Re: [xen-4.12-testing test] 169199: regressions - FAIL

[Julien Grall <julien@xxxxxxx>]

Hi,

On 08/04/2022 12:01, Roger Pau Monné wrote:
> > > I could add a suitable dom0_max_vcpus parameter to osstest.  XenServer
> > > uses 16 for example.
> > I'm afraid a fixed number won't do, the more that iirc there are
> > systems with just a few cores in the pool (and you don't want to
> > over-commit by default).
> But this won't over commit, it would just assign dom0 16 vCPUs at
> most, if the system has less than 16 vCPUs that's what would be
> assigned to dom0.
AFAICT, this is not the case on Arm. If you ask 16 vCPUs, then you will 
get that number even if there are 8 pCPUs.
In fact, the documentation of dom0_max_vcpus suggests that the numbers 
of vCPUs can be more than the number of pCPUs.
Cheers,

--
Julien Grall