Re: Unexpected switches to in-band

["Łukasz Majewski" <lukma@nabladev.com>]

Hi Philippe,

> Łukasz Majewski <lukma@nabladev.com> writes:
> 
> >
> > For the record. Both Xenomai3 and Xenomai4 have been run on the
> > identical hardware.
> >
> > On Xenomai3 there are no issues...
> >  
> 
> Dovetail deals with those things, and this layer is shared between
> xenomai3 and xenomai4. So the situation is still unclear.

Just to clarify - the Xenomai3/Cobalt setup with 5.4 kernel + ipipe
patch was used. That (old) setup was NOT using the dovetail.

> 
> >> so either some
> >> traces are missing,  
> >
> > I will check if I can add more tracing.
> >  
> >> or something happens at hardware level which the
> >> kernel does not know about, as it may be seen on x86 with some
> >> uncooperative BIOS (e.g. SMIs, thermal events come to mind).  
> >
> > IIRC - Giulio reported the issue on some ARM system...
> >  
> 
> Yes, but he also reported that he could observe the same issue on
> xenomai3/cobalt as well. So we cannot rule out two distinct issues
> just yet.
> 



-- 
Best regards,

Lukasz Majewski

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