Errata 67/77 / walnut bugs (was: Re: Erratum 51 bugfix?)
Dan Malek
dan at mvista.com
Wed Sep 19 04:52:59 EST 2001
David Gibson wrote:
> I suspect #77 is the cause of the problems I'm seeing on the walnut
> now - it mostly works, but every so often a process will freeze up
> immune to signals.
Hmmm...We did tons of debugging on this one and pointed it out to
IBM a while back. The ATOMIC_SYNC_FIX configuration option was the
solution to cure it. As you can tell, it tries to address the
pipeline issues surrounding the stwcx. I kind of hope it is the
problem, and a better silicon bug fix will solve it.
-- Dan
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