From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <47836681.8070603@de.ibm.com> Date: Tue, 08 Jan 2008 13:03:13 +0100 From: Carsten Otte Reply-To: carsteno@de.ibm.com MIME-Version: 1.0 Subject: Re: [rfc][patch 0/4] VM_MIXEDMAP patchset with s390 backend References: <476A73F0.4070704@de.ibm.com> <476A7D21.7070607@de.ibm.com> <20071221004556.GB31040@wotan.suse.de> <476B9000.2090707@de.ibm.com> <20071221102052.GB28484@wotan.suse.de> <476B96D6.2010302@de.ibm.com> <20071221104701.GE28484@wotan.suse.de> <1199784954.25114.27.camel@cotte.boeblingen.de.ibm.com> <20080108100803.GA24570@wotan.suse.de> <47835FBE.8080406@de.ibm.com> <20080108115536.GB460@wotan.suse.de> In-Reply-To: <20080108115536.GB460@wotan.suse.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Nick Piggin Cc: carsteno@de.ibm.com, Jared Hulbert , Linux Memory Management List , Martin Schwidefsky , Heiko Carstens List-ID: Nick Piggin wrote: > Oh good. So just to clarify -- I guess you guys have a readonly filesystem > containing the distro on the host, and mount it XIP on each guest... avoiding > struct page means you save a bit of memory on each guest? That's right. It's quite a bit of memory for struct page entries, because we'd love to have an entire distro with a superset of packages for each guest being installed on the filesystem (-- large shared segment). And we're talking 3 digits amount of guests here. This is a real benefit in our scenario. >> But I really really want to exchange patch #4 with a >> pte-bit based one before pushing this. > OK fair enough, let's do that. Thanks, am on it... -- 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