| From: |
| Yu Kuai <yukuai1-AT-huaweicloud.com> |
| To: |
| tj-AT-kernel.org, ming.lei-AT-redhat.com, nilay-AT-linux.ibm.com, hch-AT-lst.de, josef-AT-toxicpanda.com, axboe-AT-kernel.dk, akpm-AT-linux-foundation.org, vgoyal-AT-redhat.com |
| Subject: |
| [PATCH 00/10] blk-cgroup: don't use queue_lock for protection and fix deadlock |
| Date: |
| Thu, 25 Sep 2025 16:15:15 +0800 |
| Message-ID: |
| <20250925081525.700639-1-yukuai1@huaweicloud.com> |
| Cc: |
| cgroups-AT-vger.kernel.org, linux-block-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org, linux-mm-AT-kvack.org, yukuai3-AT-huawei.com, yukuai1-AT-huaweicloud.com, yi.zhang-AT-huawei.com, yangerkun-AT-huawei.com, johnny.chenyi-AT-huawei.com |
| Archive-link: |
| Article |
From: Yu Kuai <yukuai3@huawei.com>
patch 1-6 is prep patches to make sure queue_lock is not nested under
rcu and other spinlocks in blk-cgroup;
patch 7 convert blk-cgroup to use blkcg_mutex to protect blkgs;
patch 8-9 are follow cleanups;
patch 10 fix deadlock in blk-throttle;
BTW, with this set, we can unify blkg_conf_prep() and other related
helpers.
Yu Kuai (10):
blk-cgroup: use cgroup lock and rcu to protect iterating blkcg blkgs
blk-cgroup: don't nest queue_lock under rcu in blkg_lookup_create()
blk-cgroup: don't nest queu_lock under rcu in bio_associate_blkg()
blk-cgroup: don't nest queue_lock under blkcg->lock in
blkcg_destroy_blkgs()
mm/page_io: don't nest queue_lock under rcu in
bio_associate_blkg_from_page()
block, bfq: don't grab queue_lock to initialize bfq
blk-cgroup: convert to protect blkgs with blkcg_mutex
blk-cgroup: remove radix_tree_preload()
blk-cgroup: remove preallocate blkg for blkg_create()
blk-throttle: fix possible deadlock due to queue_lock in timer
block/bfq-cgroup.c | 6 +-
block/bfq-iosched.c | 13 +-
block/blk-cgroup-rwstat.c | 2 -
block/blk-cgroup.c | 329 ++++++++++++++++----------------------
block/blk-cgroup.h | 6 +-
block/blk-throttle.c | 31 ++--
mm/page_io.c | 7 +-
7 files changed, 163 insertions(+), 231 deletions(-)
--
2.39.2
