netdev - Re: [net] e1000: Small packets may get corrupted during padding by HW

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Date:	Tue, 18 Sep 2012 07:45:20 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Alexander Duyck <alexander.duyck@...il.com>
Cc:	David Miller <davem@...emloft.net>, alexander.h.duyck@...el.com,
	tushar.n.dave@...el.com, john.r.fastabend@...el.com,
	mirqus@...il.com, jeffrey.t.kirsher@...el.com,
	netdev@...r.kernel.org, gospo@...hat.com, sassmann@...hat.com
Subject: Re: [net] e1000: Small packets may get corrupted during padding by
 HW

On Mon, 2012-09-17 at 20:27 -0700, Alexander Duyck wrote:

> It also just occurred to me that there might be some benefit in cache 
> aligning the max header size.  It seems like doing something like that 
> should reduce the overall memory footprint and would probably improve 
> performance.

Given that most ACK packets are 66 bytes (14 ethernet + 20 IP + 32 TCP),
I am not sure we need to make any tweak on alignment ?


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