linux-kernel - Re: 2.6.30.1-4 kernels freezes dual pentium-3 system

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Date:	Mon, 10 Aug 2009 10:42:23 -0400
From:	"John Stoffel" <john@...ffel.org>
To:	devzero@....de
Cc:	Martin Rogge <marogge@...inehome.de>, linux-kernel@...r.kernel.org
Subject: Re: 2.6.30.1-4 kernels freezes dual pentium-3 system

>>>>> "devzero" == devzero  <devzero@....de> writes:

>> Box  works  works fine and very stable under 2.6.29.5 kernel, although
>> it is angry of buggy MP table (see app. #2 below). But sometimes, this
>> kernel  correctly  reboots  the  system  at all, but this happens very
>> rarely.  In  most cases, nobody detects the box was rebooted. And this
>> is satisfactory for me.

devzero> so, what is it - stable or not stable ?

In my case, it's been stable under 2.6.29 (though with a Raid crash
after 30+ days of uptime...).  Under anything newer, it hasn't been
stable, though I admit I haven't tried 2.6.29.x yet, though maybe
2.6.29.1 was ok.  Not sure. 

devzero> if sometimes "this kernel correctly reboots the system", do
devzero> you mean that happens spontaneously, i.e. without being
devzero> actively triggered ?

Kernel never reboots, the system locks up hard and *nothing* gets it
back beyond the reset button.  SysRq is total hosed, doesn't do
anything. 

devzero> i think it would be more interesting if there is anything in
devzero> dmesg on such lockup.  if not, maybe you can hook up a serial
devzero> console or netconsole and trigger sysrq when you have another
devzero> lockup.

There's notthing in dmesg, nothing on the screen (it's a server and
not usually connected to a screen) and my other main machine is the
NFS client of this box, so it's kinda painful to monitor.  

I need to try rigging up a completely standalone system to do both
netconsole and serial port console to see if I catch anything.  

John
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