Comment # 15 on bug 1191322 from Sinisa Bandin

(In reply to Martin Wilck from comment #14)
> https://github.com/dracutdevs/dracut/pull/1841

Thanks!

It is working great!

/boot/initramfs-5.18.1-1.gd00e88d-default.img
/boot/initramfs-5.17.7-1.gc9a5fa1-default.img
/boot/initramfs-5.18.1-2.g0578d76-default.img
/boot/initramfs-5.16.15-2.g40a4b1d-default.img
/boot/initramfs-5.19.0-rc1-1.g515f42c-default.img

Without parallel:
real    0m43.247s
user    0m32.279s
sys     0m14.510s

With parallel:
real    0m6.568s
user    0m30.678s
sys     0m9.899s


I did seem to have a problem: old initramfs files were called "initrd-xxxxxx",
new ones are "initramffs-xxxxxxxx", but after I deleted all old files,
grub2-mkconfig correctly used new files. 

I have only had to change behavior when specifying "--regenerate-all" to always
assume "parallel", so the zypper initiated dracut also runs multiple jobs:

        --regenerate-all)
            case "$2" in
                "" | yes)
                    regenerate_all="parallel"   (instead of "yes")

I have no experience with github and would rather leave to somebody else to
make this change, if others find it useful.

Thanks!