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Message-Id: <1195502804.19479.6.camel@johannes.berg>
Date: Mon, 19 Nov 2007 21:06:44 +0100
From: Johannes Berg <johannes@...solutions.net>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>,
Linux Kernel list <linux-kernel@...r.kernel.org>,
linuxppc-dev list <linuxppc-dev@...abs.org>,
Paul Mackerras <paulus@...ba.org>
Subject: NULL dereference in clockevents_program_event
Hi,
During a hibernate cycle on my G5, while machine was powering down after
saving the image, I just had a NULL dereference in
clockevents_program_event when accessing dev->mode, dev was NULL.
Unfortunately the machine rebooted before I was able to write down more
than the fact that it was called from tick_program_event(); the problem
doesn't seem to be easily reproducible.
From what I can see when doing the same thing, the shutdown attempts to
offline all CPUs. Because the snapshot was actually saved to disk and
the machine was shutting down I guess that the it happened at that time,
but I have no idea what else to do to debug this.
I have
| CONFIG_HIGH_RES_TIMERS=y
| CONFIG_NO_HZ=y
in this config.
johannes
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