hal6, hal7, hal12, hal16 ... ?

Philippe Gerum rpm at xenomai.org
Sat Oct 16 13:27:25 CEST 2004


On Sat, 2004-10-16 at 05:54, Hannes Mayer wrote:
> Philippe Gerum wrote:
> > On Fri, 2004-10-15 at 19:04, Hannes Mayer wrote:
> > 
> >>Hi all!
> >>
> >>I wondered a few times about the different hal's of RTAI.
> >>In RTAI3.0 the names for the patches for kernel 2.4 start
> >>with hal12, in RTAI3.1 with hal16 for kernel 2.4 and
> >>hal6 & 7 for kernel 2.6.
> >>
> >>Are those version numbers ?
> >>If so, why have the kernel patches for kernel2.6 lower
> >>numbers than for 2.4 kernels in RTAI3.1 ?
> >>
> > 
> > 
> > Because hal patches are in fact plain unmodified Adeos patches in
> > disguise, so there are named after the source Adeos release numbers;
> > which is somewhat simpler for the maintainer to know what he is doing
> > when dealing with both Adeos and RTAI codebases. Since Adeos was first
> > implemented for 2.4.18, there have been more releases for 2.4 up to now
> > than for the more recent 2.6 kernel, but latest releases of both
> > branches are functionally equivalent.
> > 
> > This said, the reasons for such rename have disappeared now, so the next
> > fusion release will use the original Adeos names directly; I'll submit
> > the same change for 3.2 and Paolo will decide for it.
> 
> Thank you very much Philippe!
> 
> I had a look at the adeos site and found this:
> adeos-linux-2.4.27-i386-r16.patch -> hal16
> adeos-linux-2.6.8.1-i386-r7.patch -> hal7
> 

True.

> My question was more related to stability than functionally.
> The kernel2.4 branch of Adeos is older, so it is more tested and therefore
> more stable than the kernel2.6 branch ? So I assume RTAI with hal16 is
> considered more stable too ?
> 

I'd say that all Adeos incarnations in their latest releases for both
2.4 and 2.6 have the same level of stability. Using one or the other
should be a consequence of going for a given kernel branch, not the
other way around. AFAIC, I'm exclusively working with 2.6 since January.

> Thank you again!
> 
> Best regards,
> Hannes.
> 
> 
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-- 

Philippe.





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