On Wed, Jan 26, 2022 at 10:51:53AM -0800, Yang Shi wrote: > + __entry->dev = rq->q->disk ? disk_devt(rq->q->disk) : 0; > + __assign_str(name, rq->q->disk ? rq->q->disk->disk_name : "?"); None f the other tracepoints has the disk name, why does this one need it? And if you add it please avoid the overly long line. > + __entry->sector = blk_rq_pos(rq); > + __entry->nr_sector = nr_bytes >> 9; > + __entry->error = blk_status_to_errno(error); This still converts the block status to an errno.