From 17c3d2660268501d36b75c7c7083dc8f2bbb93c3 Mon Sep 17 00:00:00 2001 From: Paolo Valente Date: Thu, 22 Aug 2019 17:20:36 +0200 Subject: 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 --- block/bfq-iosched.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c index e114282204f6..ddac93e910fa 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 -- cgit