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Date: Tue, 23 Mar 2010 18:06:31 +0100
From: Jan Kiszka <jan.kiszka@domain.hid>
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Subject: Re: [Xenomai-help] crash after termination
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To: Stefan Kisdaroczi <kisda@domain.hid>
Cc: xenomai-help <xenomai@xenomai.org>

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Stefan Kisdaroczi wrote:
> Hi Jan,
>=20
> Only user space using the native skin. Some additional notes:
> I'm using the freepascal compiler and link against libnative, i dont us=
e gcc.
> There is one process starting the other ten processes using fork() & ex=
ecl().
> The tasks do a lot of mode switching between primary/secondary.
> The stacksize for the tasks is 1MB. We only use between 4K-16K of stack=
 in our
> applications. So there should be still a bit less than 1 MB for socket =
calls
> and printf, is this to low ?

Also stack overflows must not crash the kernel, they may only cause
application crashes.

>=20
> I rebuilt the kernel without arcnet and isdn and disabled smp too, usin=
g 2.5.1.
> It still crashes every time on termination. If I pull the network conne=
ctor,
> I could start and shutdown the applications 5 times without problem. If=
 the
> network is connected, as soon as there is some network activity like ss=
h/samba
> on termination the box crashes. Sometimes it gets even back to the prom=
pt before
> crashing. Its a rtl8139 network card, but happens in a virtualbox-vm wi=
th a pcnet
> card too. In the traces is always a "do_IRQ+0x...", so I think the prob=
lem is
> related to IRQ-handling.

That sounds promising! If you can provide your test case to us (or me
privately), we could try to reproduce - inside a proper hypervisor which
has proper debugging facilities. :)

Jan


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