Hi, Kame. On Tue, Jul 27, 2010 at 5:13 PM, KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> >> Perhaps the mem_section array. Using a symbol that is part of >> the model pre-checks can remove a global symbol lookup and has the side >> effect of making sure our pfn_valid is for the right model. >> > > But yes, maybe it's good to make use of a fixed-(magic)-value. fixed-magic-value? Yes. It can be good for some debugging. But as Christoph pointed out, we need some strict check(ex, PG_reserved) for preventing unlucky valid using of magic value in future. But in fact I have a concern to use PG_reserved since it can be used afterward pfn_valid normally to check hole in non-hole system. So I think it's redundant. Hmm.. -- Kind regards, Minchan Kim -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href