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RE: [Xen-devel] [PATCH][cpufreq] Xen support for the ondemand governor [1/2] (hypervisor code)


  • To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx
  • From: "Langsdorf, Mark" <mark.langsdorf@xxxxxxx>
  • Date: Wed, 24 Oct 2007 08:46:47 -0500
  • Delivery-date: Wed, 24 Oct 2007 06:47:51 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcgWDB15XAW5MIH/EdyyOQAWy6hiGQAOAaWQ
  • Thread-topic: [Xen-devel] [PATCH][cpufreq] Xen support for the ondemand governor [1/2] (hypervisor code)

> You can already work out total 'ticks' (actually nanoseconds 
> since boot) via data stored in shared_info. There's code in 
> arch/i386/kernel/time-xen.c to
> do so. Use that rather than modify this hypercall.

Excellent.  I wasn't aware of that, and wasn't wild
about having to modify the hypercall.

Since you were planning on modifying it to use the
cpumask, are you also going to add the shared_info
code?  If not, can you send me a pointer to the
changeset so I know what to work from for my 
modifications?

-Mark Langsdorf
Operating System Research Center
AMD



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