Re: Sparc64 kernel message: BUG: soft lockup detected on CPU#3!

[David Miller]

From: Jan Engelhardt <jengelh@xxxxxxxxxxxxxxx>
Date: Tue, 17 Oct 2006 00:56:26 +0200 (MEST)

> 
> >> I have not seen this soft lockup so far, though I run a 2.6.16, most 
> >> likely using CONFIG_PROM_CONSOLE (redirected to ttya by prom) because
> >> the machine is not a SUN4V (which SUNHV seems to be for).
> >
> >You could be using one of the other serial drivers.
> >Check the boot messages and your kernel config.
> 
> Thanks for the hint. I am still a bit puzzled why there are so many 
> serial ports detected even though there is only ttya and ttyb on the 
> back:

What kind of system is this?

The two SU serial ports are usually for keyboard and mouse.

If you have 4 SAB ports, I'm guessing this is an Ultra250.
The 3rd and 4th SAB port are usually used for RSC on the
Ultra250 machines, the 1st and 2nd for normal ttya and ttyb
serial.
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