Created attachment 853945 [details]
possibly relevant was an occasional page allocation failure

I am really clueless as to what causes this, couldn't yet figure by looking at
previous logs;

When it starts it goes out like the following:

Nov 15 11:24:53 localhost kernel: i2c-bcm2835 3f805000.i2c: i2c transfer timed
out
Nov 15 11:25:04 localhost kernel: i2c-bcm2835 3f805000.i2c: i2c transfer timed
out
Nov 15 11:25:05 localhost kernel: i2c-bcm2835 3f805000.i2c: i2c transfer timed
out
Nov 15 11:25:16 localhost kernel: i2c-bcm2835 3f805000.i2c: i2c transfer timed
out
Nov 15 11:25:28 localhost kernel: i2c-bcm2835 3f805000.i2c: i2c transfer timed
out
Nov 15 11:25:29 localhost kernel: i2c-bcm2835 3f805000.i2c: i2c transfer timed
out
Nov 15 11:25:40 localhost kernel: i2c-bcm2835 3f805000.i2c: i2c transfer timed
out
Nov 15 11:25:52 localhost kernel: i2c-bcm2835 3f805000.i2c: i2c transfer timed
out
Nov 15 11:25:53 localhost kernel: i2c-bcm2835 3f805000.i2c: i2c transfer timed
out
Nov 15 11:26:04 localhost kernel: i2c-bcm2835 3f805000.i2c: i2c transfer timed
out

In this particular case the host was mostly idle and the latest log message
preceding the errors happened 42 seconds before and it was a very low intensity
[Info].

It usually starts after some hours after the SoC has booted and then sticks
until the next reboot at that rate.

The only other issue I saw on the log I considered possibly relevant was an
occasional page allocation failure showing at pageallocationfailure.txt:185.

The only devices attached to the Raspberry are the SD card, an USB flash drive
and the Ethernet cable, and occasionally a case fan.

There these two related project issues are similar similar bug in some random
repository but nothing I tried from there seemed to fix it.

https://github.com/raspberrypi/linux/issues/3064

https://github.com/PiSupply/PiJuice/issues/634

It's currently running VERSION_ID="20211117" with only default repos which are
oss and update.

Linux localhost 5.14.14-3-default #1 SMP Thu Oct 21 05:05:03 UTC 2021 (2b5383f)
aarch64 aarch64 aarch64 GNU/Linux

What else can I provide?

Have a good one