[-mm][PATCH 0/6] memcg: radix tree page_cgroup v3.

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

Hi, this is v3. This includes some fixes and some experimentals.

Still on -rc5-mm1. I'm now wondering how to merge and test this set...

Major Changes from previous one:
 - fixed typos.
 - merged prefetch in page_cgroup.
 - added some experimentals.

patch 1-3 are already posted patches. patch 4 is for removing redundant codes.
I think patch 1-4 are ready to be tested widely.
patch 5/6 are experimantal but shows good numbers.

This is performance result.
(CONFIG is changed to use sparsemem_vmemmap)

==
BYTE UNIX Benchmarks (Version 4.1.0) Run execl. x86_64/SMP/2CPUs.
Higher value is better. All are measured just after boot.

ENVIRON        : TEST               BASELINE     RESULT      INDEX

mem_cgorup=off : Execl Throughput       43.0     3150.1      732.6
before this set: Execl Throughput       43.0     2932.6      682.0
after patch 1-4: Execl Throughput       43.0     2899.1      674.2
after patch 1-6: Execl Throughput       43.0     3044.2      708.0
==

Because patch 5/6 is very aggressive but attractive,
I'd like to hear review/test comments.

Thanks,
-Kame 

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