On Wed, 22 Dec 2010, James Bottomley wrote: > The kernel has an 8M tmpailas space (originally designed for copying > and clearing pages but now only used for clearing). The idea is > to place zeros into the cache above a physical page rather than into > the physical page and flush the cache, because often the zeros end up > being replaced quickly anyway. > > We can also use the tmpalias space for flushing a page. The difference > here is that we have to do tmpalias processing in the non access data and > instruction traps. The principle is the same: as long as we know the physical > address and have a virtual address congruent to the real one, the flush will > be effective. > > In order to use the tmpalias space, the icache miss path has to be enhanced to > check for the alias region to make the fic instruction effective. Very cool. "dependent" is misspelled in a couple places. Will test. Dave -- J. David Anglin dave.anglin@xxxxxxxxxxxxxx National Research Council of Canada (613) 990-0752 (FAX: 952-6602) -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
