Re: [Xenomai-help] crash after termination

[Stefan Kisdaroczi <kisda@domain.hid>]

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Am 20.03.2010 16:53, schrieb Jan Kiszka:
> Stefan Kisdaroczi wrote:
>> hi all,
>>
>> after termination of my xenomai applications, my box crashed often (3 of 4 times) with xenomai 2.5.1.
>> Today I updated to current git-2.5, rebuilt xenomai and the kernel. Still crashes.
>> I have captured two traces over a serial connection. I have attached the kernel config, the two
>> traces and the cpuinfo (UP x86 Pentium III). Help is welcome. Thank you.
> 
> Both crashes seem to be caused by corrupted skbs. There are (at least)
> two uncommon network component in your kernel: ARCNET and ISDN. Do you
> make use of them or are they just passively loaded? If the former: Can

Just passively loaded.

> you retry without them? >(The Kernel's ISDN stuff is of, well, mixed
> quality, and ARCNET is so old and uncommon that the code /may/ have
> bit-rotted -

I disable them.

> just an attempt to detract the attention from Xenomai. :) )

I think the problem is in my apps, but I had some hope that
some changes for 2.5.2 (about thread cleanup,fork) would help.

> What other network components are actively involved in your scenario?

Only TCP/IP (non-realtime). Currently a dozen xenomai native tasks are
doing standard socket calls. If everything works, there will be about
60 tasks using socket calls, but its still a long way.

I focus now first on another problem I have in my apps with a shared heap,
so one question about that: There was no H_NONCACHED flag at the time I
did write some library code. I use a rt_heap as shared memory between 8
processes on x86. According to the documentation H_NONCACHED is only
relevant for ARM, is that true?

Thanks for the help Jan.
Stefan


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