blk_mq_sched_alloc_tags

Name:blk_mq_sched_alloc_tags

Proto:static int blk_mq_sched_alloc_tags(struct request_queue *q, struct blk_mq_hw_ctx *hctx, unsigned int hctx_idx)

Type:int

Parameter:

Type	Parameter	Name
struct request_queue *	q
struct blk_mq_hw_ctx *	hctx
unsigned int	hctx_idx

464

467

@sched_tags: Tags owned by I/O scheduler. If there is an I/O* scheduler associated with a request queue, a tag is assigned when* that request is allocated. Else, this member is not used. = blk_mq_alloc_rq_map(set, hctx_idx, Max # of requests , reserved_tags)

469

If Not @sched_tags: Tags owned by I/O scheduler. If there is an I/O* scheduler associated with a request queue, a tag is assigned when* that request is allocated. Else, this member is not used. Then Return -ENOMEM

472

ret = blk_mq_alloc_rqs(set, @sched_tags: Tags owned by I/O scheduler. If there is an I/O* scheduler associated with a request queue, a tag is assigned when* that request is allocated. Else, this member is not used., hctx_idx, Max # of requests )

473

If ret Then blk_mq_sched_free_tags(set, hctx, hctx_idx)

476

Return ret

**Caller**
Name	Describe
blk_mq_init_sched

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