On Fri, Aug 11, 2023 at 04:53:44PM +0800, Yu Kuai <yukuai1@xxxxxxxxxxxxxxx> wrote: > Yes, it'm implemented in the upper layer that rq_qos_add() and > blkcg_activate_policy() should be atmoic, and currently there is no > comments for that. The check (iolat_rq_qos()) and use (activating the policy) should be the atomic pair. > Perhaps it's better to add some comments like following in rq_qos_add() > instead? Honestly, I find the current variant (v3) good as it is -- closest to the pair of the operations. (But it's merely a comment so ¯\_(ツ)_/¯) Michal
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