linux-kernel - Re: 20000+ wake-ups/second in 2.6.24. Bug?

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Message-ID: <20071202144113.GJ15974@stusta.de>
Date:	Sun, 2 Dec 2007 15:41:13 +0100
From:	Adrian Bunk <bunk@...nel.org>
To:	Mark Lord <lkml@....ca>
Cc:	Arjan van de Ven <arjan@...radead.org>,
	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>, abelay@...ell.com,
	lenb@...nel.org, rjw@...k.pl, linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org
Subject: Re: 20000+ wake-ups/second in 2.6.24.   Bug?

On Sat, Dec 01, 2007 at 06:43:39PM -0500, Mark Lord wrote:
> Mark Lord wrote:
>> Arjan van de Ven wrote:
>>> On Fri, 30 Nov 2007 22:31:17 -0500
>>> Mark Lord <lkml@....ca> wrote:
> ...
>>>> Speaking of which.. what's with powertop on 2.6.24 ???
>>>> It's gone from 100-200 wakeups/sec to 20000 wakeups/sec !!!!!!!
>>>
>>> ho hum.. Lenovo T61?
>>> I have some reports that that happens once in a while (but it's not
>>> limited to .24 and it's also real, it's not a powertop bug but it
>>> actually is waking up that much)..
>> ..
>>
>> No, it's my hefty Dell Inspiron 9400.
>>
>> And I just figured out the powertop:  it needed the kernel timers
>> patch from the powertop site that was originally for 2.6.21..
> ...
>
> Dagnabbit.. it's done it again.. went from 100-200 wakeups/sec
> back up to 20000+ wakeups/sec.  This time *with* the powertop patches in place.

What is the status with an unpatched 2.6.23?

> Somethings broken in there, but I don't know what.
> Or how to make it happen on demand.. it's fine after rebooting again.
>
> ???
>
> At least now I know to look when I hear the fan turning on
> when the system is otherwise supposed to be idle..
>
> 2.6.23 did not have this problem.

Please send the output of "dmesg -s 1000000" for both 2.6.23 and 2.6.24.

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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