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Date: Fri, 22 Aug 2025 15:14:52 +0200
From: Greg KH <gregkh@linuxfoundation.org>
To: Hauke Mehrtens <hauke@hauke-m.de>
Cc: stable@vger.kernel.org, Lion Ackermann <nnamrec@gmail.com>,
	Jamal Hadi Salim <jhs@mojatatu.com>, netdev@vger.kernel.org
Subject: Re: stable 5.15 backport: sch_*: make *_qlen_notify() idempotent
Message-ID: <2025082202-albatross-atlas-b4c2@gregkh>
References: <87960e35-5b7b-4b7e-9bba-50db6292cd5b@hauke-m.de>
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In-Reply-To: <87960e35-5b7b-4b7e-9bba-50db6292cd5b@hauke-m.de>

On Thu, Aug 07, 2025 at 07:44:29PM +0200, Hauke Mehrtens wrote:
> Hi,
> 
> Kernel 5.15.189 is showing a warning caused by:
> commit e269f29e9395527bc00c213c6b15da04ebb35070
> Author: Lion Ackermann <nnamrec@gmail.com>
> Date:   Mon Jun 30 15:27:30 2025 +0200
>      net/sched: Always pass notifications when child class becomes empty
>      [ Upstream commit 103406b38c600fec1fe375a77b27d87e314aea09 ]
> 
> See here for details: https://www.spinics.net/lists/netdev/msg1113109.html
> 
> To fix this please backport the following 4 commits to 5.15 stable:
> 
> commit 5ba8b837b522d7051ef81bacf3d95383ff8edce5
> Author: Cong Wang <xiyou.wangcong@gmail.com>
> Date:   Thu Apr 3 14:10:23 2025 -0700
> 
>     sch_htb: make htb_qlen_notify() idempotent

Now applied.

> commit df008598b3a00be02a8051fde89ca0fbc416bd55
> Author: Cong Wang <xiyou.wangcong@gmail.com>
> Date:   Thu Apr 3 14:10:24 2025 -0700
> 
>     sch_drr: make drr_qlen_notify() idempotent

Does not apply, please provide a working backport.

> commit 51eb3b65544c9efd6a1026889ee5fb5aa62da3bb
> Author: Cong Wang <xiyou.wangcong@gmail.com>
> Date:   Thu Apr 3 14:10:25 2025 -0700
> 
>     sch_hfsc: make hfsc_qlen_notify() idempotent

Now applied

> commit 55f9eca4bfe30a15d8656f915922e8c98b7f0728
> Author: Cong Wang <xiyou.wangcong@gmail.com>
> Date:   Thu Apr 3 14:10:26 2025 -0700
> 
>     sch_qfq: make qfq_qlen_notify() idempotent

Now applied, thanks.

greg k-h