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Added RPI4 install instructions
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Raspberry_Pi_4.md
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Raspberry_Pi_4.md
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## Kernel
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Follow the install instructions at the bottom of
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<https://archlinuxarm.org/platforms/armv8/broadcom/raspberry-pi-4#installation>
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and boot.
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Install linux-rpi as kernel and verify /boot/cmdline.txt to point to the right
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root device before rebooting.
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## Boot from USB drive
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The RPI4 supports booting from USB out of the box.
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Refer to <https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#usb-boot-modes>
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Most documentation assumes booting from mmcblk devices. Make sure you always
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point to the right devices or partitions, particularly in /boot/cmdline.txt
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and /etc/fstab.
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## Prefer AArch64 for high IO loads and out-of-memory issues
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The RPI4 has issues with a high IO load when running in 32-bit mode. Running
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AArch64 solves these. If you experience the oom-killer kicking in with no
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obvious memory hungry apps but high IO, then switch to AArch64.
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Sources:
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- <https://github.com/raspberrypi/linux/issues/3210#issuecomment-716510916>
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contains the hint to not use 32-bit.
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- <https://forums.raspberrypi.com/viewtopic.php?t=249924>
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- <https://forums.raspberrypi.com/viewtopic.php?t=67204>
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