From: Gerd Hoffmann <kraxel@redhat.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: dlaor@redhat.com, qemu-devel <qemu-devel@nongnu.org>,
Juan Quintela <quintela@redhat.com>
Subject: Re: [Qemu-devel] Re: Live migration protocol, device features, ABIs and other beasts
Date: Wed, 25 Nov 2009 15:52:40 +0100 [thread overview]
Message-ID: <4B0D44B8.10801@redhat.com> (raw)
In-Reply-To: <20091125140955.GA10575@redhat.com>
On 11/25/09 15:09, Michael S. Tsirkin wrote:
> We were discussing features that are (mostly) not user-visible.
> It is clear that if you have a user-visible change you have
> a different machine, so you can not migrate.
>
> Now if you fix a bug by changing savevm format, without user visible
> changes you *also* can not migrate, but this does not make it into
> feature or make it a good fit for machine description.
Well, it does fit into the machine description IMHO. When you want
migrate to a old qemu version you need to know what the old qemu version
understands, and the machine description for old qemu is a natural fit.
We still could make the use of this information optional though, so
savevm/migration could use either the most recent savevm format
(ignoring DeviceState->savevm_version) or the savevm format matching the
machine type (using DeviceState->savevm_version) depending on what the
user chooses.
cheers,
Gerd
next prev parent reply other threads:[~2009-11-25 14:52 UTC|newest]
Thread overview: 96+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-22 15:03 [Qemu-devel] Live migration protocol, device features, ABIs and other beasts Dor Laor
2009-11-22 15:49 ` Anthony Liguori
2009-11-22 20:22 ` [Qemu-devel] " Paolo Bonzini
2009-11-23 2:17 ` Anthony Liguori
2009-11-23 8:18 ` Paolo Bonzini
2009-11-23 13:04 ` Anthony Liguori
2009-11-23 8:26 ` Gleb Natapov
2009-11-23 9:29 ` Paolo Bonzini
2009-11-23 9:31 ` Gleb Natapov
[not found] ` <m3einp4e7c.fsf@neno.neno>
2009-11-23 12:37 ` Gleb Natapov
[not found] ` <m3iqd14edf.fsf@neno.neno>
2009-11-23 12:36 ` Gleb Natapov
[not found] ` <m3r5rpwcww.fsf@neno.neno>
2009-11-23 14:32 ` Gleb Natapov
2009-11-23 14:51 ` Anthony Liguori
2009-11-23 14:53 ` Gleb Natapov
2009-11-23 15:05 ` Anthony Liguori
2009-11-23 15:22 ` Gleb Natapov
2009-11-23 15:30 ` Paolo Bonzini
2009-11-23 15:32 ` Anthony Liguori
2009-11-23 15:49 ` Gleb Natapov
2009-11-23 16:09 ` Anthony Liguori
2009-11-23 16:15 ` Gleb Natapov
2009-11-23 16:19 ` Anthony Liguori
[not found] ` <m33a45s009.fsf@neno.neno>
2009-11-23 16:05 ` Gleb Natapov
2009-11-23 16:10 ` Anthony Liguori
2009-11-24 13:28 ` Michael S. Tsirkin
2009-11-23 13:01 ` Anthony Liguori
[not found] ` <m3vdh1wd0n.fsf@neno.neno>
2009-11-23 14:49 ` Anthony Liguori
2009-11-23 15:21 ` Eduardo Habkost
2009-11-23 16:16 ` Anthony Liguori
2009-11-23 17:08 ` Eduardo Habkost
2009-11-23 18:28 ` Anthony Liguori
2009-11-23 19:24 ` Eduardo Habkost
2009-11-23 19:49 ` Anthony Liguori
2009-11-23 21:21 ` Eduardo Habkost
2009-11-24 11:00 ` Dor Laor
[not found] ` <m3y6lxqkpv.fsf@neno.neno>
2009-11-23 16:44 ` Anthony Liguori
[not found] ` <m3zl6db11z.fsf@neno.neno>
2009-11-23 18:44 ` Anthony Liguori
2009-11-23 20:24 ` Eduardo Habkost
2009-11-24 13:39 ` Michael S. Tsirkin
2009-11-23 13:51 ` Eduardo Habkost
2009-11-23 14:21 ` Paolo Bonzini
2009-11-23 15:00 ` Anthony Liguori
2009-11-23 15:37 ` Eduardo Habkost
2009-11-23 15:02 ` Eduardo Habkost
2009-11-23 15:12 ` Anthony Liguori
2009-11-24 14:26 ` [Qemu-devel] " Michael S. Tsirkin
2009-11-23 14:53 ` [Qemu-devel] " Anthony Liguori
2009-11-24 14:28 ` [Qemu-devel] " Michael S. Tsirkin
2009-11-24 14:33 ` [Qemu-devel] " Anthony Liguori
2009-11-24 16:05 ` Michael S. Tsirkin
[not found] ` <m3skc2r66t.fsf@neno.neno>
2009-11-25 16:28 ` Michael S. Tsirkin
2009-11-24 13:17 ` [Qemu-devel] " Michael S. Tsirkin
2009-11-24 13:35 ` Paul Brook
2009-11-24 13:49 ` [Qemu-devel] " Michael S. Tsirkin
2009-11-24 13:59 ` [Qemu-devel] " Paul Brook
2009-11-24 14:21 ` Michael S. Tsirkin
2009-11-24 17:06 ` Blue Swirl
2009-11-24 17:08 ` Michael S. Tsirkin
2009-11-24 17:43 ` Paolo Bonzini
2009-11-24 18:51 ` Anthony Liguori
2009-11-24 18:56 ` Blue Swirl
2009-11-24 19:24 ` Anthony Liguori
2009-11-24 18:57 ` Paolo Bonzini
2009-11-24 19:29 ` Anthony Liguori
2009-11-24 20:01 ` Michael S. Tsirkin
[not found] ` <m3my2ct2qe.fsf@neno.neno>
2009-11-24 17:41 ` Paolo Bonzini
2009-11-24 13:21 ` Michael S. Tsirkin
2009-11-24 13:45 ` Anthony Liguori
2009-11-24 13:55 ` Michael S. Tsirkin
2009-11-23 12:15 ` Juan Quintela
2009-11-23 13:09 ` Anthony Liguori
2009-11-23 14:13 ` Juan Quintela
2009-11-24 14:05 ` Michael S. Tsirkin
2009-11-24 14:20 ` Juan Quintela
2009-11-24 14:35 ` Michael S. Tsirkin
2009-11-25 13:42 ` Gerd Hoffmann
2009-11-25 13:42 ` Michael S. Tsirkin
2009-11-25 14:10 ` Gerd Hoffmann
2009-11-25 14:09 ` Michael S. Tsirkin
2009-11-25 14:52 ` Gerd Hoffmann [this message]
2009-11-26 18:03 ` Andrea Arcangeli
2009-11-25 13:36 ` Gerd Hoffmann
2009-11-25 13:40 ` Michael S. Tsirkin
2009-11-25 13:59 ` Gerd Hoffmann
2009-11-25 14:03 ` Michael S. Tsirkin
2009-11-25 14:53 ` Juan Quintela
2009-11-25 15:01 ` Michael S. Tsirkin
2009-11-24 10:39 ` Dor Laor
2009-11-24 14:01 ` Michael S. Tsirkin
2009-11-24 14:21 ` Juan Quintela
2009-11-24 14:38 ` Michael S. Tsirkin
2009-11-24 16:05 ` Michael S. Tsirkin
2009-11-25 9:30 ` Juan Quintela
2009-11-25 9:32 ` Michael S. Tsirkin
2009-11-25 13:36 ` Juan Quintela
2009-11-24 13:59 ` Michael S. Tsirkin
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