On Thu, Dec 22, 2016 at 5:01 PM, John Ferlan <jferlan@xxxxxxxxxx> wrote: > > > On 12/21/2016 12:11 PM, Weiwei Jia wrote: >> Hi, >> >> I cannot add iothreads >> (https://libvirt.org/formatdomain.html#elementsIOThreadsAllocation) in >> the libvirt xml configuration file. Once I add >> "<iothreads>4</iothreads>" and other related config for IOthreads into >> the libvirt xml configuration file with virsh command and save it, >> these iothreads related configuration will disappear after I open >> libvirt xml configuration file again for double-check. >> >> The current libvirt xml configuration file is like following. >> > > If I try to just cut-n-paste the following xml into a buffer, then run > virsh define kvm1.xml, I get: > > error: Failed to define domain from kvm1.xml > error: Cannot check QEMU binary /usr/bin/kvm-spice: No such file or > directory > > In order to support iothreads, it requires an "-object iothread"... The > "shortest" command line using qemu-kvm would be "qemu-kvm -object > iothread,id=xxx1", so you could try the same with that > /usr/bin/kvm-spice image and see what you get. > > You could try to figure out from the > /var/cach/libvirt/qemu/capabilities/*.xml files whether or not the > "iothread" object exists... I would think though that the reason why > this is failing for you is that the kvm-spice emulator doesn't have the > required capability (I forget if there's a magic incantation to ask the > emulator image what it supports, especially for objects). Thanks for your suggestions. I have tried your way and the results tell me there are some problems with my libvirt xml configuration file. I think I need to fix it with correct libvirt xml configuration file. Thanks, Weiwei Jia -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list
