[PATCH 0/7] memcg : more fixes and clean up for 2.6.28-rc

[KAMEZAWA Hiroyuki]

This is a set of patches which I'm now testing, and it seems it passed
small test. So I post this.

Some are bug fixes and other are clean ups but I think these are for 2.6.38.

Brief decription

[1/7] remove buggy comment and use better name for mem_cgroup_move_parent()
      The fixes for mem_cgroup_move_parent() is already in mainline, this is
      an add-on.

[2/7] a bug fix for a new function mem_cgroup_split_huge_fixup(),
      which was recently merged.

[3/7] prepare for fixes in [4/7],[5/7]. This is an enhancement of function
      which is used now.

[4/7] fix mem_cgroup_charge() for THP. By this, memory cgroup's charge function
      will handle THP request in sane way.

[5/7] fix khugepaged scan condition for memcg.
      This is a fix for hang of processes under small/buzy memory cgroup.

[6/7] rename vairable names to be page_size, nr_pages, bytes rather than
      ambiguous names.

[7/7] some memcg function requires the caller to initialize variable
      before call. It's ugly and fix it.


I think patch 1,2,3,4,5 is urgent ones. But I think patch "5" needs some
good review. But without "5", stress-test on small memory cgroup will not
run succesfully.

Thanks,
-Kame

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