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Re: [Qemu-devel] [PATCH for-1.6] pc: fix up pc initialization
From: |
Anthony Liguori |
Subject: |
Re: [Qemu-devel] [PATCH for-1.6] pc: fix up pc initialization |
Date: |
Tue, 13 Aug 2013 11:12:46 -0500 |
User-agent: |
Notmuch/0.15.2+202~g0c4b8aa (http://notmuchmail.org) Emacs/23.3.1 (x86_64-pc-linux-gnu) |
Andreas Färber <address@hidden> writes:
> Am 13.08.2013 17:27, schrieb Paolo Bonzini:
>> Il 13/08/2013 17:11, Andreas Färber ha scritto:
>>>
>>> mst suggested to patch stable-1.5 to disable it there, too. I am not
>>> against but have doubts as to how well that works with migration, since
>>> 1.5.3 is still a bit off and I would expect 1.5.2 -> 1.6.0 migration to
>>> work without guest-visible changes... We could argue that having to use
>>> -M pc-i440fx-1.5 we can also expect users to add -device pvpanic;
>>> question would be how to convey that knowledge of
>>> if-you-use-pc-x.y-then-you-also-need-to-do-Z to users, which
>>> compat_props usually handle under the hood. We could misuse
>>> pvpanic.ioport=0 for that purpose until we have a better solution.
>>
>> pvpanic has no vmstate though, has it? So it won't break migration
>> (needs testing of course).
>
> Just checked, you're right, it doesn't. I somehow assumed it would.
>
>> All that should happen is that after migration you will not get panic
>> notifications on the destination.
>
> Well, how does the Linux driver cope with pvpanic device present on boot
> but not present on panic? ISA PIO is not usually expected to be
> hot-unplugged. ;)
Yeah, disappearing doesn't seem acceptable to me.
We made a mistake with 1.5, now we have to live with it.
Regards,
Anthony Liguori
>
> Andreas
>
> --
> SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany
> GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer; HRB 16746 AG Nürnberg
- [Qemu-devel] [PATCH for-1.6] pc: fix up pc initialization, Michael S. Tsirkin, 2013/08/13
- Re: [Qemu-devel] [PATCH for-1.6] pc: fix up pc initialization, Eric Blake, 2013/08/13
- Re: [Qemu-devel] [PATCH for-1.6] pc: fix up pc initialization, Anthony Liguori, 2013/08/13
- Re: [Qemu-devel] [PATCH for-1.6] pc: fix up pc initialization, Paolo Bonzini, 2013/08/13
- Re: [Qemu-devel] [PATCH for-1.6] pc: fix up pc initialization, Andreas Färber, 2013/08/13
- Re: [Qemu-devel] [PATCH for-1.6] pc: fix up pc initialization, Michael S. Tsirkin, 2013/08/13
- Re: [Qemu-devel] [PATCH for-1.6] pc: fix up pc initialization, Paolo Bonzini, 2013/08/13
- Re: [Qemu-devel] [PATCH for-1.6] pc: fix up pc initialization, Andreas Färber, 2013/08/13
- Re: [Qemu-devel] [PATCH for-1.6] pc: fix up pc initialization,
Anthony Liguori <=
- Re: [Qemu-devel] [PATCH for-1.6] pc: fix up pc initialization, Paolo Bonzini, 2013/08/18