Hi, Here is my recent changes in my patchset to bypass charges from the root cgroup if no other memcgs are present in the system. At the time, the main complaint came from Michal Hocko, correctly pointing out that if hierarchy == 0, we can't bypass the root memcg forever and at some point, we need to transfer charges. This is now done in this patch. DISCLAIMER: I haven't yet got access to a big box again. I am sending this with outdated numbers in the interest of having this in the open earlier. However, the main idea stands, and I believe the numbers are still generally valid (albeit of course, it would be better to have them updated. Independent evaluations always welcome) * v2 - Fixed some LRU bugs - Only keep bypassing if we have root-level hierarchy. Glauber Costa (5): memcg: make nocpu_base available for non hotplug memcg: provide root figures from system totals memcg: make it suck faster memcg: do not call page_cgroup_init at system_boot memcg: do not walk all the way to the root for memcg include/linux/memcontrol.h | 72 ++++++++++--- include/linux/page_cgroup.h | 28 ++--- init/main.c | 2 - mm/memcontrol.c | 243 ++++++++++++++++++++++++++++++++++++++++---- mm/page_cgroup.c | 150 ++++++++++++++------------- 5 files changed, 382 insertions(+), 113 deletions(-) -- 1.8.1.2 -- 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>