From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755018Ab1HGUCi (ORCPT ); Sun, 7 Aug 2011 16:02:38 -0400 Received: from oproxy8-pub.bluehost.com ([69.89.22.20]:34019 "HELO oproxy8-pub.bluehost.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1754687Ab1HGUCi convert rfc822-to-8bit (ORCPT ); Sun, 7 Aug 2011 16:02:38 -0400 Date: Sun, 7 Aug 2011 13:02:36 -0700 From: Randy Dunlap To: Amirali Shambayati Cc: Linux Kernel , kernelnewbies@kernelnewbies.org Subject: Re: Compile kernel for various times and problem of too long time consuming Message-Id: <20110807130236.6ec8acb6.rdunlap@xenotime.net> In-Reply-To: References: <20110807110429.57161269.rdunlap@xenotime.net> Organization: YPO4 X-Mailer: Sylpheed 2.7.1 (GTK+ 2.16.6; x86_64-unknown-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT X-Identified-User: {1807:box742.bluehost.com:xenotime:xenotime.net} {sentby:smtp auth 50.53.38.135 authed with rdunlap@xenotime.net} Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 8 Aug 2011 00:18:04 +0430 Amirali Shambayati wrote: > Would you say how you rebuild kernel? Sure, it's just a 'make' command: $ make -j4 ARCH=i386 O=X32 all > On Sun, Aug 7, 2011 at 10:34 PM, Randy Dunlap wrote: > > On Sun, 7 Aug 2011 21:39:12 +0430 Amirali Shambayati wrote: > > > >> Hi all, > >> Since I want to evaluate performance improvements by changing just one > >> file in kernel(noop-iosched) and compiling kernel is too much > >> time-consuming, I want to know that if I compile kernel for more than > >> one time, does it take similar time to first time? > >> > >> I use following commands. If I don't use "make-kpkg clean" for next > >> times, does it just compile the files which have been modified or it > >> compile whole kernel package again? > >> > >> make-kpkg clean > >> fakeroot make-kpkg --initrd --append-to-version=-some-string-here > >> kernel-image kernel-headers > > > > Since I never use make-kpkg, I can only tell you that when I modified > > block/noop-iosched.c and rebuilt the kernel, here is what was rebuilt: > > > >  GEN     /lnx/src/NEXT/linux-next-20110805/X32/Makefile > >  CHK     include/linux/version.h > >  Using /lnx/src/NEXT/linux-next-20110805 as source for kernel > >  CHK     include/generated/utsrelease.h > >  CALL    /lnx/src/NEXT/linux-next-20110805/scripts/checksyscalls.sh > >  CHK     include/generated/compile.h > >  CHK     kernel/config_data.h > >  CC      block/noop-iosched.o > >  LD      block/built-in.o > >  LD      vmlinux.o > >  MODPOST vmlinux.o > >  GEN     .version > >  CHK     include/generated/compile.h > >  UPD     include/generated/compile.h > >  CC      init/version.o > >  LD      init/built-in.o > >  LD      .tmp_vmlinux1 > >  KSYM    .tmp_kallsyms1.S > >  AS      .tmp_kallsyms1.o > >  LD      .tmp_vmlinux2 > >  KSYM    .tmp_kallsyms2.S > >  AS      .tmp_kallsyms2.o > >  LD      vmlinux > >  SYSMAP  System.map > >  SYSMAP  .tmp_System.map > >  Building modules, stage 2. > >  VOFFSET arch/x86/boot/voffset.h > >  CC      arch/x86/boot/version.o > >  OBJCOPY arch/x86/boot/compressed/vmlinux.bin > >  LZMA    arch/x86/boot/compressed/vmlinux.bin.lzma > >  MODPOST 575 modules > >  MKPIGGY arch/x86/boot/compressed/piggy.S > >  AS      arch/x86/boot/compressed/piggy.o > >  LD      arch/x86/boot/compressed/vmlinux > >  ZOFFSET arch/x86/boot/zoffset.h > >  OBJCOPY arch/x86/boot/vmlinux.bin > >  AS      arch/x86/boot/header.o > >  LD      arch/x86/boot/setup.elf > >  OBJCOPY arch/x86/boot/setup.bin > >  BUILD   arch/x86/boot/bzImage > > Setup is 14972 bytes (padded to 15360 bytes). > > System is 1287 kB > > CRC 64ecf4d > > Kernel: arch/x86/boot/bzImage is ready  (#18) > > > > > > so it's a minimal rebuild, not a full kernel rebuild. --- ~Randy *** Remember to use Documentation/SubmitChecklist when testing your code ***