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Re: [Qemu-devel] [PATCH V4 00/22] Multiqueue virtio-net
From: |
Jason Wang |
Subject: |
Re: [Qemu-devel] [PATCH V4 00/22] Multiqueue virtio-net |
Date: |
Thu, 31 Jan 2013 15:00:38 +0800 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130106 Thunderbird/17.0.2 |
On 01/31/2013 02:29 AM, Eric Blake wrote:
> On 01/30/2013 04:12 AM, Jason Wang wrote:
>
>> With this changes, user could start a multiqueue virtio-net device through
>>
>> ./qemu -netdev tap,id=hn0,queues=2,vhost=on -device virtio-net-pci,netdev=hn0
>>
>> Management tools such as libvirt can pass multiple pre-created fds/vhostfds
>> through
>>
>> ./qemu -netdev tap,id=hn0,fds=X:Y,vhostfds=M:N -device
>> virtio-net-pci,netdev=hn0
> Do we really need specific fds= parsing, or can we reuse the existing
> -add-fd command line option to our advantage? I guess what I'm asking
> is how hotplug will work; and if hotplug takes a file name, shouldn't
> the command line also take a name; and if the command line takes a name,
> what's wrong with:
>
> ./qemu -add-fd fdset=1,fd=X -add-fd fdset=2,fd=Y -add-fd fdset=3,fd=M
> -add-fd fdset=4,fd=N -netdev
> tap,id=hn0,fds=/dev/fdset/1:/dev/fdset/2,vhostfds=/dev/fdset/3:/dev/fdset/4
> -device virtio-net-pci,netdev=hn0
>
AFAIK, tap does not support fdset now, so this requirement is beyond the
scope of multiqueue itself. We can do this in the future. Btw does
libvirt support add-fd now?
For hotplug, it just work if you pass multiple file descriptors one by
one through getfd and then use fds=X:Y,vhostfds=M:N.
- [Qemu-devel] [PATCH V4 09/22] net: multiqueue support, (continued)
- [Qemu-devel] [PATCH V4 09/22] net: multiqueue support, Jason Wang, 2013/01/30
- [Qemu-devel] [PATCH V4 11/22] tap: factor out common tap initialization, Jason Wang, 2013/01/30
- [Qemu-devel] [PATCH V4 03/22] net: introduce qemu_get_queue(), Jason Wang, 2013/01/30
- [Qemu-devel] [PATCH V4 14/22] tap: introduce a helper to get the name of an interface, Jason Wang, 2013/01/30
- [Qemu-devel] [PATCH V4 17/22] virtio: introduce virtio_del_queue(), Jason Wang, 2013/01/30
- [Qemu-devel] [PATCH V4 18/22] virtio: add a queue_index to VirtQueue, Jason Wang, 2013/01/30
- [Qemu-devel] [PATCH V4 21/22] virtio-net: migration support for multiqueue, Jason Wang, 2013/01/30
- [Qemu-devel] [PATCH V4 16/22] vhost: multiqueue support, Jason Wang, 2013/01/30
- [Qemu-devel] [PATCH V4 19/22] virtio-net: separate virtqueue from VirtIONet, Jason Wang, 2013/01/30
- [Qemu-devel] [PATCH V4 22/22] virtio-net: compat multiqueue support, Jason Wang, 2013/01/30
- Message not available
Re: [Qemu-devel] [PATCH V4 00/22] Multiqueue virtio-net, Michael S. Tsirkin, 2013/01/31