Issue: #I6LPWU
Signed-off-by: Nguzhihao4 <guzhihao4@huawei.com>
Change-Id: I7b558fa46239081890ae005de65ba8d2bba1d134

BREAKING CHANGE:
支持cgroups对外变更:
1.在proc目录下支持plimits目录，支持ipc, pid, memory, devices, sched控制器

Close #I6GVPL
Signed-off-by: Nzhushengle <zhushengle@huawei.com>
Change-Id: Ib996e07bf148abce9e40290d6188b763b52e89bb

背景：同一个进程的多个线程读写同一个PTE时，由于PTE无保护，存在竞态问题。
方案：新增spinlock保护PTE，包括大锁跟小锁。大锁：一个进程只有一个spinlock锁，多个线程
读写PTE时竞争一把锁，锁的内存占用小，但系统性能降低；小锁：每个页表持有一把spinlock，
由于锁是page结构体的一个字段，内存消耗较大，但是相对大锁性能较优。系统默认使用大锁,用
户可根据具体需要配置使用大锁还是小锁。

close #I2WARC
Signed-off-by: NHaryslee <lihao189@huawei.com>
Change-Id: I5612eeac1f65507160035eae16af61f285182eda

删除OsVmPhysFreeListAdd/OsVmPhysFreeListAddUnsafe、OsVmPhysFreeListDel/OsVmPhysFreeListDelUnsafe两对内部函数内容重复的部分。

close #I4FL95
Signed-off-by: Nkenneth <zhushangyuan@huawei.com>

support turn off as many features as possible.
current only libc and posix and bsd can not be turned off.
Signed-off-by: NCaoruihong <crh.cao@huawei.com>
Change-Id: I1e97570c67593207a56dc11f357eca4b4a018bfd

Change-Id: I052d930d54e63179b17b77f02c107a015f3cfc3f

Description:Delete VM to support only kernel mode.
Sig:liteos_a
Feature or Bugfix:Feature
Binary Source:No

Change-Id: Ie1029c8fbc0c1b85c138663933118d2d148b7769

Change-Id: Id7765f13d15014c8b19b75156b9f5971cbe99705

Change-Id: Ia6c1f6302407a707b3ec9b805f4c92d8a7970b86