Re: Page fault scalability patch V18: Drop first acquisition of ptl

Benjamin Herrenschmidt
2005-03-03T06:30:28Z

On Fri, 2005-03-04 at 04:19 +1100, Nick Piggin wrote:

> You don't want to do that for all architectures, as I said earlier.
> eg. i386 can concurrently set the dirty bit with the MMU (which won't
> honour the lock).
>
> So you then need an atomic lock, atomic pte operations, and atomic
> unlock where previously you had only the atomic pte operation. This is
> disastrous for performance.

Of course, but I was answering to David about sparc64 which uses
software TLB load :)

Ben.