newbie question on networking kernel panics.

newbie question on networking kernel panics.

[Jeroen Baten]

Hi,

I have been working on a Linux desktop for the last 20 odd years.
Currently running Ubuntu 20.04.

Yesterday I enabled the option "Flow control" on my TP-Link TL-SG1024DE.

Subsequently I was forced to enjoy 3 kernel panics in the timespan of 18
hours.

After disabling the "Flow control" option my system seems to be stable
again.

I do have 3 sets of "cut here" text if somebody would be interested.

Please let me know if this information is of interest to someone or if I
am barking up the wrong majordomo tree.

Kind regards and thanks to all here for your immensely valuable work,

Jeroen Baten

-- 
Jeroen Baten              | EMAIL :  JBATEN@I2RS.NL
 ____  _  __              | web   :  www.i2rs.nl
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 _|_/_| \__)              | Frisolaan 16, 4101 JK, Culemborg, the Netherlands

Re: newbie question on networking kernel panics.

[Willy Tarreau]

Hi Jeroen,

On Thu, Jul 16, 2020 at 05:38:57PM +0200, Jeroen Baten wrote:
> Hi,
> 
> I have been working on a Linux desktop for the last 20 odd years.
> Currently running Ubuntu 20.04.
> 
> Yesterday I enabled the option "Flow control" on my TP-Link TL-SG1024DE.
> 
> Subsequently I was forced to enjoy 3 kernel panics in the timespan of 18
> hours.
> 
> After disabling the "Flow control" option my system seems to be stable
> again.
> 
> I do have 3 sets of "cut here" text if somebody would be interested.
> 
> Please let me know if this information is of interest to someone or if I
> am barking up the wrong majordomo tree.
> 
> Kind regards and thanks to all here for your immensely valuable work,

Since distro kernels contain some extra patches, may miss a significant
number of fixes, or even rely on different driver sources, you really
need to report this issue to your distro, who will ask for your exact
kernel version. It may be that this issue also affects the vanilla
kernel in the end, but in this case it will be reported by the distro's
maintainers once they've verified that it's not related to their kernel's
differences.

Hoping this helps,
Willy

Re: newbie question on networking kernel panics.

[Andrew Lunn]

On Thu, Jul 16, 2020 at 06:40:12PM +0200, Willy Tarreau wrote:
> Hi Jeroen,
> 
> On Thu, Jul 16, 2020 at 05:38:57PM +0200, Jeroen Baten wrote:
> > Hi,
> > 
> > I have been working on a Linux desktop for the last 20 odd years.
> > Currently running Ubuntu 20.04.
> > 
> > Yesterday I enabled the option "Flow control" on my TP-Link TL-SG1024DE.
> > 
> > Subsequently I was forced to enjoy 3 kernel panics in the timespan of 18
> > hours.
> > 
> > After disabling the "Flow control" option my system seems to be stable
> > again.
> > 
> > I do have 3 sets of "cut here" text if somebody would be interested.
> > 
> > Please let me know if this information is of interest to someone or if I
> > am barking up the wrong majordomo tree.
> > 
> > Kind regards and thanks to all here for your immensely valuable work,
> 
> Since distro kernels contain some extra patches, may miss a significant
> number of fixes, or even rely on different driver sources, you really
> need to report this issue to your distro, who will ask for your exact
> kernel version. It may be that this issue also affects the vanilla
> kernel in the end, but in this case it will be reported by the distro's
> maintainers once they've verified that it's not related to their kernel's
> differences.

Hi Jeroen

If you are up for building your own kernel, you can build something
like mainline 5.8-rc5 and see if you can reproduce it. If you can
reproduce it with plain mainline, we would be interested in the "cut
here" text.

      Andrew