macallan@NetBSD.org wrote:

> my O2 occasionally hangs right before the 'scsibus*: waiting two 
> seconds...' message, right after 'biomask 0x...' - I tracked it down to 
> _splnone() in arch/mips/mips/locore.S
> Now my MIPS-fu is weak but I can't see anything in there that would 
> cause a hang.
> In case it matters the CPU is a 200MHz R5k with 1MB cache.

Maybe it's a known problem, caused by interrupt storm from mec,
and powercycle may fix it.

IMO, interrupt dispatchers of sgimips should be rewritten
to check return values whether interrupts is actually handled
or not.
---
Izumi Tsutsui