Hi everybody,

I'm currently trying to rebuild the Linux Kernel with a pagesize of 16kb. But when booting the Raspberry Pi after adding the updated files to the SD card, nothing shows up on the screen.

The Hardware and Software I use:
- Raspberry Pi 4 Model B (https://www.raspberrypi.com/products...pecifications/) with 8GB of RAM
- I crosscompile it on a Ubuntu Machine (OS Jammy Jellyfish) following the instructions on this page: https://www.raspberrypi.com/document...ing-the-kernel
- The OS I originally flashed to the SD card for the Raspberry is "Raspberry PI OS (64-bit)". I also tried with "Raspberry PI OS Lite (64-bit)" but didn't make a difference in the final outcome.

For changing the config I call make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- menuconfig as described here: https://www.raspberrypi.com/document...ing-menuconfig. Then I choose Kernel Features -> Page size -> 16KB and save it and start the building process afterwards.

Are some further configuration modifications necessary for the modified kernel to work? As far as I've read the Arm Architecture should cope with pagesizes of 4kb, 16kb and 64kb.

Thanks for your help!

Hello, pingu123 & welcome to LQ.

The way to do this if at all possible is to compile on your target machine. Even LinuxFromScratch cross compiles a static system in the /tools directory, then chroots there and uses that to compile a complete system.

Unless you need a particular page size for some reason, leave good enough alone. You'll have enough issues to worry about.

Hi business_kid,

Thanks for your answer! Yeah, it is evident to change it. I built the kernel on the board, didn't work either. So might it be a HW problem that the Raspi doesn't support it?

Thanks and cheers,
pingu123

Probably. It's just two ICs with everything packed in. People say 'compatible' but no extensive testing on how compatible has been done. And there's often patches needed in order to compile on Arm. It's just making extra trouble for yourself. What's the benefit of the various page sizes?

Hey, it finally worked with 64kb. It is necessary to check for the specific ARM CPU (for the Raspberry Pi 4 it would be the following: https://en.wikipedia.org/wiki/ARM_Cortex-A72), to see which page sizes are actually supported

Ok. Glad you're sorted. Why were you farting about with page sizes anyhow. I saw page sizes as a matter of low importance.

Yeah I just had a specific FS that had that constraint, that's why ^^