[PATCH][for -mm] Fix and Enhancements for memory cgroup [0/6] intro

[KAMEZAWA Hiroyuki]

Hi, Balbir-san
This is a patch set against memory cgroup I have now.
Reflected comments I got.

= 
[1] charge refcnt fix patch     - avoid charging against a page which is being 
                                  uncharged.
[2] fix-err-handling patch      - remove unnecesary unlock_page_cgroup()
[3] lock and page->cgroup patch - add helper function for charge/uncharge
[4] avoid handling no LRU patch - makes mem_cgroup_isolate_pages() avoid
                                  handling !Page_LRU pages.
[5] migration fix patch         - a fix for page migration.
[6] force reclaim patch         - add an interface for uncharging all pages in
                                  empty cgroup.
=

BTW, which way would you like to go ?

  1. You'll merge this set (and my future patch) to your set as
     Memory Cgroup Maintainer and pass to Andrew Morton, later.
     And we'll work against your tree.
  2. I post this set to the (next) -mm. And we'll work agaisnt -mm.

not as my usual patch, tested on x86-64 fake-NUMA.

Thanks,
-Kame