On Wed, Sep 28, 2011 at 12:19:09PM +0200, Reeted wrote: > On 09/28/11 11:53, Daniel P. Berrange wrote: > >On Wed, Sep 28, 2011 at 11:49:01AM +0200, Reeted wrote: > >>YES! > >>It's the vhost. With vhost=on it takes about 12 seconds more time to boot. > >> > >>...meaning? :-) > >I've no idea. I was always under the impression that 'vhost=on' was > >the 'make it go much faster' switch. So something is going wrong > >here that I cna't explain. > > > >Perhaps one of the network people on this list can explain... > > > > > >To turn vhost off in the libvirt XML, you should be able to use > ><driver name='qemu'/> for the interface in question,eg > > > > > > <interface type='user'> > > <mac address='52:54:00:e5:48:58'/> > > <model type='virtio'/> > > <driver name='qemu'/> > > </interface> > > > Ok that seems to work: it removes the vhost part in the virsh launch > hence cutting down 12secs of boot time. > > If nobody comes out with an explanation of why, I will open another > thread on the kvm list for this. I would probably need to test disk > performance on vhost=on to see if it degrades or it's for another > reason that boot time is increased. Be sure to CC the qemu-devel mailing list too next time, since that has a wider audience who might be able to help Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :| -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
