linux-kernel - Re: 2.6.23.1-rt5 (was 2.6.23-rt1 trouble)

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Message-ID: <472781E3.7010103@rncbc.org>
Date:	Tue, 30 Oct 2007 19:11:31 +0000
From:	Rui Nuno Capela <rncbc@...bc.org>
To:	Steven Rostedt <rostedt@...dmis.org>
CC:	linux-rt-users@...r.kernel.org, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Gregory Haskins <ghaskins@...ell.com>
Subject: Re: 2.6.23.1-rt5 (was 2.6.23-rt1 trouble)

Rui Nuno Capela wrote:
> Steven Rostedt wrote:
>>
>> When things start to freeze, could you capture the output of a sysrq-t.
>>
> 
> yes, you can find a complete serial console capture here, where it holds
> the final SysRq-T output:
>   http://www.rncbc.org/datahub/console-2.6.23.1-rt4.1-1.log
> 
> the corresponding .config is also there:
>   http://www.rncbc.org/datahub/config-2.6.23.1-rt4.1
> 
> the reason this is a new kernel build, following a shot in the dark from
> nick mainsbridge, which let out the ntfs module build (CONFIG_NTFS_FS is
> not set) suggesting that would mitigate similar freezes.
> 
> in deed the general feel is that it seems to run longer and less prone
> to those incidents, but that is just a gut feeling, nothing more.
> 
> hope this be any useful.
> 
>> I have a P4HT laptop (unfortunately with no serial). I use it as one of my
>> main machines, so it will suck for me when it freezes ;-). I'll take your
>> config and try it out.
>>
>> I'll most likely do this on Monday since process Wife has the highest
>> priority over the weekend ;-)
>>
> 
> that is also true here :)
> 
> otoh, as reported before, the freezes are not exclusive to P4HT, which
> is the main box I'm been reporting here (the one which has a good old
> serial port anyway), but also applies to my other laptop, an core2 duo
> t7200.
> 

still in trouble with 2.6.23.1-rt5 :(

.config:
  http://www.rncbc.org/datahub/config-2.6.23.1-rt5.0

serial console capture:
  http://www.rncbc.org/datahub/console-2.6.23.1-rt5.0-1.log

one thing about SysRq-T: while in the middle of a freeze it just doesn't
dump anything, just the 'SysRq : Show State' line. you can see that
several times on the console output above.

only when it is somewhat recovering, as said, by making some last resort
measures like SysRq-E as in 'SysRq: terminate All Tasks' for instance,
then SysRq-T will dump something. my guess is that this later dump will
be moot :/

back to production with 2.6.22.1-rt9 ;)
-- 
rncbc aka Rui Nuno Capela
rncbc@...bc.org
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