On 03/14/2012 10:29 AM, Wen Congyang wrote: > At 03/13/2012 06:47 PM, Avi Kivity Wrote: > > On 03/13/2012 11:18 AM, Daniel P. Berrange wrote: > >> On Mon, Mar 12, 2012 at 12:33:33PM +0200, Avi Kivity wrote: > >>> On 03/12/2012 11:04 AM, Wen Congyang wrote: > >>>> Do you have any other comments about this patch? > >>>> > >>> > >>> Not really, but I'm not 100% convinced the patch is worthwhile. It's > >>> likely to only be used by Linux, which has kexec facilities, and you can > >>> put talk to management via virtio-serial and describe the crash in more > >>> details than a simple hypercall. > >> > >> As mentioned before, I don't think virtio-serial is a good fit for this. > >> We want something that is simple & guaranteed always available. Using > >> virtio-serial requires significant setup work on both the host and guest. > > > > So what? It needs to be done anyway for the guest agent. > > > >> Many management application won't know to make a vioserial device available > >> to all guests they create. > > > > Then they won't know to deal with the panic event either. > > > >> Most administrators won't even configure kexec, > >> let alone virtio serial on top of it. > > > > It should be done by the OS vendor, not the individual admin. > > > >> The hypercall requires zero host > >> side config, and zero guest side config, which IMHO is what we need for > >> this feature. > > > > If it was this one feature, yes. But we keep getting more and more > > features like that and we bloat the hypervisor. There's a reason we > > have a host-to-guest channel, we should use it. > > > > I donot know how to use virtio-serial. I don't either, copying Amit. > I start vm like this: > qemu ...\ > -device virtio-serial \ > -chardev socket,path=/tmp/foo,server,nowait,id=foo \ > -device virtserialport,chardev=foo,name=port1 ... > > You said that there are too many channels. Does it mean /tmp/foo is a channel? Probably. -- error compiling committee.c: too many arguments to function -- 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
