netdev - Re: About r8169 regression 5.4

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Message-ID: <673c3c72-001e-a7b8-86a7-35772d719a9c@gmail.com>
Date:   Sun, 12 Apr 2020 14:56:25 +0300
From:   Lauri Jakku <ljakku77@...il.com>
To:     Salvatore Bonaccorso <carnil@...ian.org>,
        Vincas Dargis <vindrg@...il.com>
Cc:     Heiner Kallweit <hkallweit1@...il.com>, netdev@...r.kernel.org
Subject: Re: About r8169 regression 5.4

I have patch ready for it

On 2020-02-15 18:12, Salvatore Bonaccorso wrote:
> Hi Vincas,
>
> On Sat, Feb 15, 2020 at 11:22:01AM +0200, Vincas Dargis wrote:
>> 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.
> You can generate the a7a92cf81589 revert patch, and then for simple
> testing of a patch and build have a look at the Simple patching and
> building[1] section of the kernel handbook.
>
> Hope this helps,
>
> Regards,
> Salvatore
>
>  [1] https://kernel-team.pages.debian.net/kernel-handbook/ch-common-tasks.html#s4.2.2