[  417.890631] #down:
[  417.890633]   prepare down
[  417.890634]   prepare down,acquired
[  417.891475] @down_trylock:
[  417.891476]   before down_trylock
[  417.891476]   down_trylock can not be acquired
[  417.891477] @down:
[  417.891477]   before down
[  418.892266] @up:
[  418.892267]   before up
[  418.892282]   after up
[  418.892311] #down:
[  418.892311]   prepare down
[  418.892318]   down acquired
[  418.892341]   prepare down,acquired
[  418.893217] #down_trylock:
[  418.893217]   before down_trylock
[  418.893218]   down_trylock can not be acquired
[  418.893218] @down_interruptible:
[  418.893218]   before down_interruptible
[  419.893536] #up:
[  419.893537]   before up
[  419.893552]   after up
[  419.893579]   down_interruptible acquired
