netdev - Re: WARNING: CPU: 3 PID: 0 at net/sched/sch_hfsc.c:1388 hfsc_dequeue+0x319/0x350 [sch

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Message-ID: <CAM_iQpW9rNr3tPVKZ-8PpwdZ6Lw-jnf+BjA9KTTEdkziZbJ-bQ@mail.gmail.com>
Date:   Mon, 18 Jun 2018 12:28:52 -0700
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Marco Berizzi <pupilla@...ero.it>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: WARNING: CPU: 3 PID: 0 at net/sched/sch_hfsc.c:1388
 hfsc_dequeue+0x319/0x350 [sch_hfsc]

On Mon, Jun 4, 2018 at 11:39 PM, Marco Berizzi <pupilla@...ero.it> wrote:
>> Il 8 marzo 2018 alle 17.02 Marco Berizzi <pupilla@...ero.it> ha scritto:
>>
>> > Marco Berizzi wrote:
>> >
>> > Hello everyone,
>> >
>> > Yesterday I got this error on a slackware linux 4.16-rc4 system
>> > running as a traffic shaping gateway and netfilter nat.
>> > The error has been arisen after a partial ISP network outage,
>> > so unfortunately it will not trivial for me to reproduce it again.
>>
>> Hello everyone,
>>
>> I'm getting this error twice/day, so fortunately I'm able to
>> reproduce it.
>
> I'm getting the same error also with 4.17 (4.15.18 was
> the latest working version):

Can you test the attached patch?

It almost certainly fixes the warning, but I am not sure if
it papers out any other real problem. Please make sure
hfsc still works as expected. :)

Thanks.

Download attachment "hfsc.diff" of type "application/octet-stream" (715 bytes)