linux-kernel - Re: [PATCH RESEND v6 8/8] blk-throttle: clean up flag 'THROTL_TG

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Date:   Thu, 28 Jul 2022 19:03:17 +0800
From:   Yu Kuai <yukuai1@...weicloud.com>
To:     Tejun Heo <tj@...nel.org>, Yu Kuai <yukuai1@...weicloud.com>
Cc:     mkoutny@...e.com, axboe@...nel.dk, ming.lei@...hat.com,
        cgroups@...r.kernel.org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, yi.zhang@...wei.com,
        "yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH RESEND v6 8/8] blk-throttle: clean up flag
 'THROTL_TG_PENDING'



在 2022/07/28 2:44, Tejun Heo 写道:
> On Fri, Jul 01, 2022 at 05:34:41PM +0800, Yu Kuai wrote:
>> From: Yu Kuai <yukuai3@...wei.com>
>>
>> All related operations are inside 'queue_lock', there is no need to use
>> the flag, we only need to make sure throtl_enqueue_tg() is called when
>> the first bio is throttled, and throtl_dequeue_tg() is called when the
>> last throttled bio is dispatched.
> 
> Ah, okay, so the prev patch was to enable this cleanup. Can you please note
> so in the previous patch and also that this doesn't cause any functional
> changes?
> 

Of course, I'll do that in next iteration.

Thanks,
Kuai
> Thanks.
>