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Message-ID: <20070524125453.GA7554@elte.hu>
Date: Thu, 24 May 2007 14:54:53 +0200
From: Ingo Molnar <mingo@...e.hu>
To: Miklos Szeredi <miklos@...redi.hu>
Cc: linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [BUG] long freezes on thinkpad t60
* Miklos Szeredi <miklos@...redi.hu> wrote:
> On some strange workload involving strace and fuse I get ocasional
> long periods (10-100s) of total unresponsiveness, not even SysRq-*
> working. Then the machine continues as normal. Nothing in dmesg,
> absolutely no indication about what is happening.
> Any ideas? Possibly something ACPI related?
how reproducable are these lockups - could you possibly trace it? If yes
then please apply:
http://www.tglx.de/private/tglx/ht-debug/tracer.diff
and run the attached trace-it-1sec.c thing in a loop:
echo 1 > /proc/sys/kernel/mcount_enabled
while true; do
./trace-it-1sec > trace-`date`.txt
done
and wait for the lockup. Once it happens, please upload the trace*.txt
file that contains the lockup, i guess we'll be able to tell you more
about the nature of the lockup. (Perhaps increase the sleep(1) to
sleep(5) to capture longer periods and to increase the odds that you
catch the lockup while the utility is tracing.)
Ingo
View attachment "trace-it-1sec.c" of type "text/plain" (2307 bytes)
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