Hi, On Thu, Jan 20, 2011 at 9:05 PM, Michael S. Tsirkin <m...@redhat.com> wrote:
> When MSI is off, each interrupt needs to be bounced through the io > thread when it's set/cleared, so vhost-net causes more context switches and > higher CPU utilization than userspace virtio which handles networking in > the same thread. > > We'll need to fix this by adding level irq support in kvm irqfd, > for now disable vhost-net in these configurations. > > > This maybe a novice question - Would appreciate it if you can you provide a pointer to documentation or relevant code that explains what is the limitation in supporting level irq support in kvm irqfd. Thanks -Rukhsana
