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Message-ID: <alpine.LFD.1.00.0803110803280.3781@apollo.tec.linutronix.de>
Date: Tue, 11 Mar 2008 09:11:32 +0100 (CET)
From: Thomas Gleixner <tglx@...utronix.de>
To: "Renato S. Yamane" <renatoyamane@...dic.com.br>
cc: linux-kernel@...r.kernel.org, alan-jenkins@...fmail.co.uk,
devzero@....de, mingo@...e.hu
Subject: Re: Kernel Linux 2.6.23.16 hangs when run updatedb
On Mon, 10 Mar 2008, Renato S. Yamane wrote:
> > > How can I fix this? Is safe run reiserfsck?
> >
> >
> > I think he's wrong.
> >
> > Looking at the call trace, the BUG happens during an interrupt. It
> > could be a coincidence that the interrupt happened during this
> > particular system call.
> >
> > It looks like a timer callback has been corrupted / set to an invalid
> > value. The BUG is due to accessing the invalid address 61060fe0
> > within enqueue_hrtimer, and the EIP (instruction pointer) is also
> > equal to 61060fe0. This would be consistent with the source code of
> > enqueue_hrtimer. It's not an obvious reiserfs issue.
It's pretty inconsistent with the source code of enqueue_hrtimer().
The only possibility to have a callback from enqueue_hrtimer() is in
hrtimer_enqueue_reprogram() in the HRTIMER_CB_IRQSAFE_NO_RESTART
case. Such timers can not be requeued in interrupt context, hence the
name HRTIMER_CB_IRQSAFE_NO_RESTART :)
Also in hrtimer_interrupt context, hrtimer_enqueue() is called with
reprogram = 0, which ensures that we do not call
hrtimer_enqueue_reprogram().
> > I don't know how to find out where this corruption is happening, but
> > it's worth asking the hrtimers people.
Let's gather some more information.
Renato, some questions:
1) is this fully reproducible with updatedb ?
2) are you sure that this is the first stacktrace you captured, there
might be some BUG before that which scrolled out of sight. Any chance
to use a serial console ?
3) Can you please recompile the kernel with CONFIF_DEBUG_INFO set
and then run the following addresses from the backtrace through
addr2line with the new vmlinux:
# addr2line -e vmlinux 0xc013dad9 0xc0107c3b
Please provide the output.
4) Looking at your .config it seems you have some more patches applied
aside of the .16 stable. Can you please upload a full patch queue
somewhere ?
Thanks,
tglx
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