Re: [Qemu-devel] Re: [PATCH v4 2/4] virtio-pci: Use ioeventfd for virtqueue notify

2010-12-12 Thread Stefan Hajnoczi
On Sun, Dec 12, 2010 at 11:22 AM, Michael S. Tsirkin wrote: > On Wed, Nov 17, 2010 at 04:19:27PM +, Stefan Hajnoczi wrote: >> Virtqueue notify is currently handled synchronously in userspace virtio.   >> This >> prevents the vcpu from executing guest code while hardware emulation code >> handl

[Qemu-devel] Re: [PATCH v4 2/4] virtio-pci: Use ioeventfd for virtqueue notify

2010-12-12 Thread Michael S. Tsirkin
On Wed, Nov 17, 2010 at 04:19:27PM +, Stefan Hajnoczi wrote: > Virtqueue notify is currently handled synchronously in userspace virtio. This > prevents the vcpu from executing guest code while hardware emulation code > handles the notify. > > On systems that support KVM, the ioeventfd mechani