Re: resume from S3 sleep not working in Dom0 - Xen4.2.1

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

On Sat, Feb 09, 2013 at 06:21:34PM +0100, Milan opath wrote:
> I apologize for the patching confusion. I applied Konrad's acpi-s3 patch to
> linux 3.7.5-1 and Ben's Xen patches to Xen 4.2.1-3 stable. I've also put
> dom0_vcpus_pin to xen kernel line in bootloader but still I cannot modprobe
> acpi_cpufreq and S3 sleep resume still not working.

The module is xen-acpi-processor and you should see whether it works by
running 'xenpm get-cpufreq-para'. If you get values then it worked.

> 
> How can I debug it?
> Thanks.
> 
> 
> 2013/2/8 Konrad Rzeszutek Wilk <konrad@kernel.org>
> 
> > On Fri, Feb 8, 2013 at 5:11 AM, Tomasz Wroblewski
> > <tomasz.wroblewski@citrix.com> wrote:
> > >
> > >> Hm, that is suspect. There should not be any cpuidle_register? Perhaps
> > >> you are .. ah yes, you are hitting a bug that should be in the stable
> > >> tree fix.
> > >>
> > >> Here is the git commit b88a634a903d9670aa5f2f785aa890628ce0dece and
> > >> 6f8c2e7933679f54b6478945dc72e59ef9a3d5e0
> > >>
> > >>
> > >
> > > Thanks Konrad. I've tried your patches, and whilst I have not seen this
> > > crash in cpuidle_register anymore, the others are still present (in
> > > build_schedule_domains for example).
> > >
> >
> > That looks familiar too. I think it got fixed in the upstream kernel
> > and it was a generic bug - but I can't recall which commit it was.
> >
> > > I've stumbled on a bit of interesting info - using dom0_vcpus_pin on xen
> > > commandline stops both the xen scheduler and dom0 kernel crashing and all
> > > works fine - made dozens of succesfull s3 attempts. Was wondering if you
> > > guys had any thoughts on this? Is the dom0 kernel even supposed to cope
> > > during s3 in non dom0 vcpu pin case?
> > >
> > No that is something new. Is this only an issue on Intel boxes but not AMD?
> >