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Date: Wed, 23 Mar 2005 13:05:44 -0300
From: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
To: Dan Malek <dan@embeddededge.com>
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Cc: "Smith, Craig" <craig.d.smith@siemens.com>, paulus@samba.org,
	linux-ppc-embedded <linuxppc-embedded@ozlabs.org>
Subject: Re: Linux 2.6.x on 8xx status
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On Wed, Mar 23, 2005 at 11:12:11AM -0500, Dan Malek wrote:
> 
> On Mar 23, 2005, at 5:25 AM, Marcelo Tosatti wrote:
> 
> >You misunderstood: get_mmu_context() _wont_ be called if the mm 
> >structures
> >are the same.
> 
> I understood.  At most, get_mmu_context() will only do a 'tlbia'
> instruction, I didn't see your reason for thinking this would have
> an effect on the tlbie usage.

OK. That is not a good reason, indeed.

> >>Well, that's interesting.  It's likely to only happen on an 860 
> >>variant
> >>that
> >>has the large TLB.
> >
> >For what reasoning?
> 
> My initial debugging seemed to indicate a stale TLB entry.  With
> the larger TLB this is more likely to happen.  The bug was never
> seen on the 823/850 with smaller TLBs.
> 
> I have a new 8xx board now, so I'll have to start working on these
> issues as well.

OK!