Re: rbtree for uvm_pagelookup()

[Andrew Doran <ad%netbsd.org@localhost>]

On Mon, Jun 02, 2008 at 05:48:01PM +0200, Joerg Sonnenberger wrote:

> On Mon, Jun 02, 2008 at 03:20:31PM +0100, Andrew Doran wrote:
> > - On x86, don't bother using sse to copy/zero pages on demand.  It turns out
> >   not to be worth it.
> 
> You mean that on demand copy/zero will use the caching modifying
> versions of the operations in contrast to the idle loop?

Yes. If copy/zero we already know that something is using the page. I tried
a variety of sse-using routines but none of them matched rep; movsl/stosl
in that case.

Andrew