wbt_wait

Name:Returns true if the IO request should be accounted, false if not.* May sleep, if we have exceeded the writeback limits. Caller can pass* in an irq held spinlock, if it holds one when calling this function.* If we do sleep, we'll release and re-grab it.

Proto:static void wbt_wait(struct rq_qos *rqos, struct bio *bio)

Type:void

Parameter:

Type	Parameter	Name
struct rq_qos *	rqos
struct bio *	bio

581

rwb = RQWB(rqos)

584

flags = bio_to_wbt_flags(rwb, bio)

585

If Not (flags & write, tracked for throttling ) Then

586

If flags & read Then wb_timestamp(rwb, & last non-throttled issue )

588

Return

591

Block if we will exceed our limit, or if we are currently waiting for* the timer to kick off queuing again.

593

If Not lk_stat_is_active() - Check if a block statistics callback is currently* gathering statistics.*@cb: The callback. Then rwb_arm_timer(rwb)

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