Booting RPi4 from USB MSD by 5.10
ryutaroh at ict.e.titech.ac.jp
Tue Jan 26 22:25:39 EST 2021
Just FYI, CONFIG_RESET_RASPBERRYPI=y seems necessary
when RPi4 is booted from USB MSD by the upstream kernel 5.10.x
CONFIG_RESET_RASPBERRYPI=m is insufficient.
When RPi4 is booted from an SD card,
also works well.
Related info: https://salsa.debian.org/kernel-team/linux/-/merge_requests/315
By the way, when 5.10 kernel is booted from USB MSD and udisks2 is
installed, kernel emits flood of false media change messages to udev,
and almost 100% of CPU usage is consumed by udev, dbus and udisks2
combined. I wonder if anyone other than me has experienced the same issue.
Bug report was filed to Debian as
Best regads, Ryutaroh Matsumoto
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