From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Thu, 05 Mar 2009 10:55:35 +0100
From: Philippe Gerum <rpm@xenomai.org>
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Subject: Re: [Xenomai-help] ipipe error
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To: Mark Saiia <mark.saiia@domain.hid>
Cc: xenomai@xenomai.org

Mark Saiia wrote:
> When running 2.6.27.19 w/ Xenomai 2.4.7 on a geode board, I get the
> following in the log. I haven't done any debugging yet, but wanted to
> see if anyone else has this issue.  It results in some of the
> application threads not being responsive, while others are still
> running.
> 

Is CONFIG_FRAME_POINTER enabled for your kernel, i.e. can we trust the backtrace
below?

Additionally, what happens if you stop asking rt_task_set_mode() to clear
primary mode via toggling the T_PRIMARY flag? (which you should very likely NOT
do, btw. Forcing the current mode is counter-productive most of the time; this
is an internal feature for very, very specific needs of some Xenomai library code).

> 	ar  5 15:08:22 (none) user.err kernel: I-pipe: Detected illicit call
> from domain 'Xenomai'
> Mar  5 15:08:22 (none) user.err kernel:         into a service
> reserved for domain 'Linux' and below.
> Mar  5 15:08:22 (none) user.warn kernel: Pid: 990, comm: main thread
> Not tainted 2.6.27.19-standard-xenomai #1
> Mar  5 15:08:22 (none) user.warn kernel:  [<c0146d3d>]
> ipipe_check_context+0x8d/0xb0
> Mar  5 15:08:22 (none) user.warn kernel:  [<c0115535>]
> sub_preempt_count+0x15/0x80
> Mar  5 15:08:22 (none) user.warn kernel:  [<c0115e1e>]
> finish_task_switch+0x2e/0x80
> Mar  5 15:08:22 (none) user.warn kernel:  [<c01172ba>]
> ipipe_reenter_root+0x1a/0x60
> Mar  5 15:08:22 (none) user.warn kernel:  [<c0155a2d>] xnshadow_relax+0x9d/0x100
> Mar  5 15:08:22 (none) user.warn kernel:  [<c015e9b7>]
> __rt_task_set_mode+0x67/0x90
> Mar  5 15:08:22 (none) user.warn kernel:  [<c0155dd7>]
> losyscall_event+0xb7/0x170
> Mar  5 15:08:22 (none) user.warn kernel:  [<c0155d20>] ?
> losyscall_event+0x0/0x170
> Mar  5 15:08:22 (none) user.warn kernel:  [<c0148150>]
> __ipipe_dispatch_event+0xd0/0x220
> Mar  5 15:08:22 (none) user.warn kernel:  [<c010d54a>]
> __ipipe_syscall_root+0x3a/0xe0
> Mar  5 15:08:22 (none) user.warn kernel:  [<c010320b>] system_call+0x2b/0x4c
> Mar  5 15:08:22 (none) user.warn kernel:  =======================
> Mar  5 15:08:22 (none) user.warn kernel: ------------[ cut here ]------------
> Mar  5 15:08:22 (none) user.warn kernel: WARNING: at
> kernel/sched.c:4322 sub_preempt_count+0x7d/0x80()
> Mar  5 15:08:22 (none) user.warn kernel: Modules linked in: ipv6
> eepro100 mii genrtc usb_storage nls_iso8859_1 nls_cp437
> Mar  5 15:08:22 (none) user.warn kernel: Pid: 990, comm: main thread
> Not tainted 2.6.27.19-standard-xenomai #1
> Mar  5 15:08:22 (none) user.warn kernel:  [<c011b746>]
> warn_on_slowpath+0x46/0x60
> Mar  5 15:08:22 (none) user.warn kernel:  [<c010320b>] ? system_call+0x2b/0x4c
> Mar  5 15:08:22 (none) user.warn kernel:  [<c011cc71>] ? printk+0x41/0x180
> Mar  5 15:08:22 (none) user.warn kernel:  [<c0103c85>] ?
> show_trace_log_lvl+0x25/0x30
> Mar  5 15:08:22 (none) user.warn kernel:  [<c0101e5a>] ? __switch_to+0xa/0x150
> Mar  5 15:08:22 (none) user.warn kernel:  [<c0146d42>] ?
> ipipe_check_context+0x92/0xb0
> Mar  5 15:08:22 (none) user.warn kernel:  [<c0115535>] ?
> sub_preempt_count+0x15/0x80
> Mar  5 15:08:22 (none) user.warn kernel:  [<c011559d>]
> sub_preempt_count+0x7d/0x80
> Mar  5 15:08:22 (none) user.warn kernel:  [<c0115e1e>]
> finish_task_switch+0x2e/0x80
> Mar  5 15:08:22 (none) user.warn kernel:  [<c01172ba>]
> ipipe_reenter_root+0x1a/0x60
> Mar  5 15:08:22 (none) user.warn kernel:  [<c0155a2d>] xnshadow_relax+0x9d/0x100
> Mar  5 15:08:22 (none) user.warn kernel:  [<c0155e08>]
> losyscall_event+0xe8/0x170
> Mar  5 15:08:22 (none) user.warn kernel:  [<c0155d20>] ?
> losyscall_event+0x0/0x170
> Mar  5 15:08:22 (none) user.warn kernel:  [<c0148150>]
> __ipipe_dispatch_event+0xd0/0x220
> Mar  5 15:08:22 (none) user.warn kernel:  [<c010d54a>]
> __ipipe_syscall_root+0x3a/0xe0
> Mar  5 15:08:22 (none) user.warn kernel:  [<c010320b>] system_call+0x2b/0x4c
> Mar  5 15:08:22 (none) user.warn kernel:  =======================
> Mar  5 15:08:22 (none) user.warn kernel: ---[ end trace 37b08dd71b141ea9 ]---
> Mar  5 15:08:22 (none) user.emerg rtlogd: : StopScan()
> 
> Thanks,
> 
> Mark
> 
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> 


-- 
Philippe.