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Re: [Qemu-devel] cpuid problem in upstream qemu with kvm


From: Markus Armbruster
Subject: Re: [Qemu-devel] cpuid problem in upstream qemu with kvm
Date: Mon, 11 Jan 2010 14:26:06 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux)

Avi Kivity <address@hidden> writes:

> On 01/07/2010 02:33 PM, Anthony Liguori wrote:
>>
>> There's another option.
>>
>> Make cpuid information part of live migration protocol, and then
>> support something like -cpu Xeon-3550.  We would remember the exact
>> cpuid mask we present to the guest and then we could validate that
>> we can obtain the same mask on the destination.
>
> Currently, our policy is to only migrate dynamic (from the guest's
> point of view) state, and specify static state on the command line
> [1].
>
> I think your suggestion makes a lot of sense, but I'd like to expand
> it to move all guest state, whether dynamic or static.  So '-m 1G'
> would be migrated as well (but not -mem-path).  Similarly, in -drive
> file=...,if=ide,index=1, everything but file=... would be migrated.

Becomes a bit clearer with the new way to configure stuff:

  -drive if=none,id=DRIVE-ID,...        <--- host, don't migrate
  -device ide=drive,drive=DRIVE-ID,...  <--- guest, do migrate

[...]




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