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RIA77
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Joined: 24 Feb 2016
Posts: 342
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 Posted: Fri Nov 11, 2022 7:11 pm Post subject: How to make boot image of custom kernel |
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Hello, so here I am again.
How to make working image of compiled kernel ?
I made my changes to kernel.
| Quote: | genkernel --install --kernel-config=/usr/src/linux/linux-6.0.8-gentoo/.config initramfs
ERROR: Kernel Makefile (/usr/src/linux/Makefile) missing. Maybe re-install the kernel sources. |
Can't change default folder of /usr/src/linux.
Kernel folder is linux-6.0.8-gentoo.
Thank you. |
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CooSee
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Joined: 20 Nov 2004
Posts: 1438
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| Posted: Fri Nov 11, 2022 8:21 pm Post subject: |
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hello,
https://wiki.gentoo.org/wiki/Kernel/Configuration
| Code: | eselect kernel list
Available kernel symlink targets:
[1] linux-6.0.7-gentoo
[2] linux-6.0.8-gentoo * |
| Code: | | eselect kernel set 1 |
to, e.g. change to linux-6.0.7-gentoo
it seems that linux is a folder on your system - it should be a symlink wich points to the linux-6.0.8-gentoo folder 
| Code: | ls -la /usr/src/linux
lrwxrwxrwx 1 root root 20 Nov 11 18:19 /usr/src/linux -> linux-6.0.8-gentoo |
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Last edited by CooSee on Fri Nov 11, 2022 10:01 pm; edited 1 time in total |
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RIA77
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Joined: 24 Feb 2016
Posts: 342
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| Posted: Fri Nov 11, 2022 8:52 pm Post subject: |
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| Quote: | >> Pre-generating initramfs' /etc/ld.so.cache ...
* ERROR: None of the initramfs compression methods we tried are supported by your kernel (config file "/usr/src/linux/linux-6.0.8-gentoo/.config"), strange!?
* Please consult '/var/log/genkernel.log' for more information and any
* errors that were reported above.
*
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Changed compression methods many times. Allways the same message. Thank you. |
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RIA77
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CooSee
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| Posted: Fri Nov 11, 2022 9:21 pm Post subject: |
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| Code: | * Determining 'BEST' compression method for initramfs using kernel config '/usr/src/linux/linux-6.0.8-gentoo/.config' ...
* Checking if we can use 'XZ' compression ...
* Cannot use 'XZ' compression, kernel option 'CONFIG_RD_XZ' is not set!
* Checking if we can use 'LZMA' compression ...
* Cannot use 'LZMA' compression, kernel option 'CONFIG_RD_LZMA' is not set!
* Checking if we can use 'ZSTD' compression ...
* Cannot use 'ZSTD' compression, kernel option 'CONFIG_RD_ZSTD' is not set!
* Checking if we can use 'GZIP' compression ...
* Cannot use 'GZIP' compression, kernel option 'CONFIG_RD_GZIP' is not set!
* Checking if we can use 'BZIP2' compression ...
* Cannot use 'BZIP2' compression, kernel option 'CONFIG_RD_BZIP2' is not set!
* Checking if we can use 'LZO' compression ...
* Cannot use 'LZO' compression, the tool 'lzop' to compress initramfs was not found. Is app-arch/lzop installed?
* Checking if we can use 'LZ4' compression ...
* Cannot use 'LZ4' compression, the tool 'lz4' to compress initramfs was not found. Is app-arch/lz4 installed? |
you didn't set any of those above - set one or all if you want - for LZO and LZ4 you've install above mentioned ebuilds.
and look in /etc/genkernel.conf and set an option if you want and gekernel will choose accordingly.
| Code: | # Compress generated initramfs
COMPRESS_INITRD="yes"
# Types of compression: best, xz, lzma, bzip2, gzip, lzop, lz4, zstd, fastest
# "best" selects the best available compression method
# "fastest" selects the fastest available compression method
COMPRESS_INITRD_TYPE="best" |
when you're within menuconfig, type the slash / symbol key and search for CONFIG_RD_XZ and it'll show you the option and a number, e.g. 1 - after typing the number you go directly to this option and can activate whatever you need or want
https://wiki.gentoo.org/wiki/Kernel/Configuration#Search_modules
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RIA77
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Joined: 24 Feb 2016
Posts: 342
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| Posted: Fri Nov 11, 2022 10:17 pm Post subject: |
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| CooSee wrote: | | Code: | * Determining 'BEST' compression method for initramfs using kernel config '/usr/src/linux/linux-6.0.8-gentoo/.config' ...
* Checking if we can use 'XZ' compression ...
* Cannot use 'XZ' compression, kernel option 'CONFIG_RD_XZ' is not set!
* Checking if we can use 'LZMA' compression ...
* Cannot use 'LZMA' compression, kernel option 'CONFIG_RD_LZMA' is not set!
* Checking if we can use 'ZSTD' compression ...
* Cannot use 'ZSTD' compression, kernel option 'CONFIG_RD_ZSTD' is not set!
* Checking if we can use 'GZIP' compression ...
* Cannot use 'GZIP' compression, kernel option 'CONFIG_RD_GZIP' is not set!
* Checking if we can use 'BZIP2' compression ...
* Cannot use 'BZIP2' compression, kernel option 'CONFIG_RD_BZIP2' is not set!
* Checking if we can use 'LZO' compression ...
* Cannot use 'LZO' compression, the tool 'lzop' to compress initramfs was not found. Is app-arch/lzop installed?
* Checking if we can use 'LZ4' compression ...
* Cannot use 'LZ4' compression, the tool 'lz4' to compress initramfs was not found. Is app-arch/lz4 installed? |
you didn't set any of those above - set one or all if you want - for LZO and LZ4 you've install above mentioned ebuilds.
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Problem is that I selected.
[img]https://i.ibb.co/C1kZWLG/Screenshot-2022-11-12-04-11-26.png[/img] |
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CooSee
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Joined: 20 Nov 2004
Posts: 1438
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| Posted: Fri Nov 11, 2022 10:32 pm Post subject: |
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do you have app-arch/gzip emerged ?
emerge app-text/wgetpaste if not already emerged and
wgetpaste /usr/src/linux/.config and provide the given link here.
edit:
there's no need to use genkernel for kernel build - i use it only for building initramfs.
after .config file is configured via menuconfig or copying old .config to new sources directory and excuting make oldconfig & make clean.
| Code: | | time make -j8 && make -j8 modules_install && make install && cp .config /etc/kernels/kernel-config-6.0.8-gentoo-x86_64 |
and
| Code: | | genkernel --luks --lvm --btrfs --xfsprogs --kernel-config=/usr/src/linux/.config initramfs |
finally
| Code: | | grub-mkconfig -o /boot/grub/grub.cfg |
here's my .config for comparison only https://dpaste.com/CA5SF5X3E - please ignore the additional -1 in kernel name.
that's all
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" Die Realität ist eine Illusion, die durch Mangel an ehrlicher Kommunikation entsteht "
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" Der Mensch ist von Natur aus neugierig, was am Ende übrig bleibt ist die Gier " |
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RIA77
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Joined: 24 Feb 2016
Posts: 342
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| Posted: Sat Nov 12, 2022 9:57 am Post subject: |
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Hello, I have the same problem.
| Quote: | mfs: >> Initializing ...
* >> Appending devices cpio data ...
* >> Appending base_layout cpio data ...
* >> Appending util-linux cpio data ...
* >> Appending eudev cpio data ...
* >> Appending devicemanager cpio data ...
* >> Appending auxiliary cpio data ...
* >> Appending busybox cpio data ...
* >> Appending btrfs cpio data ...
* >> Appending luks cpio data ...
* >> Appending lvm cpio data ...
* >> Appending modprobed cpio data ...
* >> Appending xfsprogs cpio data ...
* >> Appending modules cpio data ...
* modules: 0 modules copied. Is that correct?
* >> Deduping cpio ...
* >> Pre-generating initramfs' /etc/ld.so.cache ..
None of the initramfs compression methods we tried are supported by your kernel (config file "/usr/src/linux/linux-6.0.8-gentoo/.config"), strange!?
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I have installed gzip, I got the same message. |
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CooSee
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Joined: 20 Nov 2004
Posts: 1438
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| Posted: Sat Nov 12, 2022 5:39 pm Post subject: |
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| Quote: | | * modules: 0 modules copied. Is that correct? |
something's odd with your config (no offence).
please upload your .config via https://wiki.gentoo.org/wiki/Wgetpaste.
e.g.
| Code: | | wgetpaste /usr/src/linux/.config |
and provide the given link in you answer.
have you ever used an editor to change some settings in your .config? - never ever edit this file by hand !
_________________
" Die Realität ist eine Illusion, die durch Mangel an ehrlicher Kommunikation entsteht "
---
" Der Mensch ist von Natur aus neugierig, was am Ende übrig bleibt ist die Gier " |
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NeddySeagoon
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Joined: 05 Jul 2003
Posts: 54234
Location: 56N 3W
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| Posted: Sat Nov 12, 2022 6:24 pm Post subject: |
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RIA77,
There are two different things here and they both need to be right at the same time.
First the kernel must be able to decompress the compressed initramfs.
That's the kerne CONFIG_RD_XZ', CONFIG_RD_LZMA and so on.
The one or ones you want to use must be built into the kernel.
That's just for decompression.
For compression, when the initrd is made, you need a user space tool that supports the compression system you want to use.
For a good experience, you need to use the same compression and decompression methods.
| Code: | * Checking if we can use 'LZO' compression ...
* Cannot use 'LZO' compression, the tool 'lzop' to compress initramfs was not found. Is app-arch/lzop installed?
* Checking if we can use 'LZ4' compression ...
* Cannot use 'LZ4' compression, the tool 'lz4' to compress initramfs was not found. Is app-arch/lz4 installed? |
Even if those packages were installed, without kernel support, it won't work end to end.
genkernel is being nice to you. It won't let you make a compressed initramfs that the kernel cannot decompress when the time comes.
If you do it yourself, there is no such check.
Do you need to rebuild your kernel with the correct decompression support?
Do you need to add user space compression tool support?
Maybe both?
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Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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RIA77
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Joined: 24 Feb 2016
Posts: 342
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| Posted: Mon Nov 14, 2022 6:23 pm Post subject: |
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| CooSee wrote: | | Quote: | | * modules: 0 modules copied. Is that correct? |
something's odd with your config (no offence).
please upload your .config via https://wiki.gentoo.org/wiki/Wgetpaste.
e.g.
| Code: | | wgetpaste /usr/src/linux/.config |
and provide the given link in you answer.
have you ever used an editor to change some settings in your .config? - never ever edit this file by hand !
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No offence here, everyone here are very nice.
http://dpaste.com/FDJ3QDTMU |
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RIA77
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Joined: 24 Feb 2016
Posts: 342
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| Posted: Tue Nov 15, 2022 10:41 pm Post subject: |
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| Quote: | ORTANT: config file '/etc/genkernel.conf' needs updating.
* See the CONFIGURATION FILES and CONFIGURATION FILES UPDATE TOOLS |
| Quote: | YOU ARE ABOUT TO UPDATE A MODIFIED FILE WHICH PROBABLY CONTAINS
* CUSTOM SETTINGS. YOU ARE FORCED TO UPDATE MANUALLY!
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What should I choose ?
Just updated genkernel and if there is a need to update genkernel.conf or not ?
Thank you. |
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CooSee
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Posts: 1438
Location: Earth
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| Posted: Thu Dec 01, 2022 3:02 pm Post subject: |
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my apologies for the loong delay - to much work at the end of this year.
| Quote: | | Just updated genkernel and if there is a need to update genkernel.conf or not ? |
the config file of genkernel was modified and portage asking if you want to replace with the config file from your emerge or ignore and keep the current one.
use etc-update or dispatch.conf.
look here https://wiki.gentoo.org/wiki/Handbook:X86/Portage/Tools
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" Der Mensch ist von Natur aus neugierig, was am Ende übrig bleibt ist die Gier " |
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