netdev - Re: About r8169 regression 5.4

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Message-ID: <97b0eb30-7ae2-80e2-6961-f52a8bb26b81@gmail.com>
Date:   Sat, 15 Feb 2020 11:22:01 +0200
From:   Vincas Dargis <vindrg@...il.com>
To:     Heiner Kallweit <hkallweit1@...il.com>
Cc:     netdev@...r.kernel.org
Subject: Re: About r8169 regression 5.4

2020-02-14 22:14, Heiner Kallweit rašė:
> On 14.02.2020 18:21, Vincas Dargis wrote:
>> Hi,
>>
>> I've found similar issue I have myself since 5.4 on mailing list archive [0], for this device:
>>
> Thanks for reporting. As you refer to [0], do you use jumbo packets?

Not sure, I guess not, because "1500"?

$ ip link | fgrep enp
2: enp5s0f1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group 
default qlen 1000

> Best of course would be a bisect between 5.3 and 5.4. Can you do this?
> I have no test hardware with this chip version (RTL8411B).

Uhm, never done that, I'll have to research how do I "properly" build kernel in "Debian way" first.

> You could also try to revert a7a92cf81589 ("r8169: sync PCIe PHY init with vendor driver 8.047.01")
> and check whether this fixes your issue.
> In addition you could test latest 5.5-rc, or linux-next.

I've tried linux-image-5.5.0-rc5-amd64  (5.5~rc5-1~exp1) package form Debian experimental, issue 
"WARNING: CPU: 6 PID: 0 at net/sched/sch_generic.c:447 dev_watchdog+0x248/0x250" still occurs after 
some time after boot.

I'll try first to rebuild one of the Debian kernels after reverting that a7a92cf81589 patch, for 
starters.

Thanks for your response Heiner!