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[Bug 530035] [Virtualization/xen] v3.4.1 power management setup not stable @ boot
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Thu, 20 Aug 2009 05:14:44 -0600
  • Message-id: <20090820111444.71825245513@xxxxxxxxxxxxxxxxxxxxxx>
http://bugzilla.novell.com/show_bug.cgi?id=530035

User jbeulich@xxxxxxxxxx added comment
http://bugzilla.novell.com/show_bug.cgi?id=530035#c5





--- Comment #5 from Jan Beulich <jbeulich@xxxxxxxxxx> 2009-08-20 05:14:42 MDT
---
(In reply to comment #4)
PowerNow's _hardwired_ to a single governor ?! Then, you're a better sleuth
than I ... where on earth did you find that fact documented? I've clearly
missed it :-/

I'm reading the sources.

I'm not clear what effect, if any, the cpufreq=xen:ondemand(or performance) in
grub's having ... is it simply being ignored in the PowerNow case?

Correct.

Even if so, that still leaves items (1) & (2) as issues ... or, perhaps _all_
of this depends on AMD fixes?

Very likely, as xenpm assumes the general governor infrastructure was properly
initialized, which it is only partly (at best) for the powernow driver.

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