diff options
| author |   Paolo Valente <paolo.valente@linaro.org> | 2019-08-22 17:20:37 +0200 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2019-09-17 20:03:49 -0600 |
| commit | 58494c980f40274c465ebfdece02d401def088bf (patch) | |
| tree | 16500553ac438b09d4524e54ef069bfadbb03b27 /block | |
| parent | block, bfq: increase update frequency of inject limit (diff) | |
| download | linux-dev-58494c980f40274c465ebfdece02d401def088bf.tar.xz linux-dev-58494c980f40274c465ebfdece02d401def088bf.zip | |
block, bfq: push up injection only after setting service time
If equal to 0, the injection limit for a bfq_queue is pushed to 1
after a first sample of the total service time of the I/O requests of
the queue is computed (to allow injection to start). Yet, because of a
mistake in the branch that performs this action, the push may happen
also in some other case. This commit fixes this issue.
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
| -rw-r--r-- | block/bfq-iosched.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c index ddac93e910fa..0319d6339822 100644 --- a/block/bfq-iosched.c +++ b/block/bfq-iosched.c @@ -5823,12 +5823,14 @@ static void bfq_update_inject_limit(struct bfq_data *bfqd, */ if ((bfqq->last_serv_time_ns == 0 && bfqd->rq_in_driver == 1) || tot_time_ns < bfqq->last_serv_time_ns) { + if (bfqq->last_serv_time_ns == 0) { + /* + * Now we certainly have a base value: make sure we + * start trying injection. + */ + bfqq->inject_limit = max_t(unsigned int, 1, old_limit); + } bfqq->last_serv_time_ns = tot_time_ns; - /* - * Now we certainly have a base value: make sure we - * start trying injection. - */ - bfqq->inject_limit = max_t(unsigned int, 1, old_limit); } else if (!bfqd->rqs_injected && bfqd->rq_in_driver == 1) /* * No I/O injected and no request still in service in |