On Tue, Sep 28, 2010 at 04:36:51PM -0600, Eric Blake wrote: > On 09/27/2010 11:20 AM, Eric Blake wrote: > >> > >>Another question I had, is there a way in QEmu to specifiy a different > >>cpu count from the -smp indicating the startup count ? > > > >I wish I knew off-hand, as it would make it easier for me to implement > >when I get to that part of the patch series :) But even if there isn't, > >I think that starting with the maximum via -smp and immediately after > >hot-unplugging to the current count is better than nothing. > > Answering my own question: with qemu 0.12.5, 'qemu -help' lists: > > -smp n[,maxcpus=cpus][,cores=cores][,threads=threads][,sockets=sockets] > set the number of CPUs to 'n' [default=1] > maxcpus= maximum number of total cpus, including > offline CPUs for hotplug etc. > > So it looks like '-smp 1,maxcpus=2' maps nicely to <vcpu > current='1'>2</vcpu>. > > But per tests/qemuhelpdata, qemu 0.11.0 lacks this, so I also have > to code up a qemu feature test. Right but that's good, we can really fully implement this :-) Daniel -- Daniel Veillard | libxml Gnome XML XSLT toolkit http://xmlsoft.org/ daniel@xxxxxxxxxxxx | Rpmfind RPM search engine http://rpmfind.net/ http://veillard.com/ | virtualization library http://libvirt.org/ -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list