bcachefs: Use BTREE_ITER_PREFETCH in journal+btree iter

Introducing the journal+btree iter introduced a regression where we
stopped using BTREE_ITER_PREFETCH - this is a performance regression on
rotating disks.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2020-12-01 11:40:59 -05:00 • committed by Kent Overstreet
commit 2e9f3b8885