Bug#932996: linux-image-4.19.0-5-amd64: e1000e driver crashes under high TX load; `ethtool -K eno1 tso off` resolves issue.

[Salvatore Bonaccorso <carnil@debian.org>]

Control: tags -1 + moreinfo

On Thu, Jul 25, 2019 at 09:58:33AM -0700, John wrote:
> Package: src:linux
> Version: 4.19.37-6
> Severity: normal
> 
> Dear Maintainer,
> 
> Observed flaky network interface under high TX load with guest OS
> bridging across eno1 interface. Issue only manifested under load, and
> exhibited flapping in dmesg, e.g.:
> e1000e 0000:00:1f.6 eno1: Reset adapter unexpectedly
> br0: port 1(eno1) entered disabled state).
> 
> Issue appears to be resolved by disabling TSO with:
> `ethtool -K eno1 tso off`
> 
> Googling around suggests this may be a common problem with this driver
> -- possibly should default to tso off? See possibly related links:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1766377
> https://serverfault.com/questions/616485/e1000e-reset-adapter-unexpectedly-detected-hardware-unit-hang

Is this issue still triggerable for you with a recent kernel from
either unstable, buster-backports or even mainline without needing to
set tso off?

Regards,
Salvatore