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SubjectRe: 2.6.24-rc6-git12: Reported regressions from 2.6.23

* Rafael J. Wysocki <rjw@sisk.pl> wrote:

> Subject : soft lockup - CPU#1 stuck for 15s! [swapper:0]
> Submitter : "Parag Warudkar" <parag.warudkar@gmail.com>
> Date : 2007-12-07 18:14
> References : http://lkml.org/lkml/2007/12/7/299
> http://bugzilla.kernel.org/show_bug.cgi?id=9525
> Handled-By : "Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com>
> Thomas Gleixner <tglx@linutronix.de>
> Ingo Molnar <mingo@elte.hu>

i think this only occurs with cpuidle, right? drivers/cpuidle/ and
CPU_IDLE is new in 2.6.24 so this appears to be a bug in that code (or a
bug elsewhere triggered by that code), not a regression from v2.6.23.

this commit might also have improved things:

------------>
commit 2bacec8c318ca0418c0ee9ac662ee44207765dd4
Author: Ingo Molnar <mingo@elte.hu>
Date: Tue Dec 18 15:21:13 2007 +0100

sched: touch softlockup watchdog after idling

touch softlockup watchdog after idling.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
<------------

albeit Parag reported actual real, human-noticeable delays in system
behavior and those cannot be false positives.

Ingo


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