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Date: Sun, 13 Jan 2013 13:34:57 -0600
From: John Morris <john@zultron.com>
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Subject: [Xenomai] 3.5.3 posix/mprotect fail "sigdebug_handler triggered"
 (Was: Re: Kernel OOPS during regression tests)
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To: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Cc: Jan Kiszka <jan.kiszka@web.de>, Xenomai <xenomai@xenomai.org>

Another subject change here...

On 01/13/2013 06:18 AM, Gilles Chanteperdrix wrote:
> On 01/13/2013 12:23 PM, Jan Kiszka wrote:
> 
>> On 2013-01-13 07:50, John Morris wrote:
>>> On 01/12/2013 01:02 PM, Gilles Chanteperdrix wrote:
>>>> On 01/12/2013 06:26 PM, John Morris wrote:
>>>>
>>>>> 1)  Most worrisome is "kernel BUG at mm/mmap.c:2313!   invalid opcode:
>>>>> 0000 [#2] SMP".  Is this related to HEAPSZ or STACKPOOLSZ?  My mind is
>>>>> getting foggy about all the things I've seen, but it seems like it was
>>>>> happening earlier in the tests until these config values were quadrupled.
>>>>
>>>>
>>>> Try disabling transparent hugepages, as noted by Jan.
>>>>
>>>>>
>>>>> 2)  posix/mprotect is failing:  "FAILURE: sigdebug_handler triggered,
>>>>> reason 2    memory write after exec enable".
>>>>>
>>>>> 3)  FPU warning:  "fptest.h:24: Warning: Linux is compiled to use FPU in
>>>>> kernel-space.    For this reason, switchtest can not test using FPU in
>>>>> Linux kernel-space."
>>>>>
>>>>> Regression test run log:
>>>>> http://www.zultron.com/static/2013/01/xenomai/foo-xeno-regression-test.log
>>>>
>>>>
>>>> You should normally use the -l option to use a non default "load", and
>>>> run the test for a long time.
>>>>
>>>> See xeno-regression-test --help and dohell --help
>>>>
>>>>
>>>
>>>
>>> Jan's fix appears to have solved 1) above, but 2) posix/mprotect is
>>> still failing.  Thanks for the xeno-regression-test tips; ran a couple
>>> more (not for a long time, will do that later).
>>
>> Can you clarify how your setup looks like? The kernel is a vanilla 3.5.3
>> patched with ipipe-core-3.5.3-x86-2.patch? And then you just disabled
>> THP? Or did you switch to my for-upstream/3.5 I-pipe branch?

Vanilla 3.5.3, released Xenomai 2.6.2, THP disabled.

> I have merged the bugfixes from your branch in my branch in addition to
> other bug fixes, so, I would recommend using this one.

You must mean the xenomai-2.6.git tree, master branch.  I'll begin using
that.

	John