Gilles Chanteperdrix wrote: > Jan Kiszka wrote: >> Gilles Chanteperdrix wrote: >>> Jan Kiszka wrote: >>>> Gilles Chanteperdrix wrote: >>>>> Daniele Nicolodi wrote: >>>>>> Booting a working 2.6.30 kernel I noticed this error message as first >>>>>> output on the console. Can it be related to my issue with more modern >>>>>> kernels and ipipe patches? >>>>>> >>>>>> ERROR: 8254 timer not connected to IO-APIC >>>>>> >>>>>> I have no idea of what it means. >>>>> Is APIC enabled in your kernel configuration? >>>> It likely is. >>>> >>>> I'm getting this error for many kernel releases now. It must be related >>>> to I-pipe's patching of the APIC or IO-APIC code. Irritating but mostly >>>> harmless. >>> What I mean is that when Xenomai wants to use the 8254 (which is the >>> case if the APIC is disabled in linux kernel configuration) and the 8254 >>> has become unreachable by Linux by some change in recent versions, >>> Xenomai timing subystem becomes screwed up. >>> >>> When, on the other hand, Xenomai wants to use the APIC, the fact that >>> the 8254 has become unreachable is harmless. >> ...but people continue to report this as bug. > > But I am not sure this bug is related to Xenomai at all.
At least it goes away when disabling CONFIG_IPIPE. It's harmless, it's just that the kernels cries a bit too loud. Jan
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