From: Michael Neuling <mikey@neuling.org>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev@ozlabs.org, will_schmidt@vnet.ibm.com,
Paul Mackerras <paulus@samba.org>
Subject: Re: [PATCH] fixes for the SLB shadow buffer
Date: Thu, 02 Aug 2007 19:03:25 +1000 [thread overview]
Message-ID: <17854.1186045405@neuling.org> (raw)
In-Reply-To: <1186045096.5495.617.camel@localhost.localdomain>
> 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
next prev parent reply other threads:[~2007-08-02 9:03 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-01 4:56 [PATCH] fixes for the SLB shadow buffer Michael Neuling
2007-08-01 5:28 ` Paul Mackerras
2007-08-01 6:02 ` Michael Neuling
2007-08-01 21:48 ` Will Schmidt
2007-08-02 5:56 ` Michael Neuling
2007-08-02 7:31 ` Benjamin Herrenschmidt
2007-08-02 8:56 ` Michael Neuling
2007-08-02 8:58 ` Benjamin Herrenschmidt
2007-08-02 9:03 ` Michael Neuling [this message]
2007-08-02 9:14 ` Benjamin Herrenschmidt
2007-08-02 9:28 ` Michael Neuling
2007-08-03 1:55 ` Michael Neuling
2007-08-03 2:50 ` Benjamin Herrenschmidt
2007-08-01 22:33 ` Benjamin Herrenschmidt
2007-08-01 23:32 ` Michael Neuling
2007-08-02 0:05 ` Benjamin Herrenschmidt
2007-08-02 1:04 ` Benjamin Herrenschmidt
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