netdev - Re: [v2 PATCH 3/10] rhashtable: Allow hashfn to be unset

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Date:	Mon, 23 Mar 2015 21:18:26 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Thomas Graf <tgraf@...g.ch>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Patrick McHardy <kaber@...sh.net>,
	Josh Triplett <josh@...htriplett.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	netdev@...r.kernel.org
Subject: Re: [v2 PATCH 3/10] rhashtable: Allow hashfn to be unset

On Mon, Mar 23, 2015 at 09:58:42AM +0000, Thomas Graf wrote:
>
> nft_hash sets key_len to set->klen and passes it to rhashtable_init().
> rhashtable_init() should then fall back to jhash() or jhash2() if no
> hashfn is provided. Why is the logic in rht_key_hashfn() different?
> Actually, in which case is ht->p.hashfn not set in rht_key_hashfn()?

jhash can be used in place of jhash2, the only difference is
that jhash is less optimised and uses unaligned loads.

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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