fujitsu.com, cl@linux.com, kamezawa.hiroyu@jp.fujitsu.com To: Minchan Kim Return-path: Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org List-Id: kvm.vger.kernel.org * MinChan Kim [2011-01-28 16:24:19]: > > > > But the assumption for LRU order to change happens only if the page > > cannot be successfully freed, which means it is in some way active.. > > and needs to be moved no? > > 1. holded page by someone > 2. mapped pages > 3. active pages > > 1 is rare so it isn't the problem. > Of course, in case of 3, we have to activate it so no problem. > The problem is 2. > 2 is a problem, but due to the size aspects not a big one. Like you said even lumpy reclaim affects it. May be the reclaim code could honour may_unmap much earlier. -- Three Cheers, Balbir -- 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/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: email@kvack.org