?emerging "old" sources

dscha · n00b Joined: 06 Dec 2003 Posts: 35 Location: Austria

hello all!

a beginner question: have the gentoo-dev sources installed and the kernel ist running. for experimental reasons i would like to use the gentoo-sources based on 2.4 again.
my question: can i just emerge the sources, biuld the kernel and run in on the machine (so replacing a new kernel with an old one).
are there any files overwritten which might be 2.6 specific?

many regards for your help

dscha

NeddySeagoon · Posted: Wed Mar 03, 2004 10:55 pm Post subject:

dscha,

You can have both kernels and choose one at boot time.

When you copy your new bzImage file to /boot, rename it on the way.
In /boot/grub/grub.conf, create a new block beginning with the title line.
Use a title that means something to you and use the name if the new kernel in the boot line.

The only problem is with the /etc/modules/autoload file, which needs to be different between 2.4 and 2.6 kernels. You can put up with some error messages or do some manual module loading with modprobe.

The make modules_install will keep the modules for your kernels seperate in /lib/modules/<kernel_ver>
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NeddySeagoon

Computer users fall into two groups:-
those that do backups
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dscha · n00b Joined: 06 Dec 2003 Posts: 35 Location: Austria

many thanks for the info.

so can i also use the genkernel when i use the gentoo-sources? are the modules then still separated?
regarging autoload: so a backup would be possible and manual change when i change the kernel, is this right?

regards
dscha

NeddySeagoon · Posted: Wed Mar 03, 2004 11:26 pm Post subject:

dscha,

I'm not sure how genkernel names the kernel image files. As long as the old an new image are under different names there is no problem.
Your modules will still be kept seperate.

/etc/modules.autoload is a symbolic link to a file within /etc/modules.autoload.d, its not a file itself so you already have seperate autoload files for major kernel versions. You will forget (or not know) to change this link. Leave it set for the kernel you use most and put up with the error messages you get with the other kernel.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.

dscha · n00b Joined: 06 Dec 2003 Posts: 35 Location: Austria

ok, many thanks again!!!

regards

dscha

steel300 · Veteran Joined: 10 Jul 2003 Posts: 1155

The only problem you might have is if you're using nptl with the 2.6 kernel. The 2.4 series doesn't support nptl, so it won't boot.
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