[Bug 1488620] Re: Add LZ4 support

[Julian Andres Klode]

Should we use zstd instead? Compression time is about the same as lz4,
but size is much smaller (49MB instead of 75MB for me). Not sure about
decompression support.

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Title:
  Add LZ4 support

Status in initramfs-tools package in Ubuntu:
  Triaged

Bug description:
  I found that I could enable LZ4 compression for initramfs on my vivid
  machine by installing liblz4-tool package, adding one line to
  mkinitramfs and installing a kernel compiled with CONFIG_CRYPTO_LZ4=y.

  Please include support for (legacy) LZ4.

  Attached patch includes changes made to the latest version (initramfs-
  tools_0.120ubuntu3).

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