From: Matteo Croce <mcr...@redhat.com>
Date: Wed, 3 Apr 2019 01:11:36 +0200
> The thunderx driver forbids to load an eBPF program if the MTU is higher
> than 1500 bytes, but this can be circumvented by first loading the eBPF,
> and then raising the MTU.
>
> XDP assumes that SKBs are linear and fit in a single page, this can lead
> to undefined behaviours.
> Fix this by limiting the MTU to 1500 bytes if an eBPF program is loaded.
>
> Fixes: 05c773f52b96e ("net: thunderx: Add basic XDP support")
> Signed-off-by: Matteo Croce <mcr...@redhat.com>
Please respond to Jesper's feedback about your choice of a limit of 1500.
Otherwise I will toss your patch.
