[CentOS] centos 5.4 :: linux-2.6.32.2 compile error (via nano L2200 at 1600)

Ned Slider ned at unixmail.co.uk
Thu Jan 7 11:36:58 UTC 2010


On 01/07/2010 10:12 AM, Adrian Sevcenco wrote:
> Jim Perrin wrote:
>> On Wed, Jan 6, 2010 at 5:15 PM, Adrian Sevcenco<Adrian.Sevcenco at cern.ch>  wrote:
>>> Hi! I try to compile an vanilla kernel 2.6.32.2 on centos 5.4 and i have
>>> this error :
>>
>> Out of curiosity, why are you rebuilding the kernel? Is there a driver
>> you need which isn't supplied by the elrepo repository folks?
> Well, the thing is that i lack power scaling (i understood that the
> module should have name something like overhaul .. or something)
> Given that this is an samba home server with very little load is a pity
> that it stays all the time at maximum freq.. elrepo guys are fantastic
> and from them i have the vt1211 driver for the sensors .. but i dint see
> that they would have also scaling drivers in their repo.
> Thanks,
> Adrian
>

Depends what hardware you have. ELRepo has a fixed powernow-k8 driver 
for AMD processors that allows correct scaling on multicore processors. 
See here:

http://blog.toracat.org/2009/08/go-green-with-newer-amd-processors/
http://elrepo.org/tiki/kmod-powernow-k8

Other than that, generally I've found most scaling issues to be 
hardware/bios related, rather than an issue within CentOS itself so I'd 
suggest checking you have the latest bios for your motherboard and that 
all power saving options within the bios are correctly set.

Hope that helps.



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