[Drbd-dev] [PATCH v5 01/11] block: make generic_make_request handle arbitrarily sized bios

[Christoph Hellwig]

On Sun, Aug 02, 2015 at 10:58:22PM -0700, Ming Lin wrote:
> I think the important thing is the late splitting for regular bio.
> For discard/write_same bio, how about just don't do late splitting?

I'd hate having to special case them even more.  Especially as the
discard splitting is nasty and we really don't want to send giant
discards by default anyway (see Jens' patches to limit discard size
by default).

So I'd recommend to keep everything as-is, just make sure we don't
overflow bi_size.