From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:60038) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TrP1O-0007QH-CB for qemu-devel@nongnu.org; Sat, 05 Jan 2013 03:22:27 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TrP1N-0001Sf-0W for qemu-devel@nongnu.org; Sat, 05 Jan 2013 03:22:26 -0500 Received: from e28smtp04.in.ibm.com ([122.248.162.4]:59959) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TrP1M-0001RJ-Cs for qemu-devel@nongnu.org; Sat, 05 Jan 2013 03:22:24 -0500 Received: from /spool/local by e28smtp04.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Sat, 5 Jan 2013 13:51:12 +0530 Received: from d28relay04.in.ibm.com (d28relay04.in.ibm.com [9.184.220.61]) by d28dlp01.in.ibm.com (Postfix) with ESMTP id 60240E004B for ; Sat, 5 Jan 2013 13:52:24 +0530 (IST) Received: from d28av05.in.ibm.com (d28av05.in.ibm.com [9.184.220.67]) by d28relay04.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r058MBLa2228536 for ; Sat, 5 Jan 2013 13:52:14 +0530 Received: from d28av05.in.ibm.com (loopback [127.0.0.1]) by d28av05.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r058MCRZ018739 for ; Sat, 5 Jan 2013 19:22:12 +1100 Message-ID: <50E7E27A.8050209@linux.vnet.ibm.com> Date: Sat, 05 Jan 2013 16:21:14 +0800 From: Wenchao Xia MIME-Version: 1.0 References: <50D2CC22.1060900@linux.vnet.ibm.com> <50D3C8AF.7050506@linux.vnet.ibm.com> <20130104173550.GB9481@stefanha-thinkpad.redhat.com> <87623ca7up.fsf@elfo.mitica> In-Reply-To: <87623ca7up.fsf@elfo.mitica> Content-Type: text/plain; charset=GB2312 Content-Transfer-Encoding: 8bit Subject: Re: [Qemu-devel] [RFC] lively write vmstate with predictable size List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: quintela@redhat.com Cc: Anthony Liguori , Pavel Hrdina , Stefan Hajnoczi , qemu-devel , Paolo Bonzini , Dietmar Maurer ÓÚ 2013-1-5 6:42, Juan Quintela дµÀ: > Stefan Hajnoczi wrote: >> On Fri, Dec 21, 2012 at 10:25:51AM +0800, Wenchao Xia wrote: >>> resent the mail to mail-list. >>> ------------------- >>> >>> Hi, Paolo and Juan >>> Currently savevm needs pause vm, and I am working on that make it >>> lively. >> >> What is the benefit over migrating to file? I thought we can already do >> that today? > > Load is faster. > > He wants to "overwrite" the memory, so, if we dirty one page during > migration, it overwrite it, instead of having two copies that only make > the image bigger and slower to load. Problem is that we need a new > "format" to be able to do that. > > Later, Juan. > I guess migration to file makes vm stopped, and lack a step to take snapshot in the end of migration, also the usage seems strange makes me feel something is lacking. I'd like to have: 1 take blk snapshot internal/external lively. 2 take vmstate snapshot internal/external lively. 3 combination. -- Best Regards Wenchao Xia