On Wed, 08 Feb 2023 07:35:14 +0100, Christoph Hellwig wrote:
> While del_gendisk ensures there is no outstanding I/O on the queue,
> it can't prevent block layer users from building new I/O.
>
> This leads to a NULL ->root_blkg reference in bio_associate_blkg when
> allocating a new bio on a shut down file system. Delay freeing the
> blk-cgroup subsystems from del_gendisk until disk_release to make
> sure the blkg and throttle information is still avaіlable for bio
> submitters, even if those bios will immediately fail.
>
> [...]
Applied, thanks!
[1/1] blk-cgroup: delay calling blkcg_exit_disk until disk_release
commit: c43332fe028c252a2a28e46be70a530f64fc3c9d
Best regards,
--
Jens Axboe
