On Fri, 2017-08-04 at 09:04 -0600, Jens Axboe wrote: > +static void blk_mq_check_inflight(struct blk_mq_hw_ctx *hctx, > + struct request *rq, void *priv, > + bool reserved) > +{ > + struct mq_inflight *mi = priv; > + > + if (!test_bit(REQ_ATOM_STARTED, &rq->atomic_flags)) > + return; > + > + /* > + * Count as inflight if it either matches the partition we asked > + * for, or if it's the root > + */ > + if (rq->part == mi->part || mi->part->partno) > + mi->inflight[0]++; > +} Hello Jens, How to check for the root? Does partno == 0 or partno != 0 represent the root? Please note that I'm not familiar with the partition code. Thanks, Bart.