From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Sat, 28 Nov 2009 09:25:05 +0100
From: Jan Kiszka <jan.kiszka@domain.hid>
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Subject: Re: [Xenomai-core] Bug in rt_task_sleep() ?
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To: =?ISO-8859-1?Q?Michael_L=F6ffler?= <ml+xenomai@domain.hid>
Cc: xenomai@xenomai.org

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Michael L=F6ffler wrote:
> Hello List!
>=20
> I have an application running rt_task_sleep() in a loop. After a more o=
r
> less random number of loops, something up to 5000 cycles, the system
> reboots with the following error message:
>=20
> Kernel panic - not syncing:
> BUG!
> <4>BUG: failure at kernel/ipipe/core.c:319/__ipipe_restore_root()!
>=20
> For me it's not a bigger issue, as I can replace it with usleep() and

usleep means that your RT task leaves real-time space for the execution
of this Linux service. So you effectively avoid the permanent switch
between primary and secondary mode that your demo currently triggers due
to rt_task_sleep vs. printf.

> everything works fine, but maybe it's something, someone could have a
> closer look at. On my system (blackfin537-stamp, uclinux2008, xenomai
> 2.4.0) it can be reproduced with the following code:

Already tried with a non-outdated Xenomai release, namely 2.4.10 or 2.5
git? It makes no sense hunting already fixed bugs.

Jan


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