Block io operation completed by device driver
void trace_block_rq_complete(struct request_queue * q, struct request * rq, unsigned int nr_bytes);
q
queue containing the block operation request
rq
block operations request
nr_bytes
number of completed bytes
The block_rq_complete tracepoint event indicates that some portion of operation request has been completed by the device driver. If the rq->bio is NULL, then there is absolutely no additional work to do for the request. If rq->bio is non-NULL then there is additional work required to complete the request.