Bug#989143: initramfs-tools: doesn’t actually compress with zstd

[Christoph Anton Mitterer]

Control: tags -1 - moreinfo

On Mon, 2021-05-31 at 11:08 +0200, Nicolas Schier wrote:
> To validate my argumentation, 
> please set 'COMPRESS=gzip' in '/etc/initramfs-tools/initramfs.conf', 
> run 'update-initramfs -u' again and compare the sizes of the
> (probably) 
> zstd-compressed one with the gzip-compressed one.

That gives:

With zstd:
# file initrd*
initrd.img-5.10.0-7-amd64: ASCII cpio archive (SVR4 with no CRC)

# l initrd*
-rw-r--r-- 1 root root 26M May 30 06:21 initrd.img-5.10.0-7-amd64


Changing to gzip:
# update-initramfs -u
...


# file initrd*
initrd.img-5.10.0-7-amd64: ASCII cpio archive (SVR4 with no CRC)

# l initrd*
-rw-r--r-- 1 root root 33M May 31 15:54 initrd.img-5.10.0-7-amd64


Cheers,
Chris.