Greetings SGI Origin wizards,

I'm doing some SMP testing on an SGI Origin 200 (ip27).

I started with a 2.6.15 vintage kernel and added changes from here:
ftp://ftp.linux-mips.org/pub/linux/mips/people/ralf/ip27/

It boots both processors and runs OK.

Then I turn on CONFIG_DEBUG_SPINLOCK and CONFIG_DEBUG_SPINLOCK_SLEEP, 
and get lots of lockup messages. A typical one is below.

Anyone seen this? Some of the low-level lock code has R10000_LLSC_WAR 
versions, but I don't see anything wrong there.