ref: 59204d36985de5ba2444d5f3e0d50a119287ec51
parent: 961726b6aeb8e12176009675f22ed0ffc2b26e14
author: Sören Tempel <soeren+git@soeren-tempel.net>
date: Sat Jan 25 06:04:32 CST 2020
mkinitfs: add optional support for pigz pigz(1) is a parallel gzip implementation. As such, it significantly faster than gzip(1). This patch uses pigz(1) instead of gzip(1), if it is installed, otherwise it just falls back to gzip(1). This is similar to the current pigz support in abuild. Without this patch: $ time mkinitfs ==> initramfs: creating /boot/initramfs-lts real 0m 38.19s user 0m 35.47s sys 0m 0.49s With this patch applied and pigz installed: ==> initramfs: creating /boot/initramfs-lts real 0m 13.24s user 0m 38.30s sys 0m 0.56s This change was discussed on IRC with _ikke_ and mps.
--- a/mkinitfs.in
+++ b/mkinitfs.in
@@ -278,7 +278,7 @@
fi
case "$initfscomp" in
- gzip) comp="gzip -9" ;;
+ gzip) comp="$(command -v pigz 2>/dev/null || echo gzip) -9" ;;
xz) cmd_exists xz; comp="xz -C crc32 -T 0" ;;
*) echo "Initramfs compression \"$initfscomp\" not supported!"; exit 1 ;;
esac