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

[Joakim Tjernlund]

> Daniel Jacobowitz wrote:
>
> > That is, in fact, incorrect.  It's fatal from userland.  I experimented
> > with it just a couple of months ago.
>
> Uh oh....was this discussed and I missed it?
>
> Will you fill me in on what you were trying to do and how it failed?

I and Daniel discussed it, mostly in private. It fails horribly for
me too in user space(init hangs, don't know any details) and that's why
I split copy_tofrom_user into 2 functions( see yesterdays mail) as a test. With that
change my system is stable.

   Jocke


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