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Message-ID: <7f3221eb-d5c1-5018-cdcc-979d436fa386@kernel.dk>
Date:   Sun, 29 Jan 2023 14:48:50 -0700
From:   Jens Axboe <axboe@...nel.dk>
To:     Yu Kuai <yukuai1@...weicloud.com>, tj@...nel.org, hch@....de,
        josef@...icpanda.com
Cc:     cgroups@...r.kernel.org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, yi.zhang@...wei.com,
        yangerkun@...wei.com, "yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH -next v3 0/3] blk-cgroup: make sure pd_free_fn() is called
 in order

On 1/28/23 11:06 PM, Yu Kuai wrote:
> Hi, Jens
> 
> 在 2023/01/20 2:54, Jens Axboe 写道:
>> On 1/19/23 4:03 AM, Yu Kuai wrote:
>>> From: Yu Kuai <yukuai3@...wei.com>
>>>
>>> Changes in v3:
>>>   - add ack tag from Tejun for patch 1,2
>>>   - as suggested by Tejun, update commit message and comments in patch 3
>>>
>>> The problem was found in iocost orignally([1]) that ioc can be freed in
>>> ioc_pd_free(). And later we found that there are more problem in
>>> iocost([2]).
>>>
>>> After some discussion, as suggested by Tejun([3]), we decide to fix the
>>> problem that parent pd can be freed before child pd in cgroup layer
>>> first. And the problem in [1] will be fixed later if this patchset is
>>> applied.
>>
>> Doesn't apply against for-6.3/block (or linux-next or my for-next, for
>> that matter). Can you resend a tested one against for-6.3/block?
>>
> 
> This is weird, I just test latest linux-next, and I can apply this
> patchset on the top of following commit:
> 
> For latest for-6.3/block, this patch 2 can't be applied because
> following commit is not here:
> 
> e3ff8887e7db blk-cgroup: fix missing pd_online_fn() while activating policy
> 
> But this patch is already merged into 6.2-rc5.

Since I have one more conflict, I think we'll just rebase for-6.3/block
when -rc6 is out, and then it should apply cleanly.

-- 
Jens Axboe


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