Re: [Xen-devel] [PATCH] Disable Xen PowerNow! support on Opteron 2nd gen and earlier processors

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 23/1/08 15:31, "Langsdorf, Mark" <mark.langsdorf@xxxxxxx> wrote:

>> Seeing them at that frequency (less than one a minute) is not
>> too serious.
>> Perhaps we should get rid of the message, or reduce its priority.
> 
> Red Hat engineering is requesting the disable because they've
> gotten STREAM results with the test finishing before it started.
> 
> For myself, I don't mind the frequency of the messages.  In the
> real world, it's serious, especially on financial servers.

Firstly, Red Hat can apply this patch to their own tree, regardless of
whether or not it's in 2.6.18-xen.hg. Secondly, the cpufreq stuff only kicks
in if you put cpufreq=dom0-kernel on the Xen command line. Perhaps they
shouldn't do that? They could even omit it dynamically at install time,
based on install-hardware configuration.

 -- Keir



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