linux-kernel - system freezing with 3.0.4

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Date:	Thu, 08 Sep 2011 14:26:44 +0200
From:	Stefan Priebe - Profihost AG <s.priebe@...fihost.ag>
To:	LKML <linux-kernel@...r.kernel.org>
Subject: system freezing with 3.0.4

Hi list,

we've updated some systems from 2.6.32 to 3.0.4 (renamed to 2.6.40.4 for 
comp. reasons) kernel. Since then we're expecting freezes every now and 
then. All in memory apps are still working but nothing which reads or 
writes from or to disk (it seems to me like that).

If you're already conncted via ssh and running top suddenly idle is 
99-100% and loads goes up to 500.

Luckily i was able to trigger a sysrq on one machine fast enough:
echo t >/proc/sysrq-trigger

sysrq output is attached

I hope somebody can help.

Stefan

View attachment "sysrqtrigger.txt" of type "text/plain" (182568 bytes)