David Miller [off-list ref] wrote:

From: Ben Hutchings <redacted>
Date: Wed, 30 Apr 2008 22:48:46 +0100

quoted

Large Receive Offload (LRO) destroys packet headers that should be
preserved when forwarding.  Currently it also triggers a BUG() or WARN()
in skb_gso_segment().  We should disable it wherever forwarding is
enabled, and discard LRO skbs with a warning if it is turned back on.

Thanks for reposting your work, I'll take a closer look at these
two patches later today.

This patch completely breaks forwarding of GSO packets in a
virtualised environment where we explicitly want to forward
them as is to reduce per-packet overhead.  So if LRO is causing
problems then I suggest we find a better way around that that
does not penalise all forms of GSO.

Thanks,
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