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

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Date:   Wed, 20 Jun 2018 09:00:23 +0200 (CEST)
From:   Marco Berizzi <pupilla@...ero.it>
To:     Cong Wang <xiyou.wangcong@...il.com>
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]

> Il 19 giugno 2018 alle 13.42 Marco Berizzi <pupilla@...ero.it> ha scritto:
> 
> > Il 18 giugno 2018 alle 21.28 Cong Wang <xiyou.wangcong@...il.com> ha scritto:
> > 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. :)
> 
> Hi Cong,
> 
> Thanks a lot for the patch. I'm building 4.17.2 + your patch.
> Within 24 hours I will update you.

Hi Cong,

I have applied your patch to 4.17.2
>From my point of view hfsc is working as expected.
However my setup is pretty simple:

tc class add dev eth2 parent 1:2 classid 1:16 hfsc ls rate 3000kbit ul rate 20000kbit

I can see hfsc is shaping my traffic to 20MBit/s.
The error message has not popped up :-)
I will drop you a message withing 48 hours for confirmation.
Will this patch merged in a future kernel release?

Thanks a lot Cong.

Marco