From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Nikita V. Youshchenko" <yoush@cs.msu.su>
Subject: Re: help needed, 2.6.31.6-rt19 hang with network user app
Date: Sat, 21 Nov 2009 11:25:37 +0300
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Cc: rt-users <linux-rt-users@vger.kernel.org>
To: "Leyendecker, Robert" <Robert.Leyendecker@lsi.com>
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> > Does host A have a serial port? If yes, connect that to another host
> > using a null-modem cable, boot host A with serial console (boot arg
> > console=ttyS0,15200), and use that to extract kernel crash message.
> > Then post that to this list.
>
> unfortunately - nothing shows up in the serial log after the normal boot
> spew. I do see some sort of cr/lf every second for a while.

Of course that should be console=ttyS0,115200
And on other side serial communication software should be configured
to use 115200 8n1 with no flow control.

> Nov 20 21:12:00 localhost kernel: BUG: using smp_processor_id() in preemptible [00000000] code: smash/6801
> Nov 20 21:12:00 localhost kernel: caller is  __schedule+0xe/0x7d4 Nov 20 21:12:00 localhost kernel: Pid: 6801, comm: smash Not tainted 2.6.31.6-rt19 #1
> Nov 20 21:12:00 localhost kernel: Call Trace:
> Nov 20 21:12:00 localhost kernel: [<c06dc3df>] ? printk+0xf/0x18
> Nov 20 21:12:00 localhost kernel: [<c05499a6>] debug_smp_processor_id+0xa6/0xbc
> Nov 20 21:12:00 localhost kernel: [<c06dc689>] __schedule+0xe/0x7d4
> Nov 20 21:12:00 localhost kernel: [<c046621f>] ? audit_syscall_exit+0xfa/0x10f
> Nov 20 21:12:00 localhost kernel: [<c040a955>] ? syscall_trace_leave+0xc8/0xef
> Nov 20 21:12:00 localhost kernel: [<c040338a>] work_resched+0x5/0x19

Hopely somebody on list will be able to comment on this.