Re: [PATCH v2 1/2] blk-iocost: add refcounting for iocg

[Tejun Heo]

On Thu, Jan 05, 2023 at 09:14:07AM +0800, Yu Kuai wrote:
> 1) is related to blkg, while 2) is not, hence refcnting from blkg can't
> fix the problem. refcnting from blkcg_policy_data should be ok, but I
> see that bfq already has the similar refcnting, while other policy
> doesn't require such refcnting.

Hmm... taking a step back, wouldn't this be solved by moving the first part
of ioc_pd_free() to pd_offline_fn()? The ordering is strictly defined there,
right?

Thanks.

--
tejun