linux-kernel - [PATCH v12 0/3] bio: control bio max size

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Date:   Fri,  4 Jun 2021 14:03:21 +0900
From:   Changheun Lee <nanich.lee@...sung.com>
To:     Johannes.Thumshirn@....com, alex_y_xu@...oo.ca,
        asml.silence@...il.com, axboe@...nel.dk, bgoncalv@...hat.com,
        jejb@...ux.ibm.com, martin.petersen@...cle.com,
        cang@...eaurora.org, avri.altman@....com, alim.akhtar@...sung.com,
        bvanassche@....org, damien.lemoal@....com,
        gregkh@...uxfoundation.org, hch@...radead.org, jaegeuk@...nel.org,
        linux-block@...r.kernel.org, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org, ming.lei@...hat.com, osandov@...com,
        patchwork-bot@...nel.org, tj@...nel.org, tom.leiming@...il.com,
        yi.zhang@...hat.com
Cc:     jisoo2146.oh@...sung.com, junho89.kim@...sung.com,
        mj0123.lee@...sung.com, seunghwan.hyun@...sung.com,
        sookwan7.kim@...sung.com, woosung2.lee@...sung.com,
        yt0928.kim@...sung.com, Changheun Lee <nanich.lee@...sung.com>
Subject: [PATCH v12 0/3] bio: control bio max size

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
  ufs: 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/ufs/ufshcd.c             |  5 +++++
 include/linux/bio.h                   |  4 +++-
 include/linux/blkdev.h                |  3 +++
 8 files changed, 68 insertions(+), 4 deletions(-)

-- 
2.29.0