Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753771AbXKDUaI (ORCPT ); Sun, 4 Nov 2007 15:30:08 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751176AbXKDU35 (ORCPT ); Sun, 4 Nov 2007 15:29:57 -0500 Received: from pentafluge.infradead.org ([213.146.154.40]:40874 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751428AbXKDU35 (ORCPT ); Sun, 4 Nov 2007 15:29:57 -0500 Subject: Re: device struct bloat From: Peter Zijlstra To: Stephen Hemminger Cc: Greg KH , linux-kernel@vger.kernel.org In-Reply-To: <20071103124823.6059640e@shemminger-laptop> References: <20071103124823.6059640e@shemminger-laptop> Content-Type: text/plain Date: Sun, 04 Nov 2007 21:29:18 +0100 Message-Id: <1194208158.5911.63.camel@lappy> Mime-Version: 1.0 X-Mailer: Evolution 2.12.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 807 Lines: 21 On Sat, 2007-11-03 at 12:48 -0700, Stephen Hemminger wrote: > The sizeof(struct device) is way too big, especially in the network device case. > We want to support 1000's of device's and the change from class_device to > net_device has caused needless bloat. > > sizeof(struct device) = 272 > sizeof(struct class_device) = 92 > * not the class_id in class_device could also be removed or changed to > a ptr, since it is redundant for net_devices. The thing that surprised me most was that it contains a struct semaphore, Greg, is that really needed? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/