Re: [Xenomai-core] Kernel lockup with lapic on old AMD Athlon

[Wolfgang Grandegger <wg@domain.hid>]

Gilles Chanteperdrix wrote:
> Wolfgang Grandegger wrote:
>  > Hello,
>  > 
>  > here is the boot log of an hangup of 2.6.20 with I-pipe 1.7-02 and 
>  > Xenomai todays trunk. I already reported this hangup a while ago but now 
>  > I get an oops. At that time Gilles said that lapic on old Athlons might 
>  > be buggy. Does the attached boot log confirm this assumption? 2.6.20-rt8 
>  > is working, BTW.
> 
> What I had observed with an old Athlon were some random lockups. I was
> trying to setup a samba print server at the time, and the lockup always
> occured when some windows machine was trying to use the shared printer
> through network. I think the IO-APIC was also enabled. Then, at some
> later time, I read somewhere on the internet that the IO-APIC or LAPIC
> could be buggy on some Athlons, so I understood what had happened to
> me. So, I did not investigate this issue any further.

I didn't either, especially because it works with lapic disabled in the 
kernel config. I just thought that this oops might be useful to somebody.

Wolfgang.