Re: [PATCH] block: propagate in_flight to whole disk on partition I/O

[Christoph Hellwig]

On Fri, May 22, 2026 at 07:37:51PM +0800, Tang Yizhou wrote:
> --- a/block/blk-core.c
> +++ b/block/blk-core.c
> @@ -1043,6 +1043,8 @@ unsigned long bdev_start_io_acct(struct block_device *bdev, enum req_op op,
>  	part_stat_lock();
>  	update_io_ticks(bdev, start_time, false);
>  	part_stat_local_inc(bdev, in_flight[op_is_write(op)]);
> +	if (bdev_is_partition(bdev))
> +		part_stat_local_inc(bdev_whole(bdev), in_flight[op_is_write(op)]);

overly lone line.

> +	if (bdev_is_partition(bdev))
> +		part_stat_local_dec(bdev_whole(bdev), in_flight[op_is_write(op)]);

Same.

>  }
> @@ -1144,6 +1147,9 @@ static inline void blk_account_io_start(struct request *req)
>  	part_stat_lock();
>  	update_io_ticks(req->part, jiffies, false);
>  	part_stat_local_inc(req->part, in_flight[op_is_write(req_op(req))]);
> +	if (bdev_is_partition(req->part))
> +		part_stat_local_inc(bdev_whole(req->part),
> +				    in_flight[op_is_write(req_op(req))]);

and tis duplicates the above logic.  Mabye factor the common code
into two little helpers?