linux-kernel - [PATCH RFC v2 0/6] blk-throttle: support enable and disable during runtime

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Date: Sat,  6 Apr 2024 16:00:53 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: axboe@...nel.dk,
	chenhuacai@...nel.org,
	tj@...nel.org,
	josef@...icpanda.com,
	jhs@...atatu.com,
	svenjoac@....de,
	raven@...maw.net,
	pctammela@...atatu.com,
	yukuai3@...wei.com,
	qde@...cy.de,
	zhaotianrui@...ngson.cn
Cc: linux-block@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	loongarch@...ts.linux.dev,
	cgroups@...r.kernel.org,
	yukuai1@...weicloud.com,
	yi.zhang@...wei.com,
	yangerkun@...wei.com
Subject: [PATCH RFC v2 0/6] blk-throttle: support enable and disable during runtime

From: Yu Kuai <yukuai3@...wei.com>

Hi, all!

I'm planning to support build all blk-throttle polices as kernel module,
this is the first part for blk-throttle:

- patch 1 remove THROTTLE LOW;
- patch 2 delay initialization from disk initialization to
configuration;
- patch 3-5 support to destroy blk-throttle is it's disabled;
- patch 6 switch blk-throttle to use rq_qos to stop exposing
blk-throttle internal implementations;

Changes from RFV v1:
 - add missing places in patch 1;
 - add patch 2-6;

Yu Kuai (6):
  blk-throttle: remove CONFIG_BLK_DEV_THROTTLING_LOW
  blk-throttle: delay initialization until configuration
  blk-throttle: expand tg_conf_updated() to return if any tg has rules
  blk-cgroup: add a new helper blkg_conf_exit_blkg()
  blk-throttle: support to destroy throtl_data when blk-throttle is
    disabled
  blk-throtl: switch to use rq_qos

 Documentation/ABI/stable/sysfs-block       |   12 -
 arch/loongarch/configs/loongson3_defconfig |    1 -
 block/Kconfig                              |   11 -
 block/bio.c                                |    1 -
 block/blk-cgroup.c                         |   25 +-
 block/blk-cgroup.h                         |    1 +
 block/blk-core.c                           |    4 +-
 block/blk-merge.c                          |    2 +-
 block/blk-mq-debugfs.c                     |    2 +
 block/blk-rq-qos.c                         |   13 +
 block/blk-rq-qos.h                         |   11 +
 block/blk-stat.c                           |    3 -
 block/blk-sysfs.c                          |    9 -
 block/blk-throttle.c                       | 1598 ++++++--------------
 block/blk-throttle.h                       |   76 +-
 block/blk.h                                |   11 -
 block/genhd.c                              |    3 -
 include/linux/blkdev.h                     |    4 -
 18 files changed, 495 insertions(+), 1292 deletions(-)

-- 
2.39.2