mm: memcontrol: do not account memory+swap on unified hierarchy
The unified hierarchy memory controller doesn't expose the memory+swap counter to userspace, but its accounting is hardcoded in all charge paths right now, including the per-cpu charge cache ("the stock"). To avoid adding yet more pointless memory+swap accounting with the socket memory support in unified hierarchy, disable the counter altogether when in unified hierarchy mode. Signed-off-by:Johannes Weiner <hannes@cmpxchg.org> Acked-by:
Michal Hocko <mhocko@suse.com> Reviewed-by:
Vladimir Davydov <vdavydov@virtuozzo.com> Acked-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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