linux-kernel - [PATCH v2 for-6.18/block 00/10] blk-mq: cleanup and fixes for updating nr

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Message-Id: <20250910080445.239096-1-yukuai1@huaweicloud.com>
Date: Wed, 10 Sep 2025 16:04:35 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: axboe@...nel.dk,
	nilay@...ux.ibm.com,
	ming.lei@...hat.com
Cc: linux-block@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	yukuai3@...wei.com,
	yi.zhang@...wei.com,
	yangerkun@...wei.com,
	johnny.chenyi@...wei.com
Subject: [PATCH v2 for-6.18/block 00/10] blk-mq: cleanup and fixes for updating nr_requests

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

Changes from v1:
 - add comments explaining accessing q->elevator without holding
   elevator_lock in patch 4;
 - add non-shared checking in patch 8;
 - add review tag by Nilay, patch 1-5,7,9,10;

Yu Kuai (10):
  blk-mq: remove useless checking in queue_requests_store()
  blk-mq: remove useless checkings in blk_mq_update_nr_requests()
  blk-mq: check invalid nr_requests in queue_requests_store()
  blk-mq: convert to serialize updating nr_requests with
    update_nr_hwq_lock
  blk-mq: cleanup shared tags case in blk_mq_update_nr_requests()
  blk-mq: split bitmap grow and resize case in
    blk_mq_update_nr_requests()
  blk-mq-sched: add new parameter nr_requests in
    blk_mq_alloc_sched_tags()
  blk-mq: fix potential deadlock while nr_requests grown
  blk-mq: remove blk_mq_tag_update_depth()
  blk-mq: fix stale nr_requests documentation

 Documentation/ABI/stable/sysfs-block | 14 ++----
 block/blk-mq-sched.c                 | 14 ++----
 block/blk-mq-sched.h                 |  2 +-
 block/blk-mq-tag.c                   | 53 ---------------------
 block/blk-mq.c                       | 71 ++++++++++++++--------------
 block/blk-mq.h                       | 18 +++++--
 block/blk-sysfs.c                    | 60 ++++++++++++++++++-----
 block/elevator.c                     |  3 +-
 8 files changed, 112 insertions(+), 123 deletions(-)

-- 
2.39.2