Re: [PATCH v4 06/11] md/raid5: get rid of bio_fits_rdev()

[Christoph Hellwig <hch@lst.de>]

On Mon, May 25, 2015 at 05:54:14PM +1000, NeilBrown wrote:
> Did I write that?  I guess I did :-(
> I meant *after*.   Don't get rid of bio_fits_rdev until split_bio is in
> chunk_aligned_read().

I suspect the whole series could use some reordering.

patch 1:

 add ->bio_split and blk_queue_split

patch 2..n:

 one for each non-trivial driver that implements ->merge_bvec_fn to
 remove it and instead split bios in ->make_request.  The md patch
 to do the right thing in chunk_aligned_read goes into the general
 md patch here.  The bcache patch also goes into this series.

patch n+1:

 - add blk_queue_split calls for remaining trivial drivers

patch n+2:

 - remove ->merge_bvec_fn and checking of max_sectors a for all
   drivers, simplify bio_add_page

patch n+2:

 - remove splitting in blkdev_issue_discard

patch n+3

 - remove bio_fits_rdev

patch n+4

 - remove bio_get_nr_vecs

patch n+4

 - use bio_add_page

patch n+5

 - update documentation