On Wed, Nov 23, 2011 at 9:12 PM, Johannes Weiner <hannes@xxxxxxxxxxx> wrote: > From: Johannes Weiner <jweiner@xxxxxxxxxx> > > Pages have their corresponding page_cgroup descriptors set up before > they are used in userspace, and thus managed by a memory cgroup. > > The only time where lookup_page_cgroup() can return NULL is in the > page sanity checking code that executes while feeding pages into the > page allocator for the first time. > This is a legacy check from the days when we allocated PC during fault time on demand. It might make sense to assert on !pc in DEBUG_VM mode at some point in the future Balbir -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
