[PATCH V3 1/8] memcg: remove MEMCG_NR_FILE_MAPPED

From: Sha Zhengju While accounting memcg page stat, it's not worth to use MEMCG_NR_FILE_MAPPED as an extra layer of indirection because of the complexity and presumed performance overhead. We can use MEM_CGROUP_STAT_FILE_MAPPED directly. Signed-off-by: Sha Zhengju Acked-by: KAMEZAWA Hiroyuki

[PATCH V3 1/8] memcg: remove MEMCG_NR_FILE_MAPPED

From: Sha Zhengju handai@taobao.com While accounting memcg page stat, it's not worth to use MEMCG_NR_FILE_MAPPED as an extra layer of indirection because of the complexity and presumed performance overhead. We can use MEM_CGROUP_STAT_FILE_MAPPED directly. Signed-off-by: Sha Zhengju