[PATCH 1/2] block: accumulate segment page gaps per bio

[Christoph Hellwig]

> index 0a29b20939d17..d0ed28d40fe02 100644
> --- a/include/linux/blk_types.h
> +++ b/include/linux/blk_types.h
> @@ -264,6 +264,8 @@ struct bio {
>  
>  	unsigned short		bi_max_vecs;	/* max bvl_vecs we can hold */
>  
> +	unsigned int		page_gaps;	/* a mask of all the vector gaps */

Bloating the bio for the gaps, especially as the bio is otherwise not
built to hardware limits at all seems like an odd tradeoff.