Improved copy_page() function, about 30% speed up for mpc860!

[Joakim Tjernlund]

> > > I can't tell you what revs they were, but all of the MPC860's I could
> > > get my hands on here the last time I tried to use dcbz on them were
> > > faulty. You may just not be triggering the bug.
> >
> > hmm, what boards was this?
> > I am planning to a larger test here with all our custom mpc860 and mpc862 boards. We have them in
> > 100, 80 and 50 MHZ variants.
> >
> > May be the bug is related to board design?  Is there an official errata from Motorla
> > regarding this bug? I can't find any.
> >
> > Anyhow I had a flaw in my testprogram, so you can throw this version of copy_page() away.
> > But enabling the use of dcbz in the current version still gives me 30%+ performance increase.
> >
> > See the embedded list for details.
> >
> >  Jocke

I found a link that may have relevance regarding  the dcbz problem , can anybody confirm this?
http://www.uwsg.iu.edu/hypermail/linux/kernel/0012.0/0529.html

    Jocke

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