mount: uknown file system type "ext4" - always after kernel compiled

[bryn1u]

Hey guys,

I don't understand why after kernel compilation, im always getting error like on screenshot below.

centos.png (41.53 KiB) Viewed 551 times

Im using exaclly the same config as centos uses. I just copied from /boot/config.... to the kernel sources. After all i just type "make -j8 rpm-pkg". Packages are build fine the same with installation. After reboot i've been dropped to the dracut. Someone can tell me where problem is ?

Thanks.

[TrevorH]

I just copied from /boot/config.... to the kernel sources

To what file exactly?

[bryn1u]

[root@ns3030517 kernels]# cp /boot/config-3.10.0-957.1.3.el7.x86_64 /usr/src/kernels/linux-4.19.9/.config
[root@ns3030517 kernels]#

[hunter86_bg]

Your initramfs doesn't have the kernel module for ext4.
First, use a CentOS full DVD and use troubleshooting , then mount your system disks, then mount the following directories over the mount point.
Should be something like this:
1. The system mounted your disk on /sysroot
2. Check if your '/dev/your/harddrive-partition1' is mounted to '/sysroot/boot'
3. Mount FS from rescue image to respective locations:

Code: Select all

for i in /proc /dev /sys /run /tmp; do mount -o bind $i "/sysroot${i}" ; done

4. Chroot into sysroot and rebuild the initramfs(you might select only 1 kernel)

Code: Select all

chroot /sysroot
dracut -f --regenerate-all

5.Use 'lsinitrd' to verify that ext4 kernel module is inside the new image.
6. Reboot


If the system boots, then you will know the exact reason and you will have to investigate what caused it.