Commit a3f9bce3 authored by Paolo Valente's avatar Paolo Valente Committed by Jens Axboe

block, bfq: bring forward seek&think time update

Until the base value for request service times gets finally computed
for a bfq_queue, the inject limit for that queue does depend on the
think-time state (short|long) of the queue. A timely update of the
think time then guarantees a quicker activation or deactivation of the
injection. Fortunately, the think time of a bfq_queue is updated in
the same code path as the inject limit; but after the inject limit.

This commits moves the update of the think time before the update of
the inject limit. For coherence, it moves the update of the seek time
too.
Reported-by: default avatarSrivatsa S. Bhat (VMware) <srivatsa@csail.mit.edu>
Tested-by: default avatarSrivatsa S. Bhat (VMware) <srivatsa@csail.mit.edu>
Signed-off-by: default avatarPaolo Valente <paolo.valente@linaro.org>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 24792ad0
......@@ -4979,19 +4979,9 @@ static void bfq_update_has_short_ttime(struct bfq_data *bfqd,
static void bfq_rq_enqueued(struct bfq_data *bfqd, struct bfq_queue *bfqq,
struct request *rq)
{
struct bfq_io_cq *bic = RQ_BIC(rq);
if (rq->cmd_flags & REQ_META)
bfqq->meta_pending++;
bfq_update_io_thinktime(bfqd, bfqq);
bfq_update_has_short_ttime(bfqd, bfqq, bic);
bfq_update_io_seektime(bfqd, bfqq, rq);
bfq_log_bfqq(bfqd, bfqq,
"rq_enqueued: has_short_ttime=%d (seeky %d)",
bfq_bfqq_has_short_ttime(bfqq), BFQQ_SEEKY(bfqq));
bfqq->last_request_pos = blk_rq_pos(rq) + blk_rq_sectors(rq);
if (bfqq == bfqd->in_service_queue && bfq_bfqq_wait_request(bfqq)) {
......@@ -5079,6 +5069,10 @@ static bool __bfq_insert_request(struct bfq_data *bfqd, struct request *rq)
bfqq = new_bfqq;
}
bfq_update_io_thinktime(bfqd, bfqq);
bfq_update_has_short_ttime(bfqd, bfqq, RQ_BIC(rq));
bfq_update_io_seektime(bfqd, bfqq, rq);
waiting = bfqq && bfq_bfqq_wait_request(bfqq);
bfq_add_request(rq);
idle_timer_disabled = waiting && !bfq_bfqq_wait_request(bfqq);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment