#1 Testing different builds on bare metal x86 with questing
### ### ###
Other than in my lxd container based automated tests, host-model here
translates to:
1:10.0.2+ds-1ubuntu2 (this is what is in the current Ubuntu, until I
started on 10.1)
=> On start maps host-model to:
<model fallback='forbid'>Cascadelake-Server</model>
<vendor>Intel</vendor>
<feature policy='require' name='vmx'/>
<feature policy='require' name='pdcm'/>
...
=> Can do managedsave + start without problems
### ### ###
1:10.1.0~rc2+ds-1ubuntu1 (which has 00268e0 "i386/cpu: Warn about why
CPUID_EXT_PDCM is not available" reverted)
=> On start maps host-model to:
<model fallback='forbid'>Cascadelake-Server</model>
<vendor>Intel</vendor>
<feature policy='require' name='vmx'/>
<feature policy='disable' name='pdcm'/>
^^ this is already different
...
=> Can do managedsave + start without problems
### ### ###
1:10.1.0~rc3+ds-2ubuntu1~questingppa1 (which is WITHOUT the revert, more
like the normal RC3)
=> On start maps host-model to:
<model fallback='forbid'>Cascadelake-Server</model>
<vendor>Intel</vendor>
<feature policy='require' name='vmx'/>
<feature policy='disable' name='pdcm'/>
^^ like with the revert, but other than 10.0 did
...
=> Fails to do save and restore just as I had it in my container based tests
$ virsh start testguest
error: Failed to start domain 'testguest'
error: operation failed: guest CPU doesn't match specification: missing
features: pdcm
So while I was concerned if my test environment might have been part of this,
it seems it is generally applicable and a problem.
This is on 6.16.0-13-generic on a Intel Xeon Gold 5222
With that I'd strongly suggest to revert it for now, but let me look
into the cross version migration as well, as this was odd too.
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https://bugs.launchpad.net/bugs/2120649
Title:
PDCM breakage in qemu 10.1
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