On Fri 23-12-22 03:16:40, Kemeng Shi wrote:
> bfqd->bfq_wr_max_time is set to 0 in bfq_init_queue and is never changed.
> It is only used in bfq_wr_duration when bfq_wr_max_time > 0 which never
> meets, so bfqd->bfq_wr_max_time is not used actually. Just remove it.
>
> Signed-off-by: Kemeng Shi <shikemeng@xxxxxxxxxxxxxxx>
Nice catch. Feel free to add:
Reviewed-by: Jan Kara <jack@xxxxxxx>
Honza
> ---
> block/bfq-iosched.c | 4 ----
> block/bfq-iosched.h | 2 --
> 2 files changed, 6 deletions(-)
>
> diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
> index 195cdc6be087..91bc68fba72d 100644
> --- a/block/bfq-iosched.c
> +++ b/block/bfq-iosched.c
> @@ -1068,9 +1068,6 @@ static unsigned int bfq_wr_duration(struct bfq_data *bfqd)
> {
> u64 dur;
>
> - if (bfqd->bfq_wr_max_time > 0)
> - return bfqd->bfq_wr_max_time;
> -
> dur = bfqd->rate_dur_prod;
> do_div(dur, bfqd->peak_rate);
>
> @@ -7079,7 +7076,6 @@ static int bfq_init_queue(struct request_queue *q, struct elevator_type *e)
> */
> bfqd->bfq_wr_coeff = 30;
> bfqd->bfq_wr_rt_max_time = msecs_to_jiffies(300);
> - bfqd->bfq_wr_max_time = 0;
> bfqd->bfq_wr_min_idle_time = msecs_to_jiffies(2000);
> bfqd->bfq_wr_min_inter_arr_async = msecs_to_jiffies(500);
> bfqd->bfq_wr_max_softrt_rate = 7000; /*
> diff --git a/block/bfq-iosched.h b/block/bfq-iosched.h
> index 9fa89577322d..0b1a5438046a 100644
> --- a/block/bfq-iosched.h
> +++ b/block/bfq-iosched.h
> @@ -719,8 +719,6 @@ struct bfq_data {
> * is multiplied.
> */
> unsigned int bfq_wr_coeff;
> - /* maximum duration of a weight-raising period (jiffies) */
> - unsigned int bfq_wr_max_time;
>
> /* Maximum weight-raising duration for soft real-time processes */
> unsigned int bfq_wr_rt_max_time;
> --
> 2.30.0
>
--
Jan Kara <jack@xxxxxxxx>
SUSE Labs, CR
