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

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

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

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

Kernel 6.1 stable already contains them. Kernel 5.10 stable does not contain the patch which causes problems.

Hauke