On Tue, May 30, 2006 at 02:14:19PM +1000, Benjamin Herrenschmidt wrote:

This fixes by allowing the updating of the protection bits in the native
hash handling to also set (but not clear) the "C" bit, and, in order to
also improve performances in the general case, by always setting that
bit on newly inserted hash PTE so that writeback really never happens.

Good catch!

However, you'll have a writeback on the R bit too, you should set that
together with C.


-Olof