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From: Yigal Goldberger <yigal_gold@domain.hid>
To: xenomai@xenomai.org
Subject: [Xenomai-help] kernel BUG in preempt_schedule_irq at kernel/sched.c:3114!
Date: Thu, 12 Mar 2009 14:17:13 -0700 (PDT)	[thread overview]
Message-ID: <881791.69224.qm@domain.hid> (raw)


Hi, 
I've also submitted this on the website under Xenomai-support, but I'm not sure which is the best way to go... so I'll try this channel as well.

My system is a PPC running kernel 2.6.14.7 patched with Xenomai. 
My system communicates with the host PC through two RS-232 ports and each port has also a uart connection to a slave device. 
The slave device sends interrupts to the CPU on the board , and are handled by a lodable kernel module interrupt handler . 
When the system works only through a singel port - (RS-232 between the PC and the board,and uart between the board and a slave device) it works fine, but when the 2 ports are stressed together I get the Oops below.I've tried working with the uart without interrupts and the Oops still occures . 


I've looked it up in the System.map file and the addresses correspond to the following : 
c0004c7c - __ipipe_ret_from_except 
c0004a40 - somewhere inside resume_kernel. 


" kernel BUG in preempt_schedule_irq at kernel/sched.c:3114! 
Oops: Exception in kernel mode, sig: 5 [#1] 
PREEMPT 
NIP: C02297A8 LR: C0004A40 SP: C0286170 REGS: c02860c0 TRAP: 0700 Tainted: P 
MSR: 00029032 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11 
TASK = c0265b00[0] 'swapper' THREAD: c0286000 
Last syscall: 120 
GPR00: 00000001 C0286170 C0265B00 00009032 00000000 00003032 00600084 C02B5594 
GPR08: C0280000 C0286000 00000001 C026A200 512037AD 4377FFBF 0FFFD000 00000000 
GPR16: 00000001 00000001 FFFFFFFF 007FFF00 0FFF7E68 00000000 00000002 0FBC62B0 
GPR24: 00000000 00000000 40000000 007FFF7D 007FFF00 C02A0000 C0265B00 C02A28F0 
Call trace: [c0004a40] [c0004c7c] [c0004c7c] [c0004c7c] [c0004c7c] [c0004c7c] [c0004c7c] [c0004c7c] [c0004c7c] [c0004c7c] [c0004c7c] [c0004c7c] [c0004c7c] [c0004c7c] [c0004c7c] 
Kernel panic - not syncing: Attempted to kill the idle task! 
<0>Rebooting in 1 seconds..þ " 


Does anyone have an idea why this is happening and what am I doing wrong ? 


Thanks, 
Yigal. 







             reply	other threads:[~2009-03-12 21:17 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-03-12 21:17 Yigal Goldberger [this message]
2009-03-12 22:09 ` [Xenomai-help] kernel BUG in preempt_schedule_irq at kernel/sched.c:3114! Philippe Gerum

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