bfq_rq_enqueued

Name:Called when a new fs request (rq) is added to bfqq. Check if there's* something we should do about it.

Proto:static void bfq_rq_enqueued(struct bfq_data *bfqd, struct bfq_queue *bfqq, struct request *rq)

Type:void

Parameter:

Type	Parameter	Name
struct bfq_data *	bfqd
struct bfq_queue *	bfqq
struct request *	rq

5352

If op and common flags & REQ_META Then umber of pending metadata requests ++

5355

position of the last request enqueued = lk_rq_pos() : the current sector* blk_rq_bytes() : bytes left in the entire request* blk_rq_cur_bytes() : bytes left in the current segment* blk_rq_err_bytes() : bytes left till the next error boundary* blk_rq_sectors() : sectors left in the entire + blk_rq_sectors(rq)

5357

If bfqq == bfq_queue in service && bfq_bfqq_wait_request(bfqq) Then

5358

small_req = umber of sync and async requests queued [rq_is_sync(rq)] == 1 && blk_rq_sectors(rq) < 32

5360

budget_timeout = Budget timeout is not implemented through a dedicated timer, but* just checked on request arrivals and completions, as well as on* idle timer expirations.

5378

If small_req && idling_boosts_thr_without_issues(bfqd, bfqq) && Not budget_timeout Then Return

5389

bfq_clear_bfqq_wait_request(bfqq)

5390

hrtimer_try_to_cancel - try to deactivate a timer*@timer: hrtimer to stop* Returns:* * 0 when the timer was not active* * 1 when the timer was active* * -1 when the timer is currently executing the callback function and* cannot be stopped

5399

If budget_timeout Then q_bfqq_expire - expire a queue.*@bfqd: device owning the queue.*@bfqq: the queue to expire.*@compensate: if true, compensate for the time spent idling.*@reason: the reason causing the expiration.* If the process associated with bfqq does slow I/O (e

**Caller**
Name	Describe
__bfq_insert_request	rns true if it causes the idle timer to be disabled

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