From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751738AbbCDVD7 (ORCPT ); Wed, 4 Mar 2015 16:03:59 -0500 Received: from mail.skyhub.de ([78.46.96.112]:42623 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750833AbbCDVD5 (ORCPT ); Wed, 4 Mar 2015 16:03:57 -0500 Date: Wed, 4 Mar 2015 22:02:43 +0100 From: Borislav Petkov To: Ingo Molnar Cc: x86-ml , Peter Zijlstra , Arnaldo Carvalho de Melo , Andy Lutomirski , lkml , Linus Torvalds Subject: Re: [GIT PULL] x86/alternatives padding Message-ID: <20150304210243.GH3516@pd.tnic> References: <20150303170632.GE25768@pd.tnic> <20150304073221.GD22014@gmail.com> <20150304112206.GB3516@pd.tnic> <20150304114151.GD3516@pd.tnic> <20150304202227.GA6826@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20150304202227.GA6826@gmail.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Mar 04, 2015 at 09:22:27PM +0100, Ingo Molnar wrote: > So you could have a look at the detailed section dump itself via: > > objdump -h vmlinux > > there .text will be the raw text and .alt* will be listed separately. > The 'size' tool will add up executable sections IIRC, mixing these > sections. Right. > .alt* is freed after init, so it's not really a kernel image size > increase, right? Exactly: void free_initmem(void) { free_init_pages("unused kernel", (unsigned long)(&__init_begin), (unsigned long)(&__init_end)); } which are: 69708: ffffffff81ee9000 0 NOTYPE GLOBAL DEFAULT 16 __init_begin 72679: ffffffff81ff9000 0 NOTYPE GLOBAL DEFAULT 25 __init_end and there's a bunch of stuff between ffffffff81ee9000 and ffffffff81ff9000: [Nr] Name Type Address Offset Size EntSize Flags Link Info Align [17] .init.text PROGBITS ffffffff81efe000 012fe000 0000000000066c98 0000000000000000 AX 0 0 16 [18] .init.data PROGBITS ffffffff81f65000 01365000 0000000000086d18 0000000000000000 WA 0 0 4096 [19] .x86_cpu_dev.init PROGBITS ffffffff81febd18 013ebd18 0000000000000018 0000000000000000 A 0 0 8 [20] .altinstructions PROGBITS ffffffff81febd30 013ebd30 0000000000007e4b 0000000000000000 A 0 0 1 [21] .altinstr_replace PROGBITS ffffffff81ff3b7b 013f3b7b 0000000000002044 0000000000000000 AX 0 0 1 [22] .iommu_table PROGBITS ffffffff81ff5bc0 013f5bc0 00000000000000c8 0000000000000000 A 0 0 8 [23] .apicdrivers PROGBITS ffffffff81ff5c88 013f5c88 0000000000000010 0000000000000000 WA 0 0 8 [24] .exit.text PROGBITS ffffffff81ff5c98 013f5c98 0000000000002412 0000000000000000 AX 0 0 1 -- Regards/Gruss, Boris. ECO tip #101: Trim your mails when you reply. --