linux-kernel - Re: [PATCH -next v3 0/3] blk-cgroup: make sure pd_free

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Message-ID: <bd1c347b-cbf8-3917-401a-ed85c6ccb956@kernel.dk>
Date:   Thu, 19 Jan 2023 11:54:00 -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, yukuai3@...wei.com,
        yi.zhang@...wei.com, yangerkun@...wei.com
Subject: Re: [PATCH -next v3 0/3] blk-cgroup: make sure pd_free_fn() is called
 in order

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?

-- 
Jens Axboe