operating-system: OS 5.9: Raspberry pi 3 freezes, zram decompression failed

Hardware Environment

• Raspberry Pi 3

Home Assistant OS release:

• Updated from version 5.8
• Additional information:

arch: armv7
channel: stable
docker: 19.03.13
features:
- reboot
- shutdown
- services
- network
- hostname
- hassos
hassos: "5.9"
homeassistant: 2020.12.1
hostname: hassio
logging: info
machine: raspberrypi3
operating_system: Home Assistant OS 5.9
supervisor: 2020.12.7
supported: true
supported_arch:
- armv7
- armhf
timezone: Europe/Berlin

Supervisor logs:

supervisor_log.txt

Kernel logs:

kernel_log.txt

Description of problem:

Occasionally, the Raspberry Pi freezes completely (even the numlock LED ceases to work on a local USB keyboard) and requires a power cycle. Also, with heavy use, processes occasionally terminate unexpectedly.

This problem has started either with Home Assistant OS Release-5 build 9 or build 8. The full freeze first occurred on build 9 for me, but the crash of a docker container’s process might have also happened before. I had been operating this setup with stable HA OS releases for more than a year now without any of these problems.

Error messages related to the zram appear in the kernel log and on the local console:

[ 1472.597586] zram: Decompression failed! err=-22, page=32663
[ 1472.597883] zram: Decompression failed! err=-22, page=32663
[ 1472.598047] Read-error on swap-device (254:0:261304)
[ 1590.459156] zram: Decompression failed! err=-22, page=10855
[ 1590.459375] zram: Decompression failed! err=-22, page=10855
[ 1590.459474] Read-error on swap-device (254:0:86840)
[ 1735.075095] zram: Decompression failed! err=-22, page=5410

Additional remarks: This problem might to be related to the current Linux kernel and could affect a number of arm devices. According to this email, disabling the CONFIG_ZSMALLOC_PGTABLE_MAPPING in the Linux kernel config may resolve the problem: https://www.spinics.net/lists/stable/msg428110.html