[PATCH BUGFIX/IMPROVEMENT 3/6] block, bfq: increase time window for waker detection

[Paolo Valente]

Tests on slower machines showed current window to be way too
small. This commit increases it.

Tested-by: Jan Kara <j...@suse.cz>
Signed-off-by: Paolo Valente <paolo.vale...@linaro.org>
---
 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 fdc5e163b2fe..43e2c39cf7b5 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -1931,7 +1931,7 @@ static void bfq_add_request(struct request *rq)
                if (bfqd->last_completed_rq_bfqq &&
                    !bfq_bfqq_has_short_ttime(bfqq) &&
                    ktime_get_ns() - bfqd->last_completion <
-                   200 * NSEC_PER_USEC) {
+                   4 * NSEC_PER_MSEC) {
                        if (bfqd->last_completed_rq_bfqq != bfqq &&
                            bfqd->last_completed_rq_bfqq !=
                            bfqq->waker_bfqq) {
-- 
2.20.1