Re: [gentoo-user] multiple kernel configs
John Dangler wrote: I changed some options to the menuconfig (trying to get that splash to work), and saved the changes to an alternate config file. I'd like to make a kernel with _that_ config file and keep it separate from my default 2.6-r12 kernel, since, when the splash causes the panic, I have some way to get back in. How do I compile a new kernel that I can add to the grub.conf with the alternate config ? Just copy it in /boot with a different name, and add an entry in grub.conf for that. For future reference, I also always save the config files in a dedicated directory. Example (with a lot of fantasy, I name kernels using their version number, but that's of course just personal preference): # ls /boot 2.6.11.11 Sytem.map-2.6.11.11 This is where I save the configs (again, you might want to do it differently): # ls /root/conf 2.6.11.11.conf Relevant section of grub.conf: title 2.6.11.11 root (hd-whatever,n) kernel (hd-whatever,m)/2.6.11.11 root=/dev/hda3 Now suppose I want to do some tests with new features, so this is what I do: # cd /usr/src/linux # make mrproper(I think this is not strictly required, I usually do it) # make menuconfig (load the config file from /root/conf/2.6.11.11.conf, adjust what you want to change, and save the config back to /root/conf but with a different name to preserve the old one, e.g. /root/conf/2.6.11.11-newfeatures.conf Optionally you may also want to append an EXTRAVERSION to the kernel version - something that will show up when you do uname -a - IIRC there's now a dedicated menuconfig entry to do this, otherwise you can just edit the Makefile after menuconfig) # make make modules_install # cp arch/i386/boot/bzImage /boot/2.6.11.11-newfeatures (Optional, but I usually do this, expecially if I set the extraversion) # cp System.map /boot/System.map-2.6.11.11-newfeatures Edit grub.conf, and add a line like this after the existing one: title 2.6.11.11-newfeatures root (hd-whatever,n) kernel (hd-whatever,m)/2.6.11.11-newfeatures root=/dev/hda3 Reboot and you'll see both entries in the grub boot menu. Hope this helps. -- gentoo-user@gentoo.org mailing list
[gentoo-user] multiple kernel configs
I changed some options to the menuconfig (trying to get that splash to work), and saved the changes to an alternate config file. I'd like to make a kernel with _that_ config file and keep it separate from my default 2.6-r12 kernel, since, when the splash causes the panic, I have some way to get back in. How do I compile a new kernel that I can add to the grub.conf with the alternate config ? Thanks for the input John D -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] multiple kernel configs
John Dangler wrote: I changed some options to the menuconfig (trying to get that splash to work), and saved the changes to an alternate config file. I'd like to make a kernel with _that_ config file and keep it separate from my default 2.6-r12 kernel, since, when the splash causes the panic, I have some way to get back in. How do I compile a new kernel that I can add to the grub.conf with the alternate config ? The kernel config file used for compiling the kernel is called .config So, to compile a kernel with that config file, just replace the .config with your alternate file, saving the old .config of course if you want to keep it: mv .config my-old-config mv my-new-config .config (do this in the kernel source dir) You might have to call 'make clean' before you compile your new kernel, i'm not 100% sure on that -- it won't harm though. You can add as many kernels to your grub config as you like -- you might want to check with the install guide how to do that exactly: http://www.gentoo.org/doc/en/handbook/2005.1/handbook-x86.xml?part=1chap=10 Basically, your second kernel gets the same kind of entry just as your first, but you will want to change the title and of course the kernel (the root line should be the same as in the first block). Move your kernel under the name you specified to the same location where your other kernel is, using the name you specified in the config. (you will probably have to mount your /boot partition to do all this naturally) I.e. add an extra block something like this to your grub.conf: title=Gentoo Linux 2.6.11-r11 root (hd0,0) kernel /kernel-2.6.11-gentoo-r11 Marco -- gentoo-user@gentoo.org mailing list
RE: [gentoo-user] multiple kernel configs
Does the moving of the config files have any effect on the already compiled kernel? (I was under the impression that a .config _went with_ a specific build) or is that a throwback to too much time in a m$ environment? John D -Original Message- From: Marco Matthies [mailto:[EMAIL PROTECTED] Sent: Friday, August 19, 2005 9:46 PM To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] multiple kernel configs John Dangler wrote: I changed some options to the menuconfig (trying to get that splash to work), and saved the changes to an alternate config file. I'd like to make a kernel with _that_ config file and keep it separate from my default 2.6-r12 kernel, since, when the splash causes the panic, I have some way to get back in. How do I compile a new kernel that I can add to the grub.conf with the alternate config ? The kernel config file used for compiling the kernel is called .config So, to compile a kernel with that config file, just replace the .config with your alternate file, saving the old .config of course if you want to keep it: mv .config my-old-config mv my-new-config .config (do this in the kernel source dir) You might have to call 'make clean' before you compile your new kernel, i'm not 100% sure on that -- it won't harm though. You can add as many kernels to your grub config as you like -- you might want to check with the install guide how to do that exactly: http://www.gentoo.org/doc/en/handbook/2005.1/handbook-x86.xml?part=1chap=10 Basically, your second kernel gets the same kind of entry just as your first, but you will want to change the title and of course the kernel (the root line should be the same as in the first block). Move your kernel under the name you specified to the same location where your other kernel is, using the name you specified in the config. (you will probably have to mount your /boot partition to do all this naturally) I.e. add an extra block something like this to your grub.conf: title=Gentoo Linux 2.6.11-r11 root (hd0,0) kernel /kernel-2.6.11-gentoo-r11 Marco -- gentoo-user@gentoo.org mailing list -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] multiple kernel configs
John Dangler wrote: Does the moving of the config files have any effect on the already compiled kernel? (I was under the impression that a .config _went with_ a specific build) or is that a throwback to too much time in a m$ environment? the .config file determines how and especially which parts of the kernel are built by the kernel build environment -- the .config has no effect after the kernel has been built. a windows kernel will probably be built similarly, though who knows what happens in the kernel caverns of redmond... :) Marco -- gentoo-user@gentoo.org mailing list
