On Mon, Nov 25, 2013 at 02:11:31PM +0800, Xiao Guangrong wrote: > > > > For example, nothing prevents lockless walker to move into some > > parent_ptes chain, right? > > No. > > The nulls can help us to detect this case, for parent_ptes, the nulls points > to "shadow page" but for rmaps, the nulls points to slot.arch.rmap. There > is no chance that the “rmap" is used as shadow page when slot-lock is held. > But meanwhile we will write protect non-last level sptes, no? Better to create separate slab caches for rmap and parent_ptes lists. -- Gleb. -- 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
