Re: [PATCH net-next] ipv6: optimize ipv6 addresses compares

[David Miller <davem@xxxxxxxxxxxxx>]

From: Eric Dumazet <eric.dumazet@xxxxxxxxx>
Date: Wed, 11 Jul 2012 05:49:18 +0200

> From: Eric Dumazet <edumazet@xxxxxxxxxx>
> 
> On 64 bit arches having efficient unaligned accesses (eg x86_64) we can
> use long words to reduce number of instructions for free.
> 
> Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx>
> Cc: Joe Perches <joe@xxxxxxxxxxx>

Maybe we can even be sure that they are 64-bit aligned too?

If there's an embedded u64 in the in6_addr union, they really should
be.

It can't even be an issue in the protocol headers, because in the
socket demux we read the two 32-bit ipv4 addresses in the packet
header as one 64-bit chunk already.
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