Red Hat Bugzilla – Bug 724893
RFE: better message when start the guest which CPU comprises flags that host doesn't support
Last modified: 2013-02-21 02:06:44 EST
Description of problem: In virt-manager, assign guest cpu model as Nehalem, then start the guest, pop up error message: Error starting domain: internal error guest CPU is not compatible with host CPU. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. Host cpu flag: # cat /proc/cpuinfo ... model name : Intel(R) Core(TM)2 Quad CPU Q9400 @ 2.66GHz ... flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good aperfmperf pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm tpr_shadow vnmi flexpriority 2. In virt-manager, set the guest cpu model as Nehalem, Apply, then start the guest. 3. Error message will display: Error starting domain: internal error guest CPU is not compatible with host CPU Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/asyncjob.py", line 45, in cb_wrapper callback(asyncjob, *args, **kwargs) File "/usr/share/virt-manager/virtManager/engine.py", line 956, in asyncfunc vm.startup() File "/usr/share/virt-manager/virtManager/domain.py", line 1048, in startup self._backend.create() File "/usr/lib64/python2.6/site-packages/libvirt.py", line 457, in create if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self) libvirtError: internal error guest CPU is not compatible with host CPU Actual results: As above Expected results: Message could be more friendly and report the missing flags Additional info:
Sorry, the pkg are as following: # uname -r 2.6.32-165.el6.x86_64 qemu-kvm-0.12.1.2-2.167.el6.x86_64 libvirt-0.9.3-7.el6.x86_64 virt-manager-0.8.6-4.el6.noarch python-virtinst-0.500.5-3.el6.noarch
The error messages are enhanced with upstream commit: commit a2ba53cf18a9ad252a74a39f45ec3577923f50de Author: Peter Krempa <pkrempa@redhat.com> Date: Tue Apr 17 15:24:47 2012 +0200 cpu: Improve error reporting on incompatible CPUs
Reproduce this issue with libvirt-0.9.10-21.el6_3.3.x86_64. Verified this issue with: libvirt-0.10.0-0rc0.el6.x86_64 virt-manager-0.9.0-14.el6.x86_64 Now the error message is: Error starting domain: unsupported configuration: guest and host CPU are not compatible: Host CPU does not provide required features: popcnt, sse4.2 : Error starting domain: unsupported configuration: guest and host CPU are not compatible: Host CPU does not provide required features: popcnt, sse4.2 Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/asyncjob.py", line 44, in cb_wrapper callback(asyncjob, *args, **kwargs) File "/usr/share/virt-manager/virtManager/asyncjob.py", line 65, in tmpcb callback(*args, **kwargs) File "/usr/share/virt-manager/virtManager/domain.py", line 1063, in startup self._backend.create() File "/usr/lib64/python2.6/site-packages/libvirt.py", line 620, in create if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self) libvirtError: unsupported configuration: guest and host CPU are not compatible: Host CPU does not provide required features: popcnt, sse4.2 So change the bug status to VERIFIED.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHSA-2013-0276.html