[Qemu-devel] Re: [PATCH v3 2/3] virtio-pci: Use ioeventfd for virtqueue notify

2010-11-16 Thread Stefan Hajnoczi
On Tue, Nov 16, 2010 at 4:02 PM, Michael S. Tsirkin wrote: > On Fri, Nov 12, 2010 at 01:24:28PM +, Stefan Hajnoczi wrote: >> Virtqueue notify is currently handled synchronously in userspace virtio.   >> This >> prevents the vcpu from executing guest code while hardware emulation code >> handle

[Qemu-devel] Re: [PATCH v3 2/3] virtio-pci: Use ioeventfd for virtqueue notify

2010-11-16 Thread Michael S. Tsirkin
On Fri, Nov 12, 2010 at 01:24:28PM +, 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