RE: [Xen-devel] [PATCH] pm : provide CC7/PC2 residency

["Zhang, Yang Z" <yang.z.zhang@xxxxxxxxx>]

> From: Jan Beulich [mailto:JBeulich@xxxxxxxx]
> >>> On 25.10.11 at 15:34, "Zhang, Yang Z" <yang.z.zhang@xxxxxxxxx> wrote:
> > --- a/xen/include/public/sysctl.h       Mon Oct 24 18:01:07 2011 +0100
> > +++ b/xen/include/public/sysctl.h       Fri Oct 28 21:33:07 2011 +0800
> > @@ -225,11 +225,13 @@
> >      uint64_aligned_t idle_time;                 /* idle time from boot */
> >      XEN_GUEST_HANDLE_64(uint64) triggers;    /* Cx trigger counts */
> >      XEN_GUEST_HANDLE_64(uint64) residencies; /* Cx residencies */
> > +    uint64_aligned_t pc2;
> >      uint64_aligned_t pc3;
> >      uint64_aligned_t pc6;
> >      uint64_aligned_t pc7;
> >      uint64_aligned_t cc3;
> >      uint64_aligned_t cc6;
> > +    uint64_aligned_t cc7;
> >  };
> >
> >  struct xen_sysctl_get_pmstat {
> 
> Structure layout changes like this should be accompanied by a bump of
> XEN_SYSCTL_INTERFACE_VERSION - is there any reason not to do so in this case?
Can you explain what's the problem? Are you mean new xen with old tools will 
have problem or anything else?

best regards
yang

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