Florian Bruhin <m...@the-compiler.org> writes:

> Hi,
>
> (this is the first time I'm reporting a but against the kernel - so
> please bear with me, and if I'm doing anything wrong or anything is
> missing, please let me know!)
>
> I have a Thinkpad x220t with an Ericsson F5521gw WWAN interface,
> running Archlinux.
>
> Since updating my kernel from 3.19.3 to 4.0.2 I see the following
> behaviour, which I can also reproduce with 4.1.0 mainline:
>
> The network interface (wwan0) has traffic spikes of some gigabytes per
> second in ifconfig or conky - right now, 10 minutes after booting, I
> see this:
>
>     RX packets 4083  bytes 2277043 (2.1 MiB)
>     RX errors 0  dropped 0  overruns 0  frame 0
>     TX packets 3680  bytes 12025908915562 (10.9 TiB)
>     TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Yes, I am able to reproduce this problem.  It is an effect of the feable
attempts to make it count the actual transmitted data instead of the
variable padding.  Which obviously was a failure, resulting in counters
being more off than ever.

I'll try to figure out how this happened.


Bjørn
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