From: Anthony Liguori <anthony@codemonkey.ws>
To: Paul Brook <paul@codesourcery.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>,
Jan Kiszka <jan.kiszka@siemens.com>,
qemu-devel@nongnu.org, Markus Armbruster <armbru@redhat.com>,
Gerd Hoffmann <kraxel@redhat.com>, Avi Kivity <avi@redhat.com>
Subject: Re: [Qemu-devel] Re: [PATCH 0/4] Machine config files
Date: Mon, 06 Jul 2009 18:13:26 -0500 [thread overview]
Message-ID: <4A528516.4020402@codemonkey.ws> (raw)
In-Reply-To: <200907062339.43850.paul@codesourcery.com>
Paul Brook wrote:
>> Most importantly, machine config should not be sent until non-live
>> migration kicks in. At this point, the device tree is stable because
>> the guest isn't running. The device tree should be the first section
>> saved for non-live migration.
>>
>
> RAM is part of the machine config, and can be hotplugged[1], so you need at
> least that before you start transferring anything.
>
You really don't. The ram_load_live handler should receive RAM as it
comes in and maintain a growable buffer for all the independently
transferred regions. A nice property of live migration is that you'll
get the whole region at once so something simple based on realloc() will
work well.
When it comes time to create the virtual machine, you have memory
buffers ready to be used as the guest's memory. If it's not sized
appropriately, you throw an error and migration aborts.
Regards,
Anthony Liguori
next prev parent reply other threads:[~2009-07-06 23:13 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-10 17:38 [Qemu-devel] [PATCH 0/4] Machine config files Paul Brook
2009-06-10 17:38 ` [Qemu-devel] [PATCH 1/4] Include and build libfdt Paul Brook
2009-06-10 19:08 ` Glauber Costa
2009-06-10 19:23 ` Anthony Liguori
2009-06-10 19:27 ` Paul Brook
2009-06-10 19:41 ` Glauber Costa
2009-06-10 20:38 ` Paul Brook
2009-06-10 22:32 ` Edgar E. Iglesias
2009-06-10 19:34 ` Blue Swirl
2009-06-10 17:38 ` [Qemu-devel] [PATCH 2/4] Add device tree machine Paul Brook
2009-06-10 18:30 ` Blue Swirl
2009-06-10 19:10 ` Paul Brook
2009-06-11 13:22 ` Gerd Hoffmann
2009-06-11 13:33 ` Gerd Hoffmann
2009-06-11 13:39 ` Paul Brook
2009-06-11 14:22 ` Gerd Hoffmann
2009-06-12 16:25 ` Markus Armbruster
2009-06-10 17:38 ` [Qemu-devel] [PATCH 3/4] Stellaris machine config Paul Brook
2009-06-11 8:21 ` M P
2009-06-11 16:32 ` Jamie Lokier
2009-06-12 8:29 ` Gerd Hoffmann
2009-06-12 13:56 ` Markus Armbruster
2009-06-12 13:53 ` Markus Armbruster
2009-06-12 15:25 ` Jamie Lokier
2009-06-10 17:38 ` [Qemu-devel] [PATCH 4/4] Integrator " Paul Brook
2009-06-11 9:54 ` [Qemu-devel] [PATCH 0/4] Machine config files Gerd Hoffmann
2009-06-11 12:53 ` Gerd Hoffmann
2009-06-11 13:18 ` Paul Brook
2009-06-11 14:35 ` Gerd Hoffmann
2009-06-12 7:51 ` Kevin Wolf
2009-06-12 13:49 ` Markus Armbruster
2009-06-12 14:22 ` Kevin Wolf
2009-06-12 14:40 ` Markus Armbruster
2009-06-12 15:02 ` Anthony Liguori
2009-06-12 15:29 ` Kevin Wolf
2009-06-12 16:35 ` Blue Swirl
2009-06-12 13:37 ` Markus Armbruster
2009-06-12 14:44 ` Gerd Hoffmann
2009-06-12 15:58 ` Markus Armbruster
2009-06-12 16:11 ` [Qemu-devel] " Jan Kiszka
2009-07-06 12:49 ` Michael S. Tsirkin
2009-07-06 13:43 ` Gerd Hoffmann
2009-07-06 13:56 ` Michael S. Tsirkin
2009-07-06 14:01 ` Michael S. Tsirkin
2009-07-06 14:40 ` Gerd Hoffmann
2009-07-06 16:12 ` Avi Kivity
2009-07-06 16:27 ` Gerd Hoffmann
2009-07-06 16:37 ` Avi Kivity
2009-07-06 16:44 ` Michael S. Tsirkin
2009-07-07 4:47 ` Avi Kivity
2009-07-06 16:47 ` Paul Brook
2009-07-07 5:01 ` Avi Kivity
2009-07-06 17:28 ` Anthony Liguori
2009-07-06 22:39 ` Paul Brook
2009-07-06 23:13 ` Anthony Liguori [this message]
2009-07-07 5:00 ` Avi Kivity
2009-07-07 5:23 ` Avi Kivity
2009-07-07 4:56 ` Avi Kivity
2009-07-07 6:19 ` Michael S. Tsirkin
2009-07-06 14:24 ` Gerd Hoffmann
2009-07-06 14:31 ` Michael S. Tsirkin
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