From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jamal Hadi Salim Subject: Re: [RFC PATCH 00/12] RCU'ify the net:sched classifier chains Date: Sun, 12 Jan 2014 08:57:32 -0500 Message-ID: <52D29F4C.90808@mojatatu.com> References: <20140110092041.7193.5952.stgit@nitbit.x32> <52D2987D.5060807@mojatatu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, davem@davemloft.net To: John Fastabend , xiyou.wangcong@gmail.com, eric.dumazet@gmail.com Return-path: Received: from mail-ie0-f179.google.com ([209.85.223.179]:60354 "EHLO mail-ie0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750955AbaALN5f (ORCPT ); Sun, 12 Jan 2014 08:57:35 -0500 Received: by mail-ie0-f179.google.com with SMTP id tp5so1092528ieb.24 for ; Sun, 12 Jan 2014 05:57:34 -0800 (PST) In-Reply-To: <52D2987D.5060807@mojatatu.com> Sender: netdev-owner@vger.kernel.org List-ID: On 01/12/14 08:28, Jamal Hadi Salim wrote: > I will scan through the patches... > I looked and here's a general question: Does even using RCU make any sense here? What we have is a lot of updates and very very little reads (reads essentially are done from the control side; the data path is is all about updates). I am not sure if RCU is a win in such a case - it could make things worse. At least that used to be the Truth(tm) many moons back. Is that not the case anymore? cheers, jamal > This is fun stuff - I will try to participate whenever i can > (unfortunately not much time at the moment). >