Limiting the Dom0 number of cpus to 1 in /etc/xend-confix.xsp (dom0-cpus 1) cures the problem.
Additional I've pinned Domain-0 vcpu0 to cpu0 (xm vcpu-pin 0 0 0) but this is not neccessary. # xm vcpu-list Name ID VCPUs CPU State Time(s) CPU Affinity Domain-0 0 0 0 r-- 52.5 0 Domain-0 0 1 - --p 2.1 any cpu Domain-0 0 2 - --p 1.4 any cpu Domain-0 0 3 - --p 1.4 any cpu The Debian kernel linux-image-2.6.18-4-xen-amd64 (2.6.18.dfsg.1-10snapshot.8256) seems to have problems with SMP when running as Dom0 Gerald -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]