From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934439AbaEFIcY (ORCPT ); Tue, 6 May 2014 04:32:24 -0400 Received: from canardo.mork.no ([148.122.252.1]:41933 "EHLO canardo.mork.no" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934253AbaEFIcU convert rfc822-to-8bit (ORCPT ); Tue, 6 May 2014 04:32:20 -0400 From: =?utf-8?Q?Bj=C3=B8rn_Mork?= To: Andi Kleen Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, tom.zanussi@linux.intel.com, Andi Kleen Subject: Re: [PATCH 19/24] net, diet: Make RPS configurable Organization: m References: <1399328773-6531-1-git-send-email-andi@firstfloor.org> <1399328773-6531-20-git-send-email-andi@firstfloor.org> Date: Tue, 06 May 2014 10:32:03 +0200 In-Reply-To: <1399328773-6531-20-git-send-email-andi@firstfloor.org> (Andi Kleen's message of "Mon, 5 May 2014 15:26:08 -0700") Message-ID: <87oazbux30.fsf@nemi.mork.no> User-Agent: Gnus/5.130009 (Ma Gnus v0.9) Emacs/23.4 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Andi Kleen writes: > From: Andi Kleen > > Multiple receive queues are not needed on small systems, > so allow disabling them. > > This is already disabled with !SMP, but it also makes > sense to disable on very small SMP systems (like > dual core SOC) Such a pointless design still doesn't mean that you *have* to enable SMP, does it? How much would you save all over the kernel by simply disabling SMP? As for the system design: It seems to me that it would be more useful to replace one of the CPU cores with some RAM... Bjørn