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Re: [Xen-devel] [osstest test] 64958: regressions - trouble: broken/fail/pass

On 11/25/2015 08:32 AM, Ian Campbell wrote:
> On Wed, 2015-11-25 at 14:37 +0000, Ian Campbell wrote:
>> 2015-11-21 23:06:44 Z executing ssh ... root@xxxxxxxxxxxxx virsh 
>> domxml-from-native xen-xl /etc/xen/debian.jessie.guest.osstest.cfg > 
>> /etc/xen/debian.jessie.guest.osstest.cfg.xml 
>> error: An error occurred, but the cause is unknown
> This turned out to be the check of vcpus vs MAX_VIRT_CPUS in
> xenParseCPUFeatures. 
> MAX_VIRT_CPUS is defined (by libvirt) as XEN_LEGACY_MAX_VCPUS, which is
> mostly wrong on x86 (which supports more than that for guests using vcpu
> placement) but is very wrong on ARM where we insist on vcpu placement and
> XEN_LEGACY_MAX_VCPUS is therefore 1.
> This test was trying to create a 2 cpu guest.
> Since this check is in xen_common.c I think it might take a little
> unravelling to fix this, since it seems to have lead to various other
> assumptions to do with CPU masks fitting into an unsigned long in the
> libvirt code base.

Hi Ian,

Sorry for the delay. I'm still catching up on mail after some days away.

> /me rolls up sleeves.

I see that your toiling has produced some patches. I'm slowly making it through
patch reviews too, and will get to those soon.


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