Re: [PATCH 2/3] virtio-pci: Use ioeventfd for virtqueue notify

Michael S. Tsirkin
2010-11-11T17:13:07Z

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?

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MST