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Date:	Thu, 01 May 2008 18:19:54 +0800
From:	Herbert Xu <>
To: (David Miller)
Subject: Re: [PATCH 0/2] Disable forwarding of LRO skbs

David Miller <> wrote:
> From: Ben Hutchings <>
> Date: Wed, 30 Apr 2008 22:48:46 +0100
>> 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.

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