[Pkg-libvirt-maintainers] Bug#731815: virsh: Unable to start any VM with custom cpu model

[Thomas Rechberger]

That is totally working for me, thank you so much for the find.

Am 28.10.2014 18:33, schrieb Ariel Malves:
> Hi,
>
> I faced a similar problem when upgrading libvirt/qemu packages from
> wheezy to wheezy-backports. Try to delete
> /var/cache/libvirt/qemu/capabilities and restart libvirt-bin.
>
> []'s
>
> Ariel
>
> On 10/27/2014 02:38 PM, Thomas Rechberger wrote:
>> Same problem after changing from wheezy to jessie.
>>
>> virt-install --name test --memory 1024 --nodisk --pxe --cpu host
>> ERROR    internal error: Cannot find suitable CPU model for given data
>>
>> libvirtd log:
>> Preferred CPU model Opteron_G3 not allowed by hypervisor; closest
>> supported model will be used
>>
>> has it anything to do with wrong detected cpu flags? I am using AMD
>> Kabini cpu and Opteron G3 map is used both under wheezy and jessie.
>>
>> virsh capabilities > /tmp/capabilities.xml
>> root at kvm:/# virsh cpu-compare /tmp/capabilities.xml
>> CPU described in /tmp/capabilities.xml is identical to host CPU
>>
>> gir1.2-libvirt-glib-1.0:amd64/jessie 0.1.7-2.1 uptodate
>> libvirt-bin:amd64/jessie 1.2.9-3 uptodate
>> libvirt-clients:amd64/jessie 1.2.9-3 uptodate
>> libvirt-daemon:amd64/jessie 1.2.9-3 uptodate
>> libvirt-daemon-system:amd64/jessie 1.2.9-3 uptodate
>> libvirt-glib-1.0-0:amd64/jessie 0.1.7-2.1 uptodate
>> libvirt0:amd64/jessie 1.2.9-3 uptodate
>>
>> cat /proc/cpuinfo
>> processor : 0
>> vendor_id : AuthenticAMD
>> cpu family : 22
>> model : 0
>> model name : AMD Sempron(tm) 3850 APU with Radeon(tm) R3
>> stepping : 1
>> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
>> pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt
>> pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc extd_apicid
>> aperfmperf eagerfpu pni pclmulqdq monitor ssse3 cx16 sse4_1 sse4_2
>> movbe popcnt aes xsave avx f16c lahf_lm cmp_legacy svm extapic
>> cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt
>> topoext perfctr_nb perfctr_l2 arat xsaveopt hw_pstate proc_feedback
>> npt lbrv svm_lock nrip_save tsc_scale flushbyasid decodeassists
>> pausefilter pfthreshold bmi1
>>
>> virsh -r capabilities shows me additional invtsc osxsave feature which
>> the older version didnt had.
>>
>> Here was mentioned a kernel update fixed it:
>> https://bbs.archlinux.org/viewtopic.php?id=182142
>> What it has to do with kernel version?
>>
>