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dpaddy
Apprentice
Joined: 25 Jun 2008
Posts: 168
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 Posted: Sun Mar 09, 2025 12:18 am Post subject: [SOLVED] make oldconfig |
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I am attempting a new install (on an old system) using /dev/sda3 as is recommended by the handbook. That old system's disk is mounted (on the new install which I am in the process of completing -- I want to build a custom kernel for it) at /mnt/black (on /dev/sda3). I therefore have access to the old system's configuration files: | Code: | ls -al /mnt/black/boot/
total 49236
drwxr-xr-x 6 root root 4096 Dec 31 1969 .
drwxr-xr-x 20 root root 4096 Mar 8 08:48 ..
drwxr-xr-x 4 root root 4096 Sep 4 2020 EFI
-rwxr-xr-x 1 root root 2748511 Sep 4 2020 System.map-4.11.6-gentoo
-rwxr-xr-x 1 root root 3492477 Dec 15 2020 System.map-5.4.60-gentoo
-rwxr-xr-x 1 root root 3477974 Sep 15 2020 System.map-5.4.60-gentoo.old
-rwxr-xr-x 1 root root 31744 Sep 4 2020 amd-uc.img
-rwxr-xr-x 1 root root 95704 Sep 4 2020 config-4.11.6-gentoo
-rwxr-xr-x 1 root root 120351 Dec 15 2020 config-5.4.60-gentoo
-rwxr-xr-x 1 root root 123527 Sep 15 2020 config-5.4.60-gentoo.old
drwxr-xr-x 5 root root 4096 Sep 15 2020 grub
-rwxr-xr-x 1 root root 10026211 Dec 15 2020 initramfs-5.4.60-gentoo.img
-rwxr-xr-x 1 root root 10007407 Sep 15 2020 initramfs-5.4.60-gentoo.img.old
drwxr-xr-x 2 root root 4096 Sep 4 2020 lost+found
drwxr-xr-x 2 root root 4096 Sep 5 2020 save
-rwxr-xr-x 1 root root 5919280 Sep 4 2020 vmlinuz-4.11.6-gentoo
-rwxr-xr-x 1 root root 7168896 Dec 15 2020 vmlinuz-5.4.60-gentoo
-rwxr-xr-x 1 root root 7148416 Sep 15 2020 vmlinuz-5.4.60-gentoo.old
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I desire to build my custom kernel (for the new install) based upon the kernel configuration of the old system. I realize that executed in /usr/src/linux on /dev/sda3 is inappropriate because I must somehow specify where the old configuration file is located (which I presume to be /mnt/black/boot/config-5.4.60-gentoo). How exactly -- please be painfully explicit because I am easily confused -- do I proceed? I expect that simply copying /mnt/black/boot/config-5.4.60-gentoo to /usr/src/linux is naive because it should perhaps be renamed to something in particular in order for to succeed in the manner desired. Or that approach (copy and rename) might also be naive because some other method is appropriate. Moreover | Code: | ls -l ../
total 8
lrwxrwxrwx 1 root root 20 Mar 8 18:00 linux -> linux-6.12.16-gentoo
drwxr-xr-x 27 root root 4096 Mar 8 18:22 linux-6.12.16-gentoo
drwxr-xr-x 26 root root 4096 Mar 8 17:27 linux-6.12.16-gentoo-dist |
shows the new kernel I want to customize is 6.12.16 whereas the old is 5.4.60 and I am concerned that the age difference may be problematic. Also -- in case it may somehow matter -- both new and old kernel sources were emerged with the experimental use flag (so as to have access to zen optimization). Please help.
Last edited by dpaddy on Sun Mar 09, 2025 2:19 am; edited 1 time in total |
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Ralphred
l33t
Joined: 31 Dec 2013
Posts: 744
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| Posted: Sun Mar 09, 2025 1:46 am Post subject: Re: make oldconfig |
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| dpaddy wrote: | | I expect that simply copying /mnt/black/boot/config-5.4.60-gentoo to /usr/src/linux is naive |
Not as much as you'd think, just | Code: | | cp /mnt/black/boot/config-5.4.60-gentoo /usr/src/linux/.config |
| dpaddy wrote: | | I am concerned that the age difference may be problematic. |
Other than a long list of questions to answer, I've never had problems using "really old configs". If make oldconfig does "give up" (and start with defconfig instead of the config you want) there are plenty of versions between 5.4 and 6.12 in portage to make the steps smaller, but I don't think you'll need them. |
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dpaddy
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Joined: 25 Jun 2008
Posts: 168
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| Posted: Sun Mar 09, 2025 2:19 am Post subject: |
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| I'll give it a go. Thanks. |
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pietinger
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Joined: 17 Oct 2006
Posts: 5478
Location: Bavaria
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Installing Gentoo
