[PATCH 0/2] blk-mq: merge bio into sw queue before plugging

[Ming Lei <ming.lei@redhat.com>]

Hi,

The 1st patch moves sw queue's bio merge before plugging, then
the sequential I/O performance regression by blk-mq can be fixed.

The 2nd patch makes the sw queue's bio merge as the default .bio_merge
if no io scheduler is used or the io scheduler doesn't provide
.bio_merge.

This post splits the orginal one into two patches to make diff easy-read
as suggested by Christoph.

Thanks,
Ming


Ming Lei (2):
  blk-mq: merge bio into sw queue before plugging
  blk-mq: make per-sw-queue bio merge as default .bio_merge

 block/blk-mq-sched.c | 62 ++++++++++++++++++++++++++++++++++++----
 block/blk-mq-sched.h |  4 +--
 block/blk-mq.c       | 80 +++++++---------------------------------------------
 3 files changed, 68 insertions(+), 78 deletions(-)

-- 
2.9.4