add /proc/fs_cache to display vnode, path cache, page cache.
also change some bad virable name
close: #I3WESD
Signed-off-by: mucor <mucorwang@gmail.com>
support turn off as many features as possible.
current only libc and posix and bsd can not be turned off.
Signed-off-by: Caoruihong <crh.cao@huawei.com>
Change-Id: I1e97570c67593207a56dc11f357eca4b4a018bfd