On Thu, Mar 08, 2001 at 10:27:15PM +0000, Richard Earnshaw wrote:

 > It doesn't matter too much at the moment, since we don't cache the page 
 > tables, but I can find no reference in the TRM to the write buffer in 
 > relation to TLB walks.  Given the above, my suspicion is that the TLB 
 > walking hardware won't snoop the write buffer either.

Indeed -- have you measured how much faster the system is if you
enable cacheing the page tables, and do the appropriate wb-drain
and cache-cleans before TLB invalidations?

-- 
        -- Jason R. Thorpe <thorpej@zembu.com>