netdev - Re: [PATCH] net: make struct net_device::min_header

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Message-Id: <20170412.135940.1431947186410769270.davem@davemloft.net>
Date:   Wed, 12 Apr 2017 13:59:40 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     adobriyan@...il.com
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH] net: make struct net_device::min_header_len 8-bit

From: Alexey Dobriyan <adobriyan@...il.com>
Date: Mon, 10 Apr 2017 11:25:26 +0300

> This field is never big enough to warrant 16-bitness.
> 
> 8-bit accesses enjoy shorted encoding on i386/x86_64 than 16-bit
> accesses:
> 
> 	add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-10 (-10)
> 	function                                     old     new   delta
> 	loopback_setup                               169     164      -5
> 	ether_setup                                  148     143      -5
> 
> Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>

Applied.