[PATCH 6/7] powerpc/mm: 64-bit: tlb handler micro-optimization
Benjamin Herrenschmidt
benh at kernel.crashing.org
Thu May 19 07:54:48 EST 2011
On Wed, 2011-05-18 at 16:51 -0500, Scott Wood wrote:
> On Thu, 19 May 2011 07:37:47 +1000
> Benjamin Herrenschmidt <benh at kernel.crashing.org> wrote:
>
> > On Wed, 2011-05-18 at 16:05 -0500, Scott Wood wrote:
> > > A little more speed up measured on e5500.
> > >
> > > Setting of U0-3 is dropped as it is not used by Linux as far as I can
> > > see.
> >
> > Please keep them for now. If your core doesn't have them, make them an
> > MMU feature.
>
> We have them, it was just an attempt to clean out unused things to speed up
> the miss handler. I'll drop that part if you think we'll use it in the
> future.
I never know for sure ... damn research people ... :-)
I'd rather keep them for now, does it make a significant difference ?
Cheers,
Ben.
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