linux-kernel - Re: intel_ips produces constant load of 1

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Date:	Wed, 23 Mar 2011 20:44:02 +0100
From:	Andreas Hartmann <andihartmann@...enet.de>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
CC:	linux-kernel@...r.kernel.org
Subject: Re: intel_ips produces constant load of 1

Jesse Barnes wrote:
> On Wed, 23 Mar 2011 19:15:57 +0100
> Andreas Hartmann <andihartmann@...enet.de> wrote:
> 
>> Jesse Barnes wrote:
>>> On Mon, 21 Mar 2011 11:04:04 -0700
>>> Jesse Barnes <jbarnes@...tuousgeek.org> wrote:
>>>
>>>>> ps aux | grep ips
>>>>> root       593  0.0  0.0      0     0 ?        S    17:20   0:00
>>>>> [ips-adjust]
>>>>> root       594  0.0  0.0      0     0 ?        D    17:20   0:00
>>>>> [ips-monitor]
>>>>>
>>>>> If the module isn't loaded, the load of the machine in idle mode is 0 as
>>>>> expected.  
>>>>
>>>> This is a reporting problem, and probably due to the schedule() call
>>>> and associated task state in the ips-monitor thread.  I thought setting
>>>> the task state to interruptible would prevent this, but it seems like
>>>> it's not enough for the deferrable on-stack timers?
>>>>
>>>> At any rate, it's not actually causing increased CPU usage, so you can
>>>> safely ignore it until we have a fix.
>>>
>>> Oops, one task uses interruptible correctly, but the monitor thread
>>> doesn't.
>>>
>>> Does this patch fix your load average?
>>
>> Which patch? I can't see any patch :-).
>>
> 
> Did I forget to paste it?  See below.
> 

Uuuups - it was below the sig, which I switch off :-). Found it. Will
test it tomorrow.


Andreas
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