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Date:	Sun, 19 Jun 2016 17:27:02 +0300
From:	Saeed Mahameed <>
To:	Eric Dumazet <>
Cc:	Alexei Starovoitov <>,
	Saeed Mahameed <>,
	"David S. Miller" <>,
	Linux Netdev List <>,
	Doug Ledford <>,
	Or Gerlitz <>,
	Maor Gottlieb <>,
	Huy Nguyen <>, Tal Alon <>,
	Daniel Borkmann <>
Subject: Re: [PATCH net-next 12/18] IB/mlx5: Add kernel offload flow-tag

On Sat, Jun 18, 2016 at 2:34 AM, Eric Dumazet <> wrote:
> On Fri, Jun 17, 2016 at 3:31 PM, Saeed Mahameed
> <> wrote:
>> Today there are some bad usages and abuse to skb->protocol where some
>> device drivers set skb->protocol = 0xffffff to skip the kernel TCP/IP
>> processing for the same diagnostic purposes.
>> In this series we are just trying to do the right thing.
> Well, your patch adds an extra test in kernel fast path, just to ease
> the life of people using kernel bypass,
> but willing to use tcpdump because they can not figure to do this in
> user space properly.
> Please find a way  _not_ adding a single instruction in kernel fast path.

Well, we can set skb->protocol = 0xffff.
what do you think ?

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