cgroups: Resource controller for open files

hulk inclusion
category: feature/cgroups
bugzilla: 50779
CVE: NA

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Add a lockless resource controller for limiting the number of open
file handles.  This allows us to catch misbehaving processes
and return EMFILE instead of ENOMEM for kernel memory limits.

Original link: https://lwn.net/Articles/604129/.After introduced
https://gitlab.indel.ch/thirdparty/linux-indel/commit


/5b1efc02.
All memory accounting and limiting has been switched over to the
lockless page counters. So we convert original resource counters to
lockless page counters.

Signed-off-by: Binder Makin <merimus@google.com>
Reviewed-by: Qiang Huang <h.huangqiang@huawei.com>
[cm: convert to lockless page counters]

Signed-off-by: luojiajun <luojiajun3@huawei.com>

v1->v2
fix some code
Reviewed-by: Jason Yan <yanaijie@huawei.com>

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>

Signed-off-by: Lu Jialin <lujialin4@huawei.com>
Reviewed-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>