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Message-ID: <1341979678.3265.6660.camel@edumazet-glaptop> Date: Wed, 11 Jul 2012 06:07:58 +0200 From: Eric Dumazet <eric.dumazet@...il.com> To: David Miller <davem@...emloft.net> Cc: netdev@...r.kernel.org, joe@...ches.com Subject: Re: [PATCH net-next] ipv6: optimize ipv6 addresses compares On Tue, 2012-07-10 at 21:02 -0700, David Miller wrote: > From: Eric Dumazet <eric.dumazet@...il.com> > Date: Wed, 11 Jul 2012 05:49:18 +0200 > > > From: Eric Dumazet <edumazet@...gle.com> > > > > 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@...gle.com> > > Cc: Joe Perches <joe@...ches.com> > > 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. I dont think this 8bytes alignment is possible with ip6tables. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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