Hi
We are experiencing a recurrent Linux kernel panic with the e1000e
driver on a Kontron mSP1 COM Express "mini" CPU module and other similar
COM Express modules.
Unfortunately I am currently not able to save a kernel dump on the
machines, but please see the attached jpeg image.
The problem occurs frequently (right after booting and bringing the
interface up) but not constantly. I suspect that we enter some kind of
race condition.
However it can easily be reproduced by bringing the interface up and
down in a loop -and ping-flooding it from another host.
on kontron:
while true; do ifdown eth0; ifup eth0; done
on other Linux host:
ping -s1024 -w0 -f 192.168.4.1
The panic will then happen every time after 1-240 seconds.
I have been experimenting with various Linux kernels starting from 3.4
to 3.10.20 and various tweaked configurations -but we are currently
clinging on to 3.10.10 for other reasons. I have also experimented with
various versions of the e1000e driver from kernel.org and the e1000(e)
Sourceforge project. However the problem seems identical for all kernels
and driver versions.
I have attached kernel configuration, and various information from the
machine, that might help identifying the issue. All output is from an
unpatched 3.10.10 kernel from kernel.org and done on the same machine.
The bom.txt file includes information about the (busybox based)
userspace, all other output files should be easily identified by their
name.
The attached files are also uploaded to Dropbox here:
https://www.dropbox.com/sh/bgvme32vuzpwg4v/qHaFUZ5Tu-
Any help or ideas for debugging and problem solving will be greatly
appreciated.
Best regards
Morten Østergaard
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