netdev - Re: arp

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Message-ID: <20150322234218.GA9243@gondor.apana.org.au>
Date:	Mon, 23 Mar 2015 10:42:18 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, roland@...estorage.com
Subject: Re: arp_hash

On Sun, Mar 22, 2015 at 06:57:14PM -0400, David Miller wrote:
> From: Herbert Xu <herbert@...dor.apana.org.au>
> Date: Mon, 23 Mar 2015 08:34:08 +1100
> 
> > So what scales we are talking about, twice, three times? Have you
> > considered more modern hashes such as SipHash or SpookyHash
> > (successor to jhash/lookup3 and supposedly faster)?
> 
> I want it to be one cycle or two.
> 
> Every single transmitted packet hits this hash demux.

For hosts can we cache this? For routers I guess this is just
the mummified remains of the route cache :)

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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