mainline inclusion
from mainline-v5.13-rc1
commit a178015c
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I48N0H
CVE: NA

-------------------------------------------------

Now shrinker's nr_deferred is per memcg for memcg aware shrinkers, add
to parent's corresponding nr_deferred when memcg offline.

Link: https://lkml.kernel.org/r/20210311190845.9708-13-shy828301@gmail.comSigned-off-by: NYang Shi <shy828301@gmail.com>
Acked-by: NVlastimil Babka <vbabka@suse.cz>
Acked-by: NKirill Tkhai <ktkhai@virtuozzo.com>
Acked-by: NRoman Gushchin <guro@fb.com>
Reviewed-by: NShakeel Butt <shakeelb@google.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NChen Wandun <chenwandun@huawei.com>
Reviewed-by: NTong Tiangen <tongtiangen@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>