On Mon, 2010-03-01 at 18:58 +0100, Andrea Arcangeli wrote: > > But nothing risks to break at build time, simply any arch with > transparent hugepage support also has to implement > __get_user_pages_fast. Disabling irq and using __get_user_pages_fast > looked the best way to serialize against split_huge_page here (rather > than taking locks). PowerPC uses rcu-free'd pagetables for gup_fast() iirc, so no need to disable IRQs there. -- 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=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>