El 21/10/15 a les 11.51, Eggert, Lars ha escrit:
> On 2015-10-21, at 11:11, Roger Pau Monné <roger....@citrix.com> wrote:
>> Are you loading hwpmc by default?
> 
> Yes.
> 
>> Performance monitor counters are not
>> yet implemented in the FreeBSD PVH port, so you should not load hwpmc. I
>> have to look at providing an error message here rather than panicking.
> 
> Strange, the same kernel config worked earlier. But without hwmpc, the it now 
> boots.

It might well be that Xen is exposing different cpuid flags in 4.6 vs
4.5, and that makes hwpmc attach. All the cpuid stuff in PVH is still
in-flux.

Roger.

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