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From: Michael Neuling <mikey@neuling.org>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: [PATCH] fixes for the SLB shadow buffer 
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Date: Thu, 02 Aug 2007 19:03:25 +1000
Message-ID: <17854.1186045405@neuling.org>
Cc: linuxppc-dev@ozlabs.org, will_schmidt@vnet.ibm.com,
	Paul Mackerras <paulus@samba.org>
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> On Thu, 2007-08-02 at 18:56 +1000, Michael Neuling wrote:
> > > > But even in the case of a checkpoint restart, the ordering will be
> > > > preserved as the NIA we get as part of the checkpoint will have
> > all
> > > > previous instructions complete and none of the following
> > instructions
> > > > started.
> > > 
> > > Instruction completion isn't enough to ensure storage ordering. The
> > > stores may well be complete but the data still in separate store
> > queues.
> > 
> > POWER6 flushes the store queues when we take a checkpoint.  
> 
> Ok, that was missing from your description :-)

Sorry... so ditch the barriers?

Mikey