On Thu, Aug 21, 2014 at 04:43:31PM +0100, Steve Capper wrote: > In order to implement fast_get_user_pages we need to ensure that the > page table walker is protected from page table pages being freed from > under it. > > This patch enables HAVE_RCU_TABLE_FREE, any page table pages belonging > to address spaces with multiple users will be call_rcu_sched freed. > Meaning that disabling interrupts will block the free and protect the > fast gup page walker. > > Signed-off-by: Steve Capper <steve.capper@xxxxxxxxxx> I'm happy to take this patch independently of this series. But if the whole series goes in via some other tree (mm): Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx> -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>