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[Qemu-devel] Re: [PATCH 2/3] virtio-pci: Use ioeventfd for virtqueue not
From: |
Gleb Natapov |
Subject: |
[Qemu-devel] Re: [PATCH 2/3] virtio-pci: Use ioeventfd for virtqueue notify |
Date: |
Thu, 11 Nov 2010 19:55:08 +0200 |
On Thu, Nov 11, 2010 at 07:12:40PM +0200, Michael S. Tsirkin wrote:
> On Thu, Nov 11, 2010 at 06:59:29PM +0200, Avi Kivity wrote:
> > On 11/11/2010 03:47 PM, Stefan Hajnoczi wrote:
> > >Some virtio devices are known to have guest drivers which expect a notify
> > >to be
> > >processed synchronously and spin waiting for completion. Only enable
> > >ioeventfd
> > >for virtio-blk and virtio-net for now.
> >
> > Which drivers are these?
> >
> > I only know of the virtio-gl driver, which isn't upstream.
>
> I think that PXE virtio drivers do polling. But I think this change does
> not break these drivers. It'll probably make them a bit slower. Right,
> Gleb?
>
Can't tell about PXE virtio drivers, but virtio-blk in seabios does
polling.
--
Gleb.
- [Qemu-devel] Re: [PATCH 2/3] virtio-pci: Use ioeventfd for virtqueue notify, (continued)
- [Qemu-devel] Re: [PATCH 2/3] virtio-pci: Use ioeventfd for virtqueue notify, Christoph Hellwig, 2010/11/11
- Re: [Qemu-devel] Re: [PATCH 2/3] virtio-pci: Use ioeventfd for virtqueue notify, Stefan Hajnoczi, 2010/11/12
- Re: [Qemu-devel] Re: [PATCH 2/3] virtio-pci: Use ioeventfd for virtqueue notify, Avi Kivity, 2010/11/14
- Re: [Qemu-devel] Re: [PATCH 2/3] virtio-pci: Use ioeventfd for virtqueue notify, Stefan Hajnoczi, 2010/11/14
- Re: [Qemu-devel] Re: [PATCH 2/3] virtio-pci: Use ioeventfd for virtqueue notify, Avi Kivity, 2010/11/14
- Re: [Qemu-devel] Re: [PATCH 2/3] virtio-pci: Use ioeventfd for virtqueue notify, Avi Kivity, 2010/11/14
- Re: [Qemu-devel] Re: [PATCH 2/3] virtio-pci: Use ioeventfd for virtqueue notify, Stefan Hajnoczi, 2010/11/15
[Qemu-devel] Re: [PATCH 2/3] virtio-pci: Use ioeventfd for virtqueue notify, Avi Kivity, 2010/11/11
[Qemu-devel] [PATCH 3/3] virtio-pci: Don't use ioeventfd on old kernels, Stefan Hajnoczi, 2010/11/11
[Qemu-devel] Re: [PATCH v2 0/3] virtio: Use ioeventfd for virtqueue notify, Michael S. Tsirkin, 2010/11/11