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

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

On Fri, 2010-08-20 at 11:54 +0200, Gilles Chanteperdrix wrote:
> Krzysztof Błaszkowski wrote:
> >> Yes, now if you find the culprit option, it would be nice to report here
> >> so that we can fix the I-pipe patch.
> >>
> > 
> > 
> > I do know it still. All i have are two configs. One which does not work
> > and one working. I have tried so far breaking working one and also
> > fixing broken. Both attempts have been unsuccessful.
> > 
> > I tried many "obvious" settings mainly in "processor type and features"
> > with no luck.
> > 
> > This process must take some time ( i can't spend whole days on trying
> > one-by-one each difference, recompile kernel,ync target's rootfs,
> > reboot target and run fork regression test even that many steps i have
> > automated)
> 
> ever heard about bisecting ?

sure i had.


>  List the diffs between the two configs
> apply half of them
> if it still works, apply half of the rest
> if it does not unapply half of the one you applied
> etc...
> if there are 65000 differences, you will get to the result in 16 steps.
> you can keep the same rootfs, all you have to do is rebuild the kernel
> (without "make clean", so that only what changed in the .config is
> re-compiled).
> 

i used to use more fine grained changes set until it made me tired.

and i as you may know most changes in "processor features" lead to
recompile whole kernel - by not cleaning won't save anything.


> It should take just an hour or two.

poss. but i don't think so.

Regards,

> 
> > 
> > Regards,
> 
> 


-- 
Krzysztof Blaszkowski