linux-kernel - Re: seeing some "Bad page state in process.." msgs....

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Date:	Sun, 16 Nov 2008 21:32:16 -0600
From:	Robert Hancock <hancockr@...w.ca>
To:	linux-kernel@...r.kernel.org
Subject:  Re: seeing some "Bad page state in process.." msgs....

Gautam Thaker wrote:
> I am running 2.6.26.6-rt11-1.2944.fc6.emulab-highmem #1 SMP PREEMPT RT
> 
> My test pgm is a java pgm that has about 650 threads in it (i am doing 
> some stress testing). This test runs w/o any kernel messages when run on 
> vanilla 2.6.25 kernel. But w/ the above RT kernel I see some kernel msgs 
> that I do not understand.
> 
> ANy hints?
> 
> root@...e0>  time java -classpath .:../../../utils/hist Test1 500 10001 
> 1 > out.500_senders_RT
> 
> Message from syslogd@...e0 at Mon Nov 10 18:54:14 2008 ...
> node0 kernel: Bad page state in process 'java'
> 
> Message from syslogd@...e0 at Mon Nov 10 18:54:14 2008 ...
> node0 kernel: page:c8a690b8 flags:0x80000000 mapping:c8a690c8 mapcount:0 
> count:0
> 
> Message from syslogd@...e0 at Mon Nov 10 18:54:14 2008 ...
> 
> Message from syslogd@...e0 at Mon Nov 10 18:54:14 2008 ...
> node0 kernel: Trying to fix it up, but a reboot is needednode0
>  kernel: Backtrace:
> 
> <MY ADDED NOTE: NO Backtrace is produced.>

You should be able to get this from dmesg, or from /var/log/messages if 
you rebooted already..

> 
> root@...e0> uname -a
> Linux node0.onepc2950rtnode.atlqos.emulab.atl.lmco.com 
> 2.6.26.6-rt11-1.2944.fc6.emulab-highmem #1 SMP PREEMPT RT Sat Nov 8 
> 20:10:03MST 2008 i686 i686 i386 GNU/Linux
> root@...e0>
> 

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