linux-kernel - Re: [PATCH v5 4/4] blk-cgroup: Document the design of new lockless iostat

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Message-ID: <3ba0799f-c008-bbdf-bbc1-626d8bb4b821@redhat.com>
Date:   Thu, 2 Jun 2022 15:12:53 -0400
From:   Waiman Long <longman@...hat.com>
To:     Tejun Heo <tj@...nel.org>
Cc:     Jens Axboe <axboe@...nel.dk>, cgroups@...r.kernel.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Ming Lei <ming.lei@...hat.com>
Subject: Re: [PATCH v5 4/4] blk-cgroup: Document the design of new lockless
 iostat_cpu list

On 6/2/22 15:05, Tejun Heo wrote:
> On Thu, Jun 02, 2022 at 02:54:01PM -0400, Waiman Long wrote:
>> A set of percpu lockless lists per block cgroup (blkcg) is added to
>> track the set of recently updated iostat_cpu structures. Add comment
>> in the code to document the design of this new set of lockless lists.
>>
>> Signed-off-by: Waiman Long <longman@...hat.com>
> Acked-by: Tejun Heo <tj@...nel.org>
>
> Thanks.

I have just realized that I forgot to free the percpu blkcg->lhead in 
blkcg_css_free(). I will send out v6 with this change as well as 
integrating this documentation patch back. Sorry for the omission.

Thanks,
Longman