netdev - Re: r8169 link up but no traffic, and watchdog error

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Date: Fri, 25 Aug 2023 18:55:56 +0200
From: Heiner Kallweit <hkallweit1@...il.com>
To: Martin Kjær Jørgensen <me@...y.org>
Cc: nic_swsd@...ltek.com, Jakub Kicinski <kuba@...nel.org>,
 "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: r8169 link up but no traffic, and watchdog error

On 24.08.2023 11:22, Martin Kjær Jørgensen wrote:
> 
> On Thu, Aug 24 2023, Heiner Kallweit <hkallweit1@...il.com> wrote:
> 
>> On 18.08.2023 13:49, Martin Kjær Jørgensen wrote:
>>>
>>> On Wed, Aug 09 2023, Jakub Kicinski <kuba@...nel.org> wrote:
>>>
>>>>
>>>> There were some fix in r8169 for power management changes recently.
>>>> Could you try the latest stable kernel? 6.4.9 ?
>>>>
>>>
>>> I have just upgraded to latest Debian testing kernel (6.4.0-3-amd64 #1 SMP
>>> PREEMPT_DYNAMIC Debian 6.4.11-1) but it doesn't seem to make much
>>> difference. I can trigger the same issue again, and get similar kernel error
>>> as before:
>>>
>> From the line above it's not clear which kernel version is used. Best test with a
>> self-compiled mainline kernel.
>>
>> Please test also with the different ASPM L1 states disabled, you can use the sysfs
>> attributes under /sys/class/net/enp3s0/device/link/ for this.
> 
> My BIOS doesn't seem to allow ASPM even though the BIOS option is set to
> "Auto" insteadof "Disabled".
> 
Good to know, in this the NIC doesn't trigger transitions to ASPM states.
Having said that your issue doesn't seem to be ASPM-related.

> ~ $ dmesg | grep -i aspm
> [    0.118432] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it
> [    0.199782] acpi PNP0A08:00: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI HPX-Type3]
> [    0.201735] acpi PNP0A08:00: FADT indicates ASPM is unsupported, using BIOS configuration
> [    0.750649] r8169 0000:03:00.0: can't disable ASPM; OS doesn't have ASPM control
> [    0.771525] r8169 0000:04:00.0: can't disable ASPM; OS doesn't have ASPM control
> [    0.791797] r8169 0000:08:00.0: can't disable ASPM; OS doesn't have ASPM control
> [    0.807683] r8169 0000:09:00.0: can't disable ASPM; OS doesn't have ASPM control
> 
> I cannot see any ASPM files in /sys/class/net/enp*s*/device .
> 
> -r--r--r-- 1 root root 4096 aug 24 10:31 iflink
> -r--r--r-- 1 root root 4096 aug 24 10:32 link_mode
> -rw-r--r-- 1 root root 4096 aug 24 10:32 mtu
> -r--r--r-- 1 root root 4096 aug 24 10:31 name_assign_type
> 
>>
>> Best bisect between last known good kernel and latest 6.4 version.
>>