netdev - Re: [RFC, PATCH] IPV6 : add 64 bits components in struct in6_addr to speedup ipv6_addr_equal() & ipv6_addr

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Message-Id: <20070430.122257.68157976.davem@davemloft.net>
Date:	Mon, 30 Apr 2007 12:22:57 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	dada1@...mosbay.com
Cc:	brian.haley@...com, yoshfuji@...ux-ipv6.org, netdev@...r.kernel.org
Subject: Re: [RFC, PATCH] IPV6 : add 64 bits components in struct in6_addr
 to speedup ipv6_addr_equal() & ipv6_addr_any()

From: Eric Dumazet <dada1@...mosbay.com>
Date: Mon, 30 Apr 2007 21:08:45 +0200

> Maybe we could at least define a 'struct in6_addr_k' for internal
> structures only, to speedup some parts of IPV6 stack.

I think it's better to put this on the backburner for now :-)

We could achieve all of this if we start from the bottom
and work our way up.

Although there are many variations, the logic drivers use to use
skb_reserve() to align the receive header tends to take on a certain
pattern.  We could pull that out into a common piece of code and then
make it ensure 64-bit alignment without a lot of pain.

The hard part of the work will be handling the cases that don't
fit the pattern, and don't forget about NET_IP_ALIGN :-)

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