netdev - Re: [PATCH net-next] IP_GRE: Fix IP-Identification.

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Message-ID: <1361513185.3683.1.camel@edumazet-glaptop>
Date:	Thu, 21 Feb 2013 22:06:25 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Pravin Shelar <pshelar@...ira.com>
Cc:	netdev@...r.kernel.org, edumazet@...gle.com, jesse@...ira.com
Subject: Re: [PATCH net-next] IP_GRE: Fix IP-Identification.

On Thu, 2013-02-21 at 19:42 -0800, Pravin Shelar wrote:

> Without this patch GRE-GSO generates ip fragments with id 0,2,3,4...
> for every GSO packet, which is not correct. This patch fixes it.
> --

I guess my question was more : Why dont we inherit ID from the inner
packet ?

ip_select_ident_more() is a performance killer, as all cpus are going to
access a shared counter in the dst.

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