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

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Message-ID: <4751F1AB.2060801@rtr.ca>
Date:	Sat, 01 Dec 2007 18:43:39 -0500
From:	Mark Lord <lkml@....ca>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	"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: 20000+ wake-ups/second in 2.6.24.   Bug?

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.

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.
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