[CentOS-virt] Masking CPU flags via libvirt xml not working?
Sven Kieske
S.Kieske at mittwald.de
Mon Sep 1 09:29:08 UTC 2014
Hi,
I guess this is the wrong approach:
Libvirt does manage cpu type in an xml file,
you would have to alter this xml file:
/usr/share/libvirt/cpu_map.xml
HTH
PS: Maybe add an feature request upstream
to enable this for all libvirt users?
I have seen this request quite some time
on different mailing lists.
Am 27.08.2014 20:08, schrieb Nathan March:
> On 8/26/2014 4:52 PM, Nathan March wrote:
>>
>> Has anyone here managed to get cpu masking working via libvirt?
>> Intention to enable VM migrations between hosts of a different CPU
>> generation.
>>
>
> To add to this, I've tried using the boot options to set the cpu mask
> instead:
>
> xen_commandline : dom0_mem=2048M,max:2048M loglvl=all
> guest_loglvl=all cpuid_mask_ecx=0x009ee3fd cpuid_mask_edx=0xbfebfbff
>
> Unfortunately still no luck. There's no errors in xm dmesg to indicate
> the settings were / weren't applied, it simply doesn't seem to do anything.
>
> - Nathan
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Mit freundlichen Grüßen / Regards
Sven Kieske
Systemadministrator
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