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From:   Changheun Lee <nanich.lee@samsung.com>
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Subject: [PATCH v11 0/3] bio: control bio max size
Date:   Wed,  2 Jun 2021 21:10:34 +0900
Message-Id: <20210602121037.11083-1-nanich.lee@samsung.com>
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References: <CGME20210602122909epcas1p4f4cad512dd31ed9458ca6049c5074b71@epcas1p4.samsung.com>
Precedence: bulk

bio size can grow up to 4GB after muli-page bvec has been enabled.
But sometimes large size of bio would lead to inefficient behaviors.
Control of bio max size will be helpful to improve inefficiency.

blk_queue_max_bio_bytes() is added to enable be set the max_bio_bytes in
each driver layer. And max_bio_bytes sysfs is added to show current
max_bio_bytes for each request queue.
bio size can be controlled via max_bio_bytes.

Changheun Lee (3):
  bio: control bio max size
  blk-sysfs: add max_bio_bytes
  scsi: set max_bio_bytes with queue max sectors

 Documentation/ABI/testing/sysfs-block | 10 ++++++++++
 Documentation/block/queue-sysfs.rst   |  7 +++++++
 block/bio.c                           | 17 ++++++++++++++---
 block/blk-settings.c                  | 19 +++++++++++++++++++
 block/blk-sysfs.c                     |  7 +++++++
 drivers/scsi/scsi_lib.c               |  2 ++
 include/linux/bio.h                   |  4 +++-
 include/linux/blkdev.h                |  3 +++
 8 files changed, 65 insertions(+), 4 deletions(-)

-- 
2.29.0