Re: [dm-devel] [PATCH v5 01/12] block: Generalized bio pool freeing

[Tejun Heo <tj kernel org>]

On Mon, Aug 06, 2012 at 03:08:30PM -0700, Kent Overstreet wrote:
> @@ -422,7 +409,11 @@ void bio_put(struct bio *bio)
>  	if (atomic_dec_and_test(&bio->bi_cnt)) {
>  		bio_disassociate_task(bio);
>  		bio->bi_next = NULL;
> -		bio->bi_destructor(bio);
> +
> +		if (bio->bi_pool)
> +			bio_free(bio, bio->bi_pool);
> +		else
> +			bio->bi_destructor(bio);

So, this bi_pool overriding caller specified custom bi_destructor is
rather unusual.  I know why it's like that - the patch series is
gradually replacing bi_destructor with bi_pool and removes
bi_destructor eventually, but it would be far better if at least patch
description says why this is unusual like this.

Thanks.

-- 
tejun