linux-kernel - Re: 3.12: kernel panic when resuming from suspend to RAM (x86

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Message-ID: <alpine.DEB.2.02.1311222322480.30673@ionos.tec.linutronix.de>
Date:	Fri, 22 Nov 2013 23:27:50 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
cc:	Francis Moreau <francis.moro@...il.com>,
	Jingoo Han <jg1.han@...sung.com>,
	'Borislav Petkov' <bp@...en8.de>,
	'Wei WANG' <wei_wang@...lsil.com.cn>,
	'LKML' <linux-kernel@...r.kernel.org>,
	'Samuel Ortiz' <sameo@...ux.intel.com>,
	'Chris Ball' <cjb@...top.org>
Subject: Re: 3.12: kernel panic when resuming from suspend to RAM (x86_64)

On Fri, 22 Nov 2013, Rafael J. Wysocki wrote:
> On Friday, November 22, 2013 10:36:23 PM Francis Moreau wrote:
> > Ok, I've finally managed to find out the bad commit:
> > ad07277e82dedabacc52c82746633680a3187d25: ACPI / PM: Hold acpi_scan_lock
> > over system PM transitions
> > 
> > I verified that the parent commit doesn't have the problem.
> 
> Interesting.
> 
> > Rafael, you're the man now ;)
> 
> I kind of don't see how that commit may result in behavior that you
> described earlier in the thread.
> 
> You get a memory corruption that seems to have started to happen because
> we're holding an additional lock over suspend resume now.  Something's fishy
> on that machine and we need to figure out what it is.

The hickup happens in the timer softirq.

@Francis: Did you try to enable DEBUG_OBJECTS.*. If not please give it
	  a try.

Thanks,

	tglx


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