netdev - Re: Where exactly will arch_fast

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Date:	Sun, 07 Dec 2014 15:06:43 +0100
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	George Spelvin <linux@...izon.com>
Cc:	herbert@...dor.apana.org.au, davem@...emloft.net,
	dborkman@...hat.com, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, tgraf@...g.ch, tytso@....edu
Subject: Re: Where exactly will arch_fast_hash be used

On So, 2014-12-07 at 08:23 -0500, George Spelvin wrote:
> So there are plenty of hash tables in Linux that you don't dare use this
> with.  In fact, so many that, as you rightly point out, it's not clear
> if it's worth providing this special optimization for the few remaining.

In case of openvswitch it shows a performance improvment. The seed
parameter could be used as an initial biasing of the crc32 function, but
in case of openvswitch it is only set to 0.

Bye,
Hannes


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