linux-kernel - [PATCH 0/6] some block optimisations

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Date:   Sat,  9 Oct 2021 13:25:37 +0100
From:   Pavel Begunkov <asml.silence@...il.com>
To:     Jens Axboe <axboe@...nel.dk>, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     asml.silence@...il.com
Subject: [PATCH 0/6] some block optimisations

On top of perf-wip branch,

./io_uring -d32 -s32 -c32 -b512 -p1 /dev/nullb0
~3.3 MIOPS vs 3.5 MIOPS, so gives around extra ~4-5%.

The main part is caching struct block_device + some inlining.

Pavel Begunkov (6):
  block: cache bdev in struct file for raw bdev IO
  block: inline BDEV_I and friends
  blk-mq: optimise *end_request non-stat path
  block: inline hot paths of blk_account_io_*()
  blk-mq: inline hot part of __blk_mq_sched_restart
  block: convert ->bd_inode to container_of()

 block/bdev.c           | 16 ----------------
 block/blk-core.c       | 30 +++++++++---------------------
 block/blk-mq-sched.c   |  4 +---
 block/blk-mq-sched.h   |  8 +++++++-
 block/blk-mq.c         |  9 ++++-----
 block/blk.h            | 24 +++++++++++++++++++++---
 block/fops.c           | 40 ++++++++++++++++++++++------------------
 include/linux/blkdev.h | 31 +++++++++++++++++++++++++------
 8 files changed, 89 insertions(+), 73 deletions(-)

-- 
2.33.0