On Friday 23 April 2010 12:08:22 David S. Ahern wrote: > After a few days of debugging I think kvmclock is the source of lockups > for a RHEL5.5-based VM. The VM works fine on one host, but repeatedly > locks up on another. > > Server 1 - VM locks up repeatedly > -- DL580 G5 > -- 4 quad-core X7350 processors at 2.93GHz > -- 48GB RAM > > Server 2 - VM works just fine > -- DL380 G6 > -- 2 quad-core E5540 processors at 2.53GHz > -- 24GB RAM > > Both host servers are running Fedora Core 12, 2.6.32.11-99.fc12.x86_64 > kernel. I have tried various versions of qemu-kvm -- the version in > FC-12 and the version for FC-12 in virt-preview. In both cases the > qemu-kvm command line is identical. > > VM > - RHEL5.5, PAE kernel (also tried standard 32-bit) > - 2 vcpus > - 3GB RAM > - virtio network and disk > > When the VM locks up both vcpu threads are spinning at 100%. Changing > the clocksource to jiffies appears to have addressed the problem. Does changing the guest to -smp 1 help? > > David > -- > 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 -- 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
