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The /boot partition is by default only 41 MiB in size, which is not enough when having this kernel installed in parallel.
Whenever update-initramfs needs to run, it will complain that not enough disk space is available on /boot (to create a backup of the current initramfs image). This happens even without updating the kernel via apt, for example on updates to the initramfs-tools package. So it has to be resolved.
As a workaround, it is possible to free up enough space by removing the files /boot/kernel.img and /boot/kernel7.img. These are the default Raspberry Pi 1 / 2 resp. Raspberry Pi 3 kernels, not used as we configured kernel=vmlinuz-4.14.14-rt10-v7 in /boot/config.txt. The files belong to package raspberrypi-kernel, which we (probably) can't uninstall as it also contains several firmware images etc. in /boot.
As a proper solution, the /boot partition should simply be made larger right from the start.
The text was updated successfully, but these errors were encountered:
There is an issue with the instructions to install the PREEMPT_RT Linux kernel on a Raspberry Pi 3:
The
/boot
partition is by default only 41 MiB in size, which is not enough when having this kernel installed in parallel.Whenever
update-initramfs
needs to run, it will complain that not enough disk space is available on/boot
(to create a backup of the current initramfs image). This happens even without updating the kernel viaapt
, for example on updates to theinitramfs-tools
package. So it has to be resolved.As a workaround, it is possible to free up enough space by removing the files
/boot/kernel.img
and/boot/kernel7.img
. These are the default Raspberry Pi 1 / 2 resp. Raspberry Pi 3 kernels, not used as we configuredkernel=vmlinuz-4.14.14-rt10-v7
in/boot/config.txt
. The files belong to packageraspberrypi-kernel
, which we (probably) can't uninstall as it also contains several firmware images etc. in/boot
.As a proper solution, the
/boot
partition should simply be made larger right from the start.The text was updated successfully, but these errors were encountered: