Re: [Xenomai-core] xenomai 2.5.3/native, kernel 2.6.31.8 and fork()

["Krzysztof Błaszkowski" <kb@domain.hid>]

On Wed, 2010-08-18 at 15:39 +0200, Gilles Chanteperdrix wrote:
> Krzysztof Błaszkowski wrote:
> > On Wed, 2010-08-18 at 14:37 +0200, Gilles Chanteperdrix wrote:
> >> Krzysztof Błaszkowski wrote:
> >>>>> rather i use native clean x86 environment (on e.g. x86_64)
> >>>> I do this all the time, and never had any problem.
> >>> i had lots with header files mainly.
> >> Well, the glibc and Xenomai header files are the same on 64 bits and 32
> >> bits machines... of course, if you are talking about other libs...
> > 
> > 
> > ;) i don't mean Xenomai and degree of crosscompilation complexity
> > depends on what you try to compile.
> > i remember a few years ago it was not so funny.
> > 
> >>> and i am happy with my way.
> >>>
> >>>> Also, why not running 64 bits code on your atom? There are some x86_32
> >>>> only atoms? What about SMP?
> >>> for some other constraints i will not mention i use 32 bits now.
> >>>
> >>> this is single core cpu so no point to use smp for e.g. 8 cpus (nor
> >>> bigsmp)
> >> Well, my atom has hyper-threading, so, SMP can be used, Linux sees two
> >> threads. I suspect yours has hyper-threading too, since Linux mentions
> >> that it sees an ACPI SMP table, but usually, hyper-threading needs to be
> >> enabled at BIOS level.
> >>
> > 
> > yes, it has "ht". disabled now. i thought that i don't want to try to
> > solve superposition of various corner cases and stuck on solving this.
> > 
> > otoh, i could create such case. did i ?
> > 
> > (btw, rtai 3.7 works)
> 
> This does not give us any clue, since neither the I-pipe patch nor the
> heap code are shared. 

yes, i could not mention it.


> But as I said, I suspect the bug is rather in the
> kernel configuration than anywhere else.

i see.

> 
> We are going to try something else. The .config I use on my atom is here:
> http://git.xenomai.org/?p=mkrootfs.git;a=blob_plain;f=boards/generic/atom-32/config-2.6.31;hb=HEAD
> 
> Could you start from this configuration, adding only what is needed to
> boot your box (root filesystem device controller, or network controller
> if booting over nfs, root filesystem), then test this kernel?
> 

yes. i downloaded this config a while ago. need to setup new kernel
2.6.31.1 with xenomai. 
is 2.5.4 suitable for this test ? 
should i also use adeos-*.31.1-*2.4-09 patch ?



-- 
Krzysztof Blaszkowski