Re: [PATCH-block v3 2/2] blk-cgroup: Flush stats at blkgs destruction path

[Tejun Heo]

On Tue, Dec 13, 2022 at 01:44:46PM -0500, Waiman Long wrote:
> +	/*
> +	 * Flush all the non-empty percpu lockless lists so as to release
> +	 * the blkg references held by those lists which, in turn, may
> +	 * allow the blkgs to be freed and release their references to
> +	 * blkcg speeding up its freeing.
> +	 */

Can you mention the possible deadlock explicitly? This sounds more like an
optimization.

Thanks.

-- 
tejun