On Mon, Jan 21, 2019 at 01:43:21AM -0800, Sagi Grimberg wrote:

quoted

V14:
	- drop patch(patch 4 in V13) for renaming bvec helpers, as suggested by Jens
	- use mp_bvec_* as multi-page bvec helper name
	- fix one build issue, which is caused by missing one converion of
	bio_for_each_segment_all in fs/gfs2
	- fix one 32bit ARCH specific issue caused by segment boundary mask
	overflow

Hey Ming,

So is nvme-tcp also affected here? The only point where I see nvme-tcp
can be affected is when initializing a bvec iter using bio_segments() as
everywhere else we use iters which should transparently work..

I see that loop was converted, does it mean that nvme-tcp needs to
call something like?
--
	bio_for_each_mp_bvec(bv, bio, iter)
		nr_bvecs++;

bio_for_each_segment()/bio_segments() still works, just not as efficient
as bio_for_each_mp_bvec() given each multi-page bvec(very similar with scatterlist)
is returned in each loop.

I don't look at nvme-tcp code yet. But if nvme-tcp supports this way,
it can benefit from bio_for_each_mp_bvec().

Thanks,
Ming