[  414.843431] @init_rwsem:
[  414.843431]   before init_rwsem
[  414.843432]   after init_rwsem
[  414.843433]   after init_rwsem, count: 0
[  415.845248] @down_write:
[  415.845249]   before down_write
[  415.845250]   down_write acquired
[  415.846513] @down_read_trylock:
[  415.846514]   before down_read_trylock
[  415.846515]   down_read_trylock can not be acquired
[  415.846515] @down_read:
[  415.846516]   before down_read
[  416.846817] @up_write:
[  416.846819]   before up_write
[  416.846831]   after up_write
[  416.846857]   down_read acquired
[  416.846858] @up_read:
[  416.846859]   before up_read
[  416.846859]   after up_read
[  416.846859] @down_write_trylock:
[  416.846860]   before down_write_trylock
[  416.846860]  down_write_trylock be acquired
[  416.846861] @downgrade_write:
[  416.846861]   before downgrade_write
[  416.846861]   after downgrade_write
