Only the root cpuset has cpuset.memory_pressure_enabled flag,
but not the only one.
Signed-off-by: NWanlong Gao <gaowanlong@cn.fujitsu.com>
Signed-off-by: NRandy Dunlap <rdunlap@xenotime.net>
Acked-by: NPaul Menage <menage@google.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>