> > > By design that shouldn't happen: the idea behind COW breaking is > > > that before it breaks, the page is read only ... this means that > > > processes can have clean cache copies of it, but never dirty cache > > > copies (because writes are forbidden). > > > > That must be design, I agree. > > > > To keep this condition (no dirty cache for COW page), we need to flush > > cache before ptep_set_wrprotect. That's my point. Is it possible that a sleep/reschedule could cause the cache to become dirty again before it is write protected? 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
