On Sat, 10 Jun 2023 07:42:49 +0800, Ming Lei wrote:
> As noted by Michal, the blkg_iostat_set's in the lockless list hold
> reference to blkg's to protect against their removal. Those blkg's
> hold reference to blkcg. When a cgroup is being destroyed,
> cgroup_rstat_flush() is only called at css_release_work_fn() which
> is called when the blkcg reference count reaches 0. This circular
> dependency will prevent blkcg and some blkgs from being freed after
> they are made offline.
>
> [...]
Applied, thanks!
[1/1] blk-cgroup: Flush stats before releasing blkcg_gq
commit: 20cb1c2fb7568a6054c55defe044311397e01ddb
Best regards,
--
Jens Axboe
