From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030650AbXDJWhE (ORCPT ); Tue, 10 Apr 2007 18:37:04 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030651AbXDJWhD (ORCPT ); Tue, 10 Apr 2007 18:37:03 -0400 Received: from tomts43-srv.bellnexxia.net ([209.226.175.110]:45256 "EHLO tomts43-srv.bellnexxia.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030650AbXDJWhA (ORCPT ); Tue, 10 Apr 2007 18:37:00 -0400 Date: Tue, 10 Apr 2007 18:36:58 -0400 From: Mathieu Desnoyers To: Andrew Morton Cc: linux-kernel@vger.kernel.org Subject: [PATCH] markers-linker-generic Message-ID: <20070410223658.GC7092@Krystal> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Disposition: inline X-Editor: vi X-Info: http://krystal.dyndns.org:8080 X-Operating-System: Linux/2.4.34-grsec (i686) X-Uptime: 18:27:58 up 67 days, 12:35, 5 users, load average: 1.36, 1.43, 1.54 User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Defines the linker marcro EXTRA_RWDATA for marker data section. It puts the marker data in a separate section that will not pollute the normal .data section, which minimize the cache impact. Markers need such a special section because they define a lot of spreaded and small data structures at multiple sites. This patch also creates the __markers_strings section (ro marker strings) and makes sure the __markers section is aligned by putting it before the __ksymtab_strings (not after). It applies on 2.6.21-rc6-mm1. Signed-off-by: Mathieu Desnoyers --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -116,21 +116,19 @@ *(__kcrctab_gpl_future) \ VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \ } \ - \ - /* Kernel symbol table: strings */ \ - __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ - *(__ksymtab_strings) \ - } \ /* Kernel markers : pointers */ \ - .markers : AT(ADDR(.markers) - LOAD_OFFSET) { \ + __markers : AT(ADDR(__markers) - LOAD_OFFSET) { \ VMLINUX_SYMBOL(__start___markers) = .; \ - *(.markers) \ + *(__markers) \ VMLINUX_SYMBOL(__stop___markers) = .; \ } \ - .markers.c : AT(ADDR(.markers.c) - LOAD_OFFSET) { \ - VMLINUX_SYMBOL(__start___markers_c) = .; \ - *(.markers.c) \ - VMLINUX_SYMBOL(__stop___markers_c) = .; \ + /* Kernel symbol table: strings */ \ + __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ + *(__ksymtab_strings) \ + } \ + /* Kernel markers : strings */ \ + __markers_strings : AT(ADDR(__markers_strings) - LOAD_OFFSET) { \ + *(__markers_strings) \ } \ __end_rodata = .; \ . = ALIGN(4096); \ @@ -147,6 +145,10 @@ \ . = ALIGN(4096); +#define EXTRA_RWDATA \ + . = ALIGN(8); \ + *(__markers_data) \ + #define SECURITY_INIT \ .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ VMLINUX_SYMBOL(__security_initcall_start) = .; \ @@ -263,4 +265,3 @@ *(.initcall6s.init) \ *(.initcall7.init) \ *(.initcall7s.init) - -- Mathieu Desnoyers Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68