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From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net-next 2/2] openvswitch: Use zerocopy if applicable
 when performing the upcall
Date: Mon, 10 Jun 2013 13:43:31 -0700 (PDT)
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From: Jesse Gross <jesse@nicira.com>
Date: Mon, 10 Jun 2013 13:34:23 -0700

> Well, this is the slow path. I don't want to force userspace to deal
> with this because it's an internal kernel optimization that is
> platform-specific and requires carrying additional metadata around.

I think the grounds for this rejection is over the top and
unreasonable.