netdev - Re: [patch 1/4] network dev read

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Message-Id: <20070315.002516.59485075.davem@davemloft.net>
Date:	Thu, 15 Mar 2007 00:25:16 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	dada1@...mosbay.com
Cc:	bcrl@...ck.org, shemminger@...ux-foundation.org,
	netdev@...r.kernel.org
Subject: Re: [patch 1/4] network dev read_mostly

From: Eric Dumazet <dada1@...mosbay.com>
Date: Thu, 15 Mar 2007 07:28:35 +0100

> One problem with your patch is that all read_always() of pointers are going to 
> use 3 bytes more of code, thus raising icache pressure.
> 
> 48 b8 c3 08 e8 8c af    mov    $0x71af8ce808c3,%rax
> 71 00 00
> 
> instead of %rip relative addressing
> 
> 48 8b 05 99 f3 09 00    mov    652185(%rip),%rax

Could we obtain %rip relative addressing with the ELF
relocation approach I mentioned?
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