Comment 2 for bug 1950214

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Dave Jones (waveform) wrote : Re: raspi 64 bit Impish image can't 'apt upgrade' without adding swap on pi zero 2

This is down to initramfs-tools switching to zstd by default, which has such huge memory requirements that it gets killed by OOM on the Zero 2 (and presumably the 3A+?) which only has 512MB of RAM. The default should be switched back to lz4, at least on the Pi images.

Note to self: add a test for update-initramfs -u to the ISO tracker for the Pi server images to ensure it gets tested across the platforms.