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Subject: Re: [PATCH][WIP][RFC] powerpc: fixup lwsync at runtime
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Kumar Gala <galak@kernel.crashing.org>
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Date: Sun, 22 Jun 2008 10:20:36 +1000
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On Sat, 2008-06-21 at 11:07 -0500, Kumar Gala wrote:
> 
> > Remind me why we want to do that ? ie. can't we just use lwsync
> > unconditionally ? It's supposed to degrade to sync on CPUs that
> don't
> > support it, or is that broken on some parts ?
> 
> I believe its broken on e500v1/v2.  However I'll double check.

An option is that if you get a program check instead, you can "fixup"
the sync from the exception too...

Ben.