From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hannes Frederic Sowa Subject: Re: Where exactly will arch_fast_hash be used Date: Sun, 07 Dec 2014 15:06:43 +0100 Message-ID: <1417961203.17658.52.camel@localhost> References: <20141207132305.24691.qmail@ns.horizon.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: herbert@gondor.apana.org.au, davem@davemloft.net, dborkman@redhat.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tgraf@suug.ch, tytso@mit.edu To: George Spelvin Return-path: In-Reply-To: <20141207132305.24691.qmail@ns.horizon.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org 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