On Thu, Aug 17, 2023 at 10:17:51PM +0800, Ming Lei wrote:
> When blkg is removed from q->blkg_list from blkg_free_workfn(), queue_lock
> has to be held, otherwise, all kinds of bugs(list corruption, hard lockup,
> ..) can be triggered from blkg_destroy_all().
>
> Fixes: f1c006f1c685 ("blk-cgroup: synchronize pd_free_fn() from blkg_free_workfn() and blkcg_deactivate_policy()")
> Cc: Yu Kuai <yukuai3@xxxxxxxxxx>
> Cc: xiaoli feng <xifeng@xxxxxxxxxx>
> Cc: Chunyu Hu <chuhu@xxxxxxxxxx>
> Cc: Mike Snitzer <snitzer@xxxxxxxxxx>
> Cc: Tejun Heo <tj@xxxxxxxxxx>
> Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx>
Acked-by: Tejun Heo <tj@xxxxxxxxxx>
Thanks.
--
tejun
