Bug#942144: Enable multithreading on xz compression

[Stefan Kühn <familiekuehn@arcor.de>]

Package: initramfs-tools-core
Version: 0.135
Severity: wishlist

Dear Maintainer,

maybe you can enable multithreading these days when the initrd is
compressed with xz. Multi cores are widespread and I use it for quite
some time. Also I use weaker compression level making it faster (and
using less memory) without affecting the size too much.

I just changed line 155 from

[ "${compress}" = xz ] && compress="xz --check=crc32"

to this one

[ "${compress}" = xz ] && compress="xz -1 --threads=0 --check=crc32"


Best regards
Stefan Kühn