memcg: fix documentation
Bharata B Rao authored

The description about various statistics from memory.stat is not accurate
and confusing at times.

Correct this along with a few other minor cleanups.
Signed-off-by: default avatarBharata B Rao <bharata@linux.vnet.ibm.com>
Acked-by: default avatarBalbir Singh <balbir@linux.vnet.ibm.com>
Acked-by: default avatarKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
c863d835