netdev - Re: [PATCH 4/4] rps: Inspect GRE encapsulated packets to get flow hash

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Message-ID: <BANLkTi=Q3N+_OEp4sLJu7wz5OW6gOCkciA@mail.gmail.com>
Date:	Thu, 19 May 2011 13:06:08 -0700
From:	Tom Herbert <therbert@...gle.com>
To:	David Miller <davem@...emloft.net>
Cc:	eric.dumazet@...il.com, netdev@...r.kernel.org
Subject: Re: [PATCH 4/4] rps: Inspect GRE encapsulated packets to get flow hash

> Unless you look inside of the tunnel, you may not have any entropy
> at all for packet steering and that seems to be what Tom is trying
> to attack here.
>
Entropy for RPS, but flow identifier for RFS.  Also, this is not just
a SW problem, RSS doesn't seem to do anything creative with GRE
packets... I'm hoping we'll be able get support in NICs to do this
same functionality.
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