blk_mq_hctx_next

Name:It'd be great if the workqueue API had a way to pass* in a mask and had some smarts for more clever placement.* For now we just round-robin here, switching for every* BLK_MQ_CPU_WORK_BATCH queued items.

Proto:static int blk_mq_hctx_next_cpu(struct blk_mq_hw_ctx *hctx)

Type:int

Parameter:

Type	Parameter	Name
struct blk_mq_hw_ctx *	hctx

1389

bool tried = false

1390

next_cpu = @next_cpu: Used by blk_mq_hctx_next_cpu() for round-robin CPU* selection from @cpumask.

1392

If nr_hw_queues == 1 Then Return WORK_CPU_UNBOUND

1395

If --@next_cpu_batch: Counter of how many works left in the batch before* changing to the next CPU. <= 0 Then

1396

select_cpu :

1397

next_cpu = cpumask_next_and(next_cpu, @cpumask: Map of available CPUs where this hctx can run. , cpu_online_mask)

1399

If next_cpu >= Setup number of possible processor ids Then next_cpu = blk_mq_first_mapped_cpu(hctx)

1401

@next_cpu_batch: Counter of how many works left in the batch before* changing to the next CPU. = BLK_MQ_CPU_WORK_BATCH

1408

If Not cpu_online(next_cpu) Then

1409

If Not tried Then

1410

tried = true

1411

Go to select_cpu

1418

@next_cpu: Used by blk_mq_hctx_next_cpu() for round-robin CPU* selection from @cpumask. = next_cpu

1419

@next_cpu_batch: Counter of how many works left in the batch before* changing to the next CPU. = 1

1420

Return WORK_CPU_UNBOUND

1423

@next_cpu: Used by blk_mq_hctx_next_cpu() for round-robin CPU* selection from @cpumask. = next_cpu

1424

Return next_cpu

**Caller**
Name	Describe
__blk_mq_delay_run_hw_queue

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