linux-kernel - Re: [PATCH] [v3] blk-mq: add cond_resched() in __blk_mq_alloc_rq

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Date:   Fri, 25 Sep 2020 21:07:22 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Xianting Tian <tian.xianting@....com>, axboe@...nel.dk
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [v3] blk-mq: add cond_resched() in
 __blk_mq_alloc_rq_maps()

On 2020-09-25 19:39, Xianting Tian wrote:
> diff --git a/block/blk-mq.c b/block/blk-mq.c
> index b3d2785ee..62d152d03 100644
> --- a/block/blk-mq.c
> +++ b/block/blk-mq.c
> @@ -3256,9 +3256,11 @@ static int __blk_mq_alloc_rq_maps(struct blk_mq_tag_set *set)
>  {
>  	int i;
>  
> -	for (i = 0; i < set->nr_hw_queues; i++)
> +	for (i = 0; i < set->nr_hw_queues; i++) {
>  		if (!__blk_mq_alloc_map_and_request(set, i))
>  			goto out_unwind;
> +		cond_resched();
> +	}
>  
>  	return 0;

Reviewed-by: Bart Van Assche <bvanassche@....org>