From: Paolo Valente Date: Thu, 22 Aug 2019 15:20:36 +0000 (+0200) Subject: block, bfq: increase update frequency of inject limit X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=17c3d2660268501d36b75c7c7083dc8f2bbb93c3;p=linux.git block, bfq: increase update frequency of inject limit The update period of the injection limit has been tentatively set to 100 ms, to reduce fluctuations. This value however proved to cause, occasionally, the limit to be decremented for some bfq_queue only after the queue underwent excessive injection for a lot of time. This commit reduces the period to 10 ms. Tested-by: Oleksandr Natalenko Signed-off-by: Paolo Valente Signed-off-by: Jens Axboe --- diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c index e114282204f66..ddac93e910fa1 100644 --- a/block/bfq-iosched.c +++ b/block/bfq-iosched.c @@ -2016,7 +2016,7 @@ static void bfq_add_request(struct request *rq) (bfqq->last_serv_time_ns > 0 && bfqd->rqs_injected && bfqd->rq_in_driver > 0)) && time_is_before_eq_jiffies(bfqq->decrease_time_jif + - msecs_to_jiffies(100))) { + msecs_to_jiffies(10))) { bfqd->last_empty_occupied_ns = ktime_get_ns(); /* * Start the state machine for measuring the