On Tue, Oct 05, 2010 at 06:22:17AM -0300, Marcelo Tosatti wrote: > It'll not be so advantageous for ksm because there should be read-faults > very rarely on that case. It'll also make all clean swapcache dirty for no good. > Will post. If we've to walk pagetables twice, why don't you do this: writable=1 get_user_pages_fast(write=write_fault) if (!write_fault) writable = __get_user_pages_fast(write=1) That will solve the debugging knob and it'll solve ksm and it'll be optimal for read swapins on exclusive clean swapcache too. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
