From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 13 Nov 2002 23:27:50 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 13 Nov 2002 23:27:49 -0500 Received: from parcelfarce.linux.theplanet.co.uk ([195.92.249.252]:5639 "EHLO www.linux.org.uk") by vger.kernel.org with ESMTP id ; Wed, 13 Nov 2002 23:27:49 -0500 Message-ID: <3DD327BF.4040705@pobox.com> Date: Wed, 13 Nov 2002 23:34:07 -0500 From: Jeff Garzik User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2b) Gecko/20021018 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rusty Russell CC: Roman Zippel , linux-kernel@vger.kernel.org Subject: Re: Modules and the Interfaces who Love Them (Take I) References: <20021114032456.5676D2C0C9@lists.samba.org> In-Reply-To: <20021114032456.5676D2C0C9@lists.samba.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Rusty Russell wrote: > Slow: Your approach where every interface has to do reference counts > even though they're only useful for modules makes every interface > slow, whether they are using modules or not. You can't make them > fast, because that would make every interface NR_CPUS * > sizeof(cacheline) larger. (tangent alert) Objects controlled by interfaces typically should be ref-counted... life in the kernel is slowly getting better WRT this, but we're not there yet. In any case, the ref counts help, not hurt. Jeff