linux-kernel - Re: [PATCH -next 1/8] block, bfq: cleanup bfq_weights

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Date:   Thu, 19 May 2022 12:59:35 +0200
From:   Jan Kara <jack@...e.cz>
To:     Yu Kuai <yukuai3@...wei.com>
Cc:     jack@...e.cz, paolo.valente@...aro.org, axboe@...nel.dk,
        tj@...nel.org, linux-block@...r.kernel.org,
        cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
        yi.zhang@...wei.com
Subject: Re: [PATCH -next 1/8] block, bfq: cleanup bfq_weights_tree
 add/remove apis

On Sat 14-05-22 17:05:15, Yu Kuai wrote:
> They already pass 'bfqd' as the first parameter, there is no need to
> pass 'bfqd->queue_weights_tree' as another parameter.
> 
> Signed-off-by: Yu Kuai <yukuai3@...wei.com>

Looks good. Just one nit below:

> @@ -945,12 +945,13 @@ void bfq_weights_tree_add(struct bfq_data *bfqd, struct bfq_queue *bfqq,
>   * about overhead.
>   */
>  void __bfq_weights_tree_remove(struct bfq_data *bfqd,
> -			       struct bfq_queue *bfqq,
> -			       struct rb_root_cached *root)
> +			       struct bfq_queue *bfqq)
>  {
> +	struct rb_root_cached *root;

Add empty line here please.

>  	if (!bfqq->weight_counter)
>  		return;
>  
> +	root = &bfqd->queue_weights_tree;
>  	bfqq->weight_counter->num_active--;
>  	if (bfqq->weight_counter->num_active > 0)
>  		goto reset_entity_pointer;

Otherwise the patch looks good. Feel free to add:

Reviewed-by: Jan Kara <jack@...e.cz>

								Honza

-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR