http://docs.ganeti.org/ganeti/2.2/html/install.html "For optimum performance when running both CPU and I/O intensive instances, it’s also recommended that the dom0 is restricted to one CPU only, for example by booting with the kernel parameter nosmp."
Also this benchmarking advises disable smp http://web2.clarkson.edu/class/cs644/xen/files/repeatedxen-usenix04.pdf 2011/8/10 Ben Hutchings <b...@decadent.org.uk> > On Wed, 2011-08-10 at 16:51 +0400, Konstantin Alekseev wrote: > > Package: xen-linux-system-2.6.32-5-xen-amd64 > > Version: 2.6.32-35 > > Severity: normal > > > > > > With kernel options 'nosmp' dom0 hang > [...] > > Why does this matter to you? > > Ben. > > -- Konstantin
