2022-01-04 14:56 GMT+09:00, Hyunchul Lee <hyc.lee@xxxxxxxxx>: > if CONFIG_LOCKDEP is enabled, the following > kernel warning message is generated because > rdma_accept() checks whehter the handler_mutex > is held by lockdep_assert_held. CM(Connection > Manager) holds the mutex before CM handler > callback is called. > > [ 63.211405 ] WARNING: CPU: 1 PID: 345 at > drivers/infiniband/core/cma.c:4405 rdma_accept+0x17a/0x350 > [ 63.212080 ] RIP: 0010:rdma_accept+0x17a/0x350 > ... > [ 63.214036 ] Call Trace: > [ 63.214098 ] <TASK> > [ 63.214185 ] smb_direct_accept_client+0xb4/0x170 [ksmbd] > [ 63.214412 ] smb_direct_prepare+0x322/0x8c0 [ksmbd] > [ 63.214555 ] ? rcu_read_lock_sched_held+0x3a/0x70 > [ 63.214700 ] ksmbd_conn_handler_loop+0x63/0x270 [ksmbd] > [ 63.214826 ] ? ksmbd_conn_alive+0x80/0x80 [ksmbd] > [ 63.214952 ] kthread+0x171/0x1a0 > [ 63.215039 ] ? set_kthread_struct+0x40/0x40 > [ 63.215128 ] ret_from_fork+0x22/0x30 > > To avoid this, move creating a queue pair and accepting > a client from transport_ops->prepare() to > smb_direct_handle_connect_request(). > > Signed-off-by: Hyunchul Lee <hyc.lee@xxxxxxxxx> Acked-by: Namjae Jeon <linkinjeon@xxxxxxxxxx>
