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Re: [PATCH v0 0/2] virtio-blk and vhost-user-blk cross-device migration
From: |
Dr. David Alan Gilbert |
Subject: |
Re: [PATCH v0 0/2] virtio-blk and vhost-user-blk cross-device migration |
Date: |
Wed, 6 Oct 2021 09:43:52 +0100 |
User-agent: |
Mutt/2.0.7 (2021-05-04) |
* Michael S. Tsirkin (mst@redhat.com) wrote:
> On Wed, Oct 06, 2021 at 09:28:50AM +0100, Dr. David Alan Gilbert wrote:
> > To me it feels the same as the distinction between vhost-kernel and qemu
> > backended virtio that we get in net and others - in principal it's just
> > another implementation.
>
> In net it's actually like this. Same -device, a different netdev.
>
> > A tricky part is guaranteeing the set of visible virtio features between
> > implementations; we have that problem when we use vhost-kernel and run
> > on a newer/older kernel and gain virtio features; the same will be true
> > with vhost-user implementations.
>
> That's not new but yes we need to work on this.
>
> > But this would make the structure of a vhost-user implementation quite
> > different.
> >
> > Dave
>
> Right. That's why I'm reluctant to just add a new device type that
> has special compatibility requirements.
Hmm but there's already another layer of hack^Wabstraction in there isn't there
-
there's already:
virtio-blk-pci
virtio-blk-device
created when the user specifies a virtio-blk device?
Dave
> > >
> > > > > --
> > > > > MST
> > > > >
> > > > --
> > > > Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
> > >
> > --
> > Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
>
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
- Re: [PATCH v0 0/2] virtio-blk and vhost-user-blk cross-device migration, (continued)
- Re: [PATCH v0 0/2] virtio-blk and vhost-user-blk cross-device migration, Michael S. Tsirkin, 2021/10/04
- Re: [PATCH v0 0/2] virtio-blk and vhost-user-blk cross-device migration, Roman Kagan, 2021/10/04
- Re: [PATCH v0 0/2] virtio-blk and vhost-user-blk cross-device migration, Michael S. Tsirkin, 2021/10/05
- Re: [PATCH v0 0/2] virtio-blk and vhost-user-blk cross-device migration, Dr. David Alan Gilbert, 2021/10/05
- Re: [PATCH v0 0/2] virtio-blk and vhost-user-blk cross-device migration, Eduardo Habkost, 2021/10/05
- Re: [PATCH v0 0/2] virtio-blk and vhost-user-blk cross-device migration, Michael S. Tsirkin, 2021/10/05
- Re: [PATCH v0 0/2] virtio-blk and vhost-user-blk cross-device migration, Dr. David Alan Gilbert, 2021/10/06
- Re: [PATCH v0 0/2] virtio-blk and vhost-user-blk cross-device migration, Michael S. Tsirkin, 2021/10/06
- Re: [PATCH v0 0/2] virtio-blk and vhost-user-blk cross-device migration, Dr. David Alan Gilbert, 2021/10/06
- Re: [PATCH v0 0/2] virtio-blk and vhost-user-blk cross-device migration, Michael S. Tsirkin, 2021/10/06
- Re: [PATCH v0 0/2] virtio-blk and vhost-user-blk cross-device migration,
Dr. David Alan Gilbert <=
- Re: [PATCH v0 0/2] virtio-blk and vhost-user-blk cross-device migration, Michael S. Tsirkin, 2021/10/06
- Re: [PATCH v0 0/2] virtio-blk and vhost-user-blk cross-device migration, Dr. David Alan Gilbert, 2021/10/06
- Re: [PATCH v0 0/2] virtio-blk and vhost-user-blk cross-device migration, Michael S. Tsirkin, 2021/10/06
- Re: [PATCH v0 0/2] virtio-blk and vhost-user-blk cross-device migration, Dr. David Alan Gilbert, 2021/10/06
- Re: [PATCH v0 0/2] virtio-blk and vhost-user-blk cross-device migration, Michael S. Tsirkin, 2021/10/06