[  109.688687][  T111] su (111) used greatest stack depth: 24104 bytes left
[  109.688709][  T111] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:322
[  109.688712][  T111] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 111, name: su
[  109.688713][  T111] preempt_count: 2, expected: 0
[  109.688714][  T111] RCU nest depth: 0, expected: 0
[  109.688715][  T111] locks held by su/111: 5, last CPU#2:
[  109.688717][  T111]  #0: ffffffff9c2027b8 (low_water_lock){+.+.}-{3:3}, at: d