From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([208.118.235.92]:38930)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <quintela@redhat.com>) id 1TrFxu-0007om-4p
	for qemu-devel@nongnu.org; Fri, 04 Jan 2013 17:42:14 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <quintela@redhat.com>) id 1TrFxt-0001zI-4d
	for qemu-devel@nongnu.org; Fri, 04 Jan 2013 17:42:14 -0500
Received: from mx1.redhat.com ([209.132.183.28]:15711)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <quintela@redhat.com>) id 1TrFxs-0001z6-Sx
	for qemu-devel@nongnu.org; Fri, 04 Jan 2013 17:42:13 -0500
From: Juan Quintela <quintela@redhat.com>
In-Reply-To: <20130104173550.GB9481@stefanha-thinkpad.redhat.com> (Stefan
	Hajnoczi's message of "Fri, 4 Jan 2013 18:35:50 +0100")
References: <50D2CC22.1060900@linux.vnet.ibm.com>
	<50D3C8AF.7050506@linux.vnet.ibm.com>
	<20130104173550.GB9481@stefanha-thinkpad.redhat.com>
Date: Fri, 04 Jan 2013 23:42:06 +0100
Message-ID: <87623ca7up.fsf@elfo.mitica>
MIME-Version: 1.0
Content-Type: text/plain
Subject: Re: [Qemu-devel] [RFC] lively write vmstate with predictable size
Reply-To: quintela@redhat.com
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Stefan Hajnoczi <stefanha@gmail.com>
Cc: Anthony Liguori <aliguori@us.ibm.com>, Pavel Hrdina <phrdina@redhat.com>, qemu-devel <qemu-devel@nongnu.org>, Dietmar Maurer <dietmar@proxmox.com>, Paolo Bonzini <pbonzini@redhat.com>, Wenchao Xia <xiawenc@linux.vnet.ibm.com>

Stefan Hajnoczi <stefanha@gmail.com> 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.