Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934373AbYAaSsu (ORCPT ); Thu, 31 Jan 2008 13:48:50 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1763225AbYAaSsk (ORCPT ); Thu, 31 Jan 2008 13:48:40 -0500 Received: from pentafluge.infradead.org ([213.146.154.40]:47997 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761406AbYAaSsi (ORCPT ); Thu, 31 Jan 2008 13:48:38 -0500 Date: Thu, 31 Jan 2008 10:48:11 -0800 From: Arjan van de Ven To: Sam Ravnborg Cc: Adrian Bunk , James Bottomley , davem@davemloft.net, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, "Maciej W. Rozycki" Subject: Re: [PATCH] kill hotplug init/exit section annotations Message-ID: <20080131104811.4c2d558f@laptopd505.fenrus.org> In-Reply-To: <20080131183425.GA2893@uranus.ravnborg.org> References: <20080130212011.GA26621@uranus.ravnborg.org> <1201729295.3292.94.camel@localhost.localdomain> <20080130223219.GT29368@does.not.exist> <20080131074436.GA31966@uranus.ravnborg.org> <1201795051.3131.13.camel@localhost.localdomain> <20080131081120.27505dc0@laptopd505.fenrus.org> <20080131162141.GC19700@cs181133002.pp.htv.fi> <20080131090749.72781689@laptopd505.fenrus.org> <20080131171436.GG19700@cs181133002.pp.htv.fi> <20080131094801.63a048f0@laptopd505.fenrus.org> <20080131183425.GA2893@uranus.ravnborg.org> Organization: Intel X-Mailer: Claws Mail 3.2.0 (GTK+ 2.12.3; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1869 Lines: 45 On Thu, 31 Jan 2008 19:34:25 +0100 Sam Ravnborg wrote: > On Thu, Jan 31, 2008 at 09:48:01AM -0800, Arjan van de Ven wrote: > > On Thu, 31 Jan 2008 19:14:36 +0200 > > Adrian Bunk wrote: > > > > cpuhotplug is required for suspend/resume. > > > > > > Not on UP computers. > > > > > > > great! someone who still has one of those and uses a kernel without > > it. Can you look at your system.map and see how many kilobytes > > you've gained? Eg how many kilobytes are in these sections exactly? > I have one. A Atmel AT91 board equipped with an 9263. > So lets take a look at the defconfig build for the evaluation board. > > > o-arm/vmlinux.o: file format elf32-littlearm > > 0 .text 001cdefc 00000000 00000000 00000400 2**10 > 2 .init.text 000165e8 00000000 00000000 001ce6c0 2**5 > 26 .init.data 000032ec 00000000 00000000 002578cc 2**2 > > --- > > 4 .devinit.text 00001558 00000000 00000000 001e5270 2**2 > 9 .exit.text 00000bc8 00000000 00000000 001e8d2c 2**2 > 10 .cpuinit.text 00000924 00000000 00000000 001e98f4 2**2 > 11 .meminit.text 000004cc 00000000 00000000 001ea218 2**2 > 12 .devexit.text 00000160 00000000 00000000 001ea6e4 2**2 > 38 .cpuinit.data 00000040 00000000 00000000 0025afc0 2**2 > 39 .meminit.data 0000000c 00000000 00000000 0025b000 2**2 > > > __devinit alone gives a net win of 5464 bytes. > That is only ~3% of total .text size but this is non-swapable > memory where everything is worth it. now how much of this is lost again because you have to round the stuff to pagesize? -- 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/