linux-kernel - Re: [Regression] 2.6.24-git3: Major annoyance during suspend/hibernation on x86-64 (bisected)

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Message-ID: <479D3287.1050604@redhat.com>
Date:	Sun, 27 Jan 2008 20:40:23 -0500
From:	Steven Rostedt <srostedt@...hat.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Dmitry Adamushko <dmitry.adamushko@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [Regression] 2.6.24-git3: Major annoyance during suspend/hibernation
 on x86-64 (bisected)

Rafael J. Wysocki wrote:

> No, this isn't the WARN_ON().
> 
>> this does have the feel of being scheduling related, but are you 
>> absolutely sure about the precise identity of the patch?
> 
> Actually, not quite.  That's why I have verified it and found that another
> patch is really responsible for the issue, namely:
> 
> commit 82a1fcb90287052aabfa235e7ffc693ea003fe69
> Author: Ingo Molnar <mingo@...e.hu>
> Date:   Fri Jan 25 21:08:02 2008 +0100
> 
>     softlockup: automatically detect hung TASK_UNINTERRUPTIBLE tasks

Are you getting a bunch of prints from the softlockup detector in dmesg?
I wonder if the detector can detect a long timeout caused by suspend and 
resume and if not is triggering false positives?

-- Steve

> 
> Reverting this commit (it reverts with some minor modifications) fixes the
> problem for me.
> 
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