diff options
| author | Yu Kuai <yukuai@fygo.io> | 2026-06-08 11:42:43 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2026-06-24 06:37:54 -0600 |
| commit | 0af3fedb8c8ed3c07b4f76927bd7fc88f6f82efb (patch) | |
| tree | 5c873888adb905f7685ddd3dd040bbba202732dc /include/linux | |
| parent | 25656304dabd26198ec69460c594a19d086ef099 (diff) | |
blk-cgroup: delay freeing policy data after rcu grace period
Currently blkcg_print_blkgs() must hold RCU to iterate blkgs from a
blkcg, and prfill() must hold queue_lock to prevent policy data from
being freed by policy deactivation. As a consequence, queue_lock has to
be nested under RCU from blkcg_print_blkgs().
Delay freeing policy data until after an RCU grace period so prfill() can
be protected by RCU alone.
Signed-off-by: Yu Kuai <yukuai@fygo.io>
Link: https://patch.msgid.link/e20e5d984b41a026d61851966bed35eb094c4bff.1780621988.git.yukuai@fygo.io
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux')
0 files changed, 0 insertions, 0 deletions