From: "Michael S. Tsirkin" <mst@redhat.com>
To: Paul Brook <paul@codesourcery.com>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Re: [PATCH-RFC 13/13] virtio-net: connect to vhost net backend
Date: Wed, 24 Feb 2010 07:29:25 +0200 [thread overview]
Message-ID: <20100224052925.GA27806@redhat.com> (raw)
In-Reply-To: <201002240314.25631.paul@codesourcery.com>
On Wed, Feb 24, 2010 at 03:14:25AM +0000, Paul Brook wrote:
> > vnet_hdr is IMHO a really bad example to copy from.
> >
> > vnet_hdr leaks into the migration state via n->has_vnet_hdr. What this
> > means is that if you want to migrate from -net tap -net nic,model=virtio
> > to -net user -net nic,model=virtio, it will fail.
> >
> > This is a hard problem to solve in qemu though because it would require
> > that we implement software GSO which so far, no one has stepped up to do.
>
> Or make virtio-net pass this on to the guest, and have that deal with the
> problem.
This is exacly what we do, via feature bits.
> If you implement software GSO, then devices can assume it's always
> present and don't need to probe.
>
> Paul
next prev parent reply other threads:[~2010-02-24 5:32 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1263230079.git.mst@redhat.com>
2010-01-11 17:16 ` [Qemu-devel] [PATCH-RFC 01/13] virtio: export virtqueue structure Michael S. Tsirkin
2010-01-12 22:32 ` [Qemu-devel] " Anthony Liguori
2010-01-25 19:10 ` Michael S. Tsirkin
2010-01-25 19:23 ` Anthony Liguori
2010-01-11 17:17 ` [Qemu-devel] [PATCH-RFC 02/13] kvm: add API to set ioeventfd Michael S. Tsirkin
2010-01-12 22:35 ` [Qemu-devel] " Anthony Liguori
2010-01-25 19:20 ` Michael S. Tsirkin
2010-01-25 19:28 ` Anthony Liguori
2010-01-25 19:28 ` Michael S. Tsirkin
2010-01-25 19:44 ` Anthony Liguori
2010-01-11 17:17 ` [Qemu-devel] [PATCH-RFC 03/13] virtio: add iofd/irqfd support Michael S. Tsirkin
2010-01-12 22:36 ` [Qemu-devel] " Anthony Liguori
2010-01-13 10:50 ` Michael S. Tsirkin
2010-01-11 17:17 ` [Qemu-devel] [PATCH-RFC 04/13] virtio-pci: fill in irqfd/queufd support Michael S. Tsirkin
2010-01-11 17:19 ` [Qemu-devel] [PATCH-RFC 05/13] syborg_virtio: add irqfd/eventfd support Michael S. Tsirkin
2010-01-11 17:20 ` [Qemu-devel] [PATCH-RFC 06/13] s390-virtio: fill in irqfd support Michael S. Tsirkin
2010-01-11 17:20 ` [Qemu-devel] [PATCH-RFC 07/13] virtio: move typedef to qemu-common Michael S. Tsirkin
2010-01-11 17:20 ` [Qemu-devel] [PATCH-RFC 08/13] net/tap: add interface to get device fd Michael S. Tsirkin
2010-01-11 17:22 ` [Qemu-devel] [PATCH-RFC 09/13] tap: add vhost/vhostfd options Michael S. Tsirkin
2010-01-12 22:39 ` [Qemu-devel] " Anthony Liguori
2010-01-13 10:59 ` Michael S. Tsirkin
2010-01-12 22:42 ` Anthony Liguori
2010-01-11 17:22 ` [Qemu-devel] [PATCH-RFC 10/13] tap: add API to retrieve vhost net header Michael S. Tsirkin
2010-01-11 17:23 ` [Qemu-devel] [PATCH-RFC 12/13] virtio: add status change callback Michael S. Tsirkin
2010-01-11 17:23 ` [Qemu-devel] [PATCH-RFC 13/13] virtio-net: connect to vhost net backend Michael S. Tsirkin
2010-01-25 19:58 ` [Qemu-devel] " Anthony Liguori
2010-01-25 20:27 ` Michael S. Tsirkin
2010-01-25 21:00 ` Anthony Liguori
2010-01-25 21:01 ` Michael S. Tsirkin
2010-01-25 21:05 ` Michael S. Tsirkin
2010-01-25 21:11 ` Anthony Liguori
2010-02-24 3:14 ` Paul Brook
2010-02-24 5:29 ` Michael S. Tsirkin [this message]
2010-02-24 11:30 ` Paul Brook
2010-02-24 11:46 ` Michael S. Tsirkin
2010-02-24 12:26 ` Paul Brook
2010-02-24 12:40 ` Michael S. Tsirkin
2010-02-24 15:16 ` Anthony Liguori
2010-02-24 14:51 ` Anthony Liguori
2010-01-11 17:23 ` [Qemu-devel] [PATCH-RFC 11/13] vhost net support Michael S. Tsirkin
2010-01-12 22:45 ` [Qemu-devel] " Anthony Liguori
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