[RFC][PATCH 0/10] memcg clean up and some fixes for softlimit (Sep25)

[KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>]

As I posted Sep/18, I'm now planning to make memcontrol.c cleaner.
I'll post this to Andrew in the next week if no objections.
(IOW, I'll post this again. So, review itself is not very urgent.)

In this version, I dropped batched-charge/uncharge set.
They includes something delicate and should not be discussed in this thread.
The patches are organized as..

Clean up/ fix softlimit charge/uncharge under hierarchy.
1. softlimit uncharge fix
2. softlimit charge fix
These 2 are not changed for 3 weeks.

Followings are new (no functional changes.)
3.  reorder layout in memcontrol.c
4.  memcg_charge_cancel.patch from Nishimura's one
5.  clean up for memcg's percpu statistics
6.  removing unsued macro
7.  rename "cont" to "cgroup"
8.  remove unused check in charge/uncharge
9.  clean up for memcg's perzone statistics
10. Add commentary.

Because my commentary is tend to be not very good, review
for 10. is helpful ;)

I think this kind of fixes should be done while -mm queue is empty.
Then, do this first.

Thanks,
-Kame




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