RE: [Xen-devel] CONFIG_CPU_FREQ

["Petersson, Mats" <Mats.Petersson@xxxxxxx>]

> -----Original Message-----
> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Jan Beulich
> Sent: 15 February 2006 14:06
> To: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-devel] CONFIG_CPU_FREQ
> 
> I see that linux-defconfig-xen{,0}_x86_32 have 
> CONFIG_CPU_FREQ disabled, presumably since these are not 
> expected to work (and in fact some of the resulting modules 
> don't have all the symbols they depend upon available). Can 
> someone confirm this? We have this and the dependent options 
> still enabled in our SLES10 kernels, and I'd like to know 
> whether I should try to fix the missing symbols problem, or 
> whether instead CPU_FREQ should be made dependent upon 
> !X86_XEN (similar to how x86-64 does).
> 
> Thanks, Jan
> 
CPU frequency changing doesn't work under Xen at the moment, and it's
pretty pointless for individual kernels to do this without understanding
what else is going on in the OTHER kernels that may be running on the
system - so it makes sense to disable it by "permanent" measure, until
someone gets round to figuring out how to make Xen itself handle CPU
frequency changing (perhaps with help from Dom0)... 

--
Mats


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