Re: Building a small sparc32 kernel

[Bob Breuer <breuerr@mc.net>]

Ludovic Courtès wrote:
> So, I now have a 2.6.14 SMP kernel I can boot from.  On my SS20, it
> doesn't even get to the point of spawning `init'.  I get a number of the
> following messages at boot time:
> 
>   esp0: Resetting scsi bus
>   esp0: SCSI bus reset interrupt
>   esp0: DMA error a4400302

Are you using multiple drives?  I've seen this problem before when using
multiple drives, even with a 2.6 UP kernel, but I've not had a problem
when only actively using one drive.

> And finally, I get spinlock debugging messages followed by a stack trace
> telling that something went wrong ("BUG: spinlock lockup on CPU#2",
> etc.), and nothing more.  I guess I'm going to have to capture the
> console output via a serial line in order to provide you with meaningful
> data.

Try configuring the kernel with spinlock debugging turned off.

> The machine has two SuperSPARC 390Z50.  In your original message you
> mentioned that support for SuperSPARC II was relatively stable, so maybe
> this just means that support for this older SuperSPARC flavor is not yet
> in such a good shape?  ;-)

I think you're almost there.  I don't see any reason why a pair of older
SuperSPARCs wouldn't work, but I don't have any to test against.

Bob