Re: cpupower reports uninitialized values for offline cpus

[Prarit Bhargava <prarit@redhat.com>]

On 10/01/2015 08:29 AM, Thomas Renninger wrote:
> On Wednesday, September 30, 2015 02:25:47 PM Prarit Bhargava wrote:
>> On 09/30/2015 12:23 PM, Thomas Renninger wrote:
> ...
>> Yeah, we'd have to add an additional state to the CPU hotplug callback state
>> machine (CPU_ADD_PHYSICAL?) to identify when a cpu was hot-added.  I
>> suppose it could be done but it seems like an awful lot of churn for little
>> gain.
> 
> It shouldn't be that hard.
> If I find some time I give it a try.
> This is a rather central piece of kernel code and affects
> more or less all architectures, so getting this finally mainline
> may take a while...
> 
> So it would be nice if somewhen in the future we have 2 independent
> fixes:
> 
> The cpupower one as you wrote before, ignoring cores without
> topology sysfs info (but not simply checking for "is core offline"),
> better check whether the directory or a specific file exists.
> 
> And a kernel one which still shows topology info of soft offlined
> cores which with above cpupower solution will result in previous
> output (offlined cores listed, but with valid topology info).
> 
> Makes sense?

Yup, makes sense.  Jacob (Jake) is going to handle the cpupower stuff right
away.  I'll dive into the topology stuff in a little bit and/or assist Jake with it.

Thanks Thomas :)

P.

> 
>       Thomas
>