[PATCH v3][0/6] memcg: prevent -ENOMEM in pre_destroy()

[KAMEZAWA Hiroyuki]

Hi, here is v3 based on memcg-devel tree.
git://github.com/mstsxfx/memcg-devel.git

This patch series is for avoiding -ENOMEM at calling pre_destroy() 
which is called at rmdir(). After this patch, charges will be moved
to root (if use_hierarchy==0) or parent (if use_hierarchy==1), and
we'll not see -ENOMEM in rmdir() of cgroup.

v2 included some other patches than ones for handling -ENOMEM problem,
but I divided it. I'd like to post others in different series, later.
No logical changes in general, maybe v3 is cleaner than v2.

0001 ....fix error code in memcg-hugetlb
0002 ....add res_counter_uncharge_until
0003 ....use res_counter_uncharge_until in memcg
0004 ....move charges to root is use_hierarchy==0
0005 ....cleanup for mem_cgroup_move_account()
0006 ....remove warning of res_counter_uncharge_nofail (from Costa's slub accounting series).

Regards,
-Kame

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