Re: [Xen-devel] Xen4.2 S3 regression?

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Mon, Sep 24, 2012 at 07:54:05AM -0400, Ben Guthro wrote:
> I see - Konrad - do you have a changeset I can look for with the features
> Jan describes?

konrad@phenom:~/work/linux$ git log --oneline drivers/xen/xen-acpi-processor.c
17f9b89 xen/acpi: Fix potential memory leak.
323f90a xen-acpi-processor: Add missing #include <xen/xen.h>
b930fe5 xen/acpi: Workaround broken BIOSes exporting non-existing C-states.
27257fc xen/acpi: Remove the WARN's as they just create noise.
59a5680 xen/acpi-processor: C and P-state driver that uploads said data to 
hypervisor.


> 
> 
> On Mon, Sep 24, 2012 at 7:45 AM, Jan Beulich <JBeulich@xxxxxxxx> wrote:
> 
> > >>> On 24.09.12 at 13:25, Ben Guthro <ben@xxxxxxxxxx> wrote:
> > > It is an older system (Core2) - so it may be using the default mechanism,
> > > but I'd have to go dig up some processor docs to be sure.
> >
> > This is not just a matter of what the CPU supports, but also what
> > info gets passed down from Dom0 - if e.g. your kernel doesn't
> > have Konrad's P-/C-state patches, then there's no way for Xen to
> > use any of the advanced methods.
> >
> > Jan
> >
> >

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