lz4 compression for mx

[Richard]

@stsoh,
Thanks for the params.

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mksq_opt=-comp lz4 -Xhc

I´ll give these a try. I had the order wrong.

[skidoo]

The Liquorix kernels we've been porting have used lz4 since 4.12. I'm not sure what this means in the Debian kernel changelog, but we have it in the 4.14 and 4.15 ports we've also done:

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  * Enable SQUASHFS_LZ4 in default config.

Although it's enabled in the kernel configuration, debian's mkinitramfs command doesn't support lz4
https://sources.debian.org/src/initramf ... amfs.conf/ # COMPRESS: [ gzip | bzip2 | lzma | lzop | xz ]

The mkinitcpio command (used by some other distros, e.g. Arch Linux) does support creation of an lz4 -packed [initrd|initramfs]
but the benefit is miniscule ~~ shaves 150 milliseconds from the time required to unpack the initramfs.
(This micro-optimization is probably only significant in the realm of cloud computing ~~ creating/destroying container instances a from memory-resident "master" copy)

https://wiki.archlinux.org/index.php/Mk ... OMPRESSION
The kernel supports several formats for compression of the initramfs—gzip, bzip2, lzma, xz (also known as lzma2), lzo, and lz4.
For most use cases, gzip, lzop, and lz4 provide the best balance of compressed image size and decompression speed.
The provided mkinitcpio.conf has the various COMPRESSION options commented out. Uncomment one to choose which compression format you desire.

[stsoh]

.......Although it's enabled in the kernel configuration, debian's mkinitramfs command doesn't support lz4.....

to activate lz4, edit /etc/initramfs-tools/modules and add these at eol:

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lz4
lz4_compress
zbud

open terminal:

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sudo modprobe -v lz4
sudo update-initramfs -u
sudo reboot