Re: [Astlinux-users] APU2 keeps locking up

[Lonnie A. <li...@lo...>]

I would try this first
--
PHYETH_DISABLE_OFFLOAD="tso gso gro"
--
and see if it fixes the problem.

If by chance it does fix it, then it would not be needed in AstLinux 1.4.x.

The PHYETH_DISABLE_OFFLOAD settings disable some of the "offload" features of the NICs in an effort to work around this (somewhat obscure) kernel bug.

It all kind of makes sense that a particular provider is fragmenting packets in ways others do not, and hits this kernel bug.

The PHYETH_DISABLE_OFFLOAD setting above is very "safe", only drawback is it slightly reduces network performance near the 1 Gbps level.

BTW, if traffic shaping is enabled this PHYETH_DISABLE_OFFLOAD setting is already applied to external ethernet NIC(s).

Lonnie



> On Sep 19, 2020, at 6:09 PM, Michael Knill <mic...@ip...> wrote:
> 
> Awesome thanks Lonnie. 
> 
> I will give it a try although I have no idea what it does!
> I assume I can remove this when I go to Astlinux 1.4?
> 
> Regards
> Michael Knill
> 
> Sent from my iPhone so please excuse my brevity. 
> 
>> On 19 Sep 2020, at 11:56 pm, Lonnie Abelbeck <li...@lo...> wrote:
>> 
>> 
>> Hi Michael,
>> 
>> Great info!
>> 
>> Try this in your user.conf, and reboot.
>> --
>> PHYETH_DISABLE_OFFLOAD="tso gso gro"
>> --
>> 
>> If my hunch is correct, this kernel fix added in 4.1.17 may be related ...
>> 
>> net: preserve IP control block during GSO segmentation
>> https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/include/linux/skbuff.h?h=v4.1.17&id=abefd1b4087b9b5e83e7b4e7689f8b8e3cb2899c
>> 
>> Lonnie
>> 
>> 
>> 
>> > On Sep 18, 2020, at 10:56 PM, Michael Knill <mic...@ip...> wrote:
>> > 
>> > Yay some progress on this problem.
>> > 
>> > I had my 4th site lock up yesterday. It was a site I moved from one location to another. There were no changes to the Astlinux box at all other than PPPoE credentials but after a couple of hours it locked up. So realistically the only change is the internet provider which is a new one that I am trialling and is the same provider as two of the other sites that are failing. 
>> > 
>> > As we are also using this provider in our home office, I set up another box this morning and connected the serial port not expecting anything to happen but it locked up and we captured it. Yay! It is attached.
>> > 
>> > I'm hoping it will help the resolution of this problem.
>> > 
>> > Regards
>> > Michael Knill
>> > 
>> 
>> 
>> 
>> 
>> 
>>  
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