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Few changes to the instructions how to compile a new kernel #1

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Few changes to the instructions how to compile a new kernel #1

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e26b70f
Change Section 2 text
halcon74 Sep 20, 2020
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Add Section 2.1
halcon74 Sep 20, 2020
dbdf88b
Rename Section 1.2 to 1.1
halcon74 Sep 20, 2020
2213790
Change Section 3 text
halcon74 Sep 20, 2020
3496fae
Add Sections 3.1 and 3.2
halcon74 Sep 20, 2020
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Change Section 4.1 text
halcon74 Sep 20, 2020
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Add Sections 4.1.1 and 4.1.2
halcon74 Sep 20, 2020
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Move Section 9 up (as Section 7)
halcon74 Sep 20, 2020
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Change Section 7 text
halcon74 Sep 20, 2020
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32 changes: 21 additions & 11 deletions usr/src/README
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Expand Up @@ -4,19 +4,29 @@ legend:
compile new kernel
1. mount "/boot/"

1.2. clean up "/boot/"
1.1. clean up "/boot/"

2. create a new symlink to the newest kernel source
2. check that /usr/src/linux points to the desired kernel version (USE flag 'symlink')

2.1. if not, create a new symlink to the desired kernel version
cd "/usr/src/"
ln --symbolic --force "linux-<new_kernel_version>-gentoo/" "linux"

3. copy the file ".config" file from the old kernel source to the newer one
cp "linux-<old_kernel_version>/.config" "linux/.config"
3. provide the file ".config" from the old kernel source to the newer one

3.1 or from the running kernel: zcat "/proc/config.gz" > "linux/.config"

3.2 or from a folder: cp "linux-<old_kernel_version>/.config" "linux/.config"

4. compile the new kernel

4.1. adapt new default values
make olddefconfig
4.1. get new values

4.1.1.or all by default:
make olddefconfig

4.1.2.or checking them all manually:
make oldconfig

4.2. compile the kernel and modules
make --jobs 4 --load-average 3.6 && make --jobs 4 --load-average 3.6 modules_install
Expand All @@ -41,16 +51,16 @@ compile new kernel

6.3. check, if the microcode was updated
dmesg | grep "microcode"

7. re-compile virtualbox and other modules for the new kernel:
emerge @module-rebuild

7. update the grub configuration:
8. update the grub configuration:
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grub-mkconfig --output="/boot/grub/grub.cfg"

8. use the new kernel:
9. use the new kernel:
reboot

9. re-compile virtualbox modules for the new kernel:
emerge @module-rebuild

10. clean up "/lib/modules/"

11. clean up "/usr/src/"
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