From: "Michael S. Tsirkin" <mst@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>,
borntraeger@de.ibm.com, qemu-devel@nongnu.org,
jjherne@linux.vnet.ibm.com
Subject: Re: [Qemu-devel] [PATCH RFC 1/1] virtio: migrate config_vector
Date: Thu, 14 May 2015 11:56:51 +0200 [thread overview]
Message-ID: <20150514095651.GA12939@redhat.com> (raw)
In-Reply-To: <55545BAF.4040701@redhat.com>
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
next prev parent reply other threads:[~2015-05-14 9:57 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-13 14:42 [Qemu-devel] [PATCH RFC 0/1] virtio: fix config_vector migration issues Cornelia Huck
2015-05-13 14:42 ` [Qemu-devel] [PATCH RFC 1/1] virtio: migrate config_vector Cornelia Huck
2015-05-13 14:58 ` Michael S. Tsirkin
2015-05-13 15:03 ` Cornelia Huck
2015-05-13 16:14 ` Michael S. Tsirkin
2015-05-13 18:57 ` Christian Borntraeger
2015-05-13 21:47 ` Michael S. Tsirkin
2015-05-14 9:22 ` Christian Borntraeger
2015-05-14 9:36 ` Michael S. Tsirkin
2015-05-14 10:02 ` Paolo Bonzini
2015-05-14 10:30 ` Christian Borntraeger
2015-05-14 17:00 ` Dr. David Alan Gilbert
2015-05-15 7:08 ` Christian Borntraeger
2015-05-15 7:13 ` Michael S. Tsirkin
2015-05-18 11:26 ` Cornelia Huck
2015-05-18 15:29 ` Cornelia Huck
2015-06-03 11:59 ` Christian Borntraeger
2015-06-03 12:23 ` Michael S. Tsirkin
2015-05-14 8:24 ` Paolo Bonzini
2015-05-14 9:56 ` Michael S. Tsirkin [this message]
2015-05-14 10:04 ` Paolo Bonzini
2015-05-14 10:07 ` Michael S. Tsirkin
2015-05-14 10:09 ` Paolo Bonzini
2015-05-14 10:38 ` Christian Borntraeger
2015-05-14 8:22 ` Paolo Bonzini
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