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Date: Wed, 18 Aug 2010 17:43:46 +0200
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai-core] xenomai 2.5.3/native, kernel 2.6.31.8 and fork()
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To: =?UTF-8?B?S3J6eXN6dG9mIELFgmFzemtvd3NraQ==?= <kb@domain.hid>
Cc: xenomai@xenomai.org

Krzysztof B=C5=82aszkowski wrote:
> On Wed, 2010-08-18 at 17:13 +0200, Gilles Chanteperdrix wrote:
>> Krzysztof B=C5=82aszkowski wrote:
>>> On Wed, 2010-08-18 at 16:30 +0200, Gilles Chanteperdrix wrote:
>>>> Krzysztof B=C5=82aszkowski wrote:
>>>>> On Wed, 2010-08-18 at 16:10 +0200, Gilles Chanteperdrix wrote:
>>>>>> Krzysztof B=C5=82aszkowski wrote:
>>>>>>> yes. i downloaded this config a while ago. need to setup new kern=
el
>>>>>>> 2.6.31.1 with xenomai.=20
>>>>>>> is 2.5.4 suitable for this test ?=20
>>>>>>> should i also use adeos-*.31.1-*2.4-09 patch ?
>>>>>> See the versions I posted in my test report yesterday. They were m=
ade
>>>>>> with this configuration.
>>>>>>
>>>>> ok. kernel 2.6.31.8, 2.5.4, ht will be enabled,
>>>>>
>>>>> for xenomai's configure i will pass following switches:
>>>>> --enable-x86-sep --enable-x86-tsc --enable-smp
>>>>>
>>>>> is this okay ?
>>>> Yes.
>>>>
>>> bingo !
>>>
>>> atest:~/xeno-test-254-2 # ./.try.sh=20
>>> main:79 heap 0x401b1000
>>> /root/xeno-test-254-2
>>> main:96 [823] pid 825
>>> main:89
>>> main:90 [825] pid 0
>>> main:99 [823] pid 825, status 00000b00
>>> main:100 [823] pid 825, WIFSIGNALED 0, WIFEXITED 1, rc 11
>>> 0
>>> atest:~/xeno-test-254-2 # uname -a
>>> Linux atest 2.6.31.8-xeno254-smp-ht #1 SMP Wed Aug 18 17:04:00 CEST 2=
010
>>> i686 i686 i386 GNU/Linux
>>>
>>>
>>> my fork() test works now with kernel configured with your config.
>>>
>>> so this try proves no doubt that userland (libc, pthreads and so on)
>>> work.
>>>
>>> and i guess that this memory corruption which caused fork to die insi=
de
>>> libc can be something specific to UP configuration. (i was thinking
>>> about using my config with smp this time)
>>>
>>> Thank you for sending me kernel configuration which pointed out an ar=
ea
>>> which should be searched further.
>> Yes, now if you find the culprit option, it would be nice to report he=
re
>> so that we can fix the I-pipe patch.
>>
>=20
> okay. will try to dig up.

As a first quick test, could you try and disable CONFIG_AUDITSYSCALL ?

--=20
					    Gilles.