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Re: [Qemu-devel] [PATCH RFC 1/1] virtio: migrate config_vector
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [PATCH RFC 1/1] virtio: migrate config_vector |
Date: |
Thu, 14 May 2015 11:56:51 +0200 |
On Thu, May 14, 2015 at 10:24:15AM +0200, Paolo Bonzini wrote:
>
>
> On 13/05/2015 18:14, Michael S. Tsirkin wrote:
> > > - AFAICS, there's no easy way to add transport-specific subsections -
> > > and simply adding config_vector in ccw would break compatibility
> >
> > subsections break compatibility too. The only way around that is to set
> > a flag to skip migrating config_vector for old machine types.
>
> That's expected. Subsections break compatibility because sometimes
> breaking migration is better than leaving a broken guest after migration.
>
> Paolo
Right, and what happens is that some devices work kind of okay without
config interrupts? Christian - is this why you are trying to preserve
the broken behaviour for cross-version migration?
--
MST
- Re: [Qemu-devel] [PATCH RFC 1/1] virtio: migrate config_vector, (continued)
- Re: [Qemu-devel] [PATCH RFC 1/1] virtio: migrate config_vector, Michael S. Tsirkin, 2015/05/13
- Re: [Qemu-devel] [PATCH RFC 1/1] virtio: migrate config_vector, Cornelia Huck, 2015/05/13
- Re: [Qemu-devel] [PATCH RFC 1/1] virtio: migrate config_vector, Michael S. Tsirkin, 2015/05/13
- Re: [Qemu-devel] [PATCH RFC 1/1] virtio: migrate config_vector, Christian Borntraeger, 2015/05/13
- Re: [Qemu-devel] [PATCH RFC 1/1] virtio: migrate config_vector, Michael S. Tsirkin, 2015/05/13
- Re: [Qemu-devel] [PATCH RFC 1/1] virtio: migrate config_vector, Christian Borntraeger, 2015/05/14
- Re: [Qemu-devel] [PATCH RFC 1/1] virtio: migrate config_vector, Michael S. Tsirkin, 2015/05/14
- Re: [Qemu-devel] [PATCH RFC 1/1] virtio: migrate config_vector, Paolo Bonzini, 2015/05/14
- Re: [Qemu-devel] [PATCH RFC 1/1] virtio: migrate config_vector, Christian Borntraeger, 2015/05/14
- Re: [Qemu-devel] [PATCH RFC 1/1] virtio: migrate config_vector, Paolo Bonzini, 2015/05/14
- Re: [Qemu-devel] [PATCH RFC 1/1] virtio: migrate config_vector,
Michael S. Tsirkin <=
- Re: [Qemu-devel] [PATCH RFC 1/1] virtio: migrate config_vector, Paolo Bonzini, 2015/05/14
- Re: [Qemu-devel] [PATCH RFC 1/1] virtio: migrate config_vector, Michael S. Tsirkin, 2015/05/14
- Re: [Qemu-devel] [PATCH RFC 1/1] virtio: migrate config_vector, Paolo Bonzini, 2015/05/14
- Re: [Qemu-devel] [PATCH RFC 1/1] virtio: migrate config_vector, Christian Borntraeger, 2015/05/14
Re: [Qemu-devel] [PATCH RFC 1/1] virtio: migrate config_vector, Paolo Bonzini, 2015/05/14