Re: Fix for sparc64 cpu hangs.

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From: Bernd Zeimetz <bernd@xxxxxxx>
Date: Fri, 16 Nov 2007 22:17:07 +0100

> The sysrq-g output is attached, I hope you can make sense out of it.
> We'll also add some extra workload to the other machines here to try to
> trigger the bug on other CPUs, too.

I just got back from my vacation and started looking at these
dumps.  I think there might be some bug in cheetah_xcall_deliver(),
I'll try to diagnose this some more.

If you cannot reproduce this bug on non-Ultra-III systems that
would help confirm or deny my theory.  Have you been able to
trigger this on your Ultra-II machine for example?  If so, what
do the sysrq-g traces look like there?
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