Re: pmap_extract(9) (was Re: xmd(4) (Re: XIP))

[Masao Uebayashi <uebayasi%tombi.co.jp@localhost>]

On Mon, Nov 08, 2010 at 10:48:45AM -0500, Thor Lancelot Simon wrote:
> On Mon, Nov 08, 2010 at 11:32:34PM +0900, Masao Uebayashi wrote:
> > 
> > I don't like "it's MD, period" attitude.  That solves nothing.
> 
> We've had pmaps which have tried to pretend they were pmaps for some
> other architecture (that is, that some parts of the pmap weren't
> best left MD).  For example, we used to have a lot of pmaps in our
> tree that sort of treated the whole world like a 68K MMU.
> 
> Performance has not been so great.  And besides, what -are- you going
> to do, in an MI way, about synchronization against hardware lookup?

Do you mean synchronization among processors?