1 files changed, 46 insertions, 0 deletions

diff --git a/main/mkinitfs/0001-mkinitfs-add-optional-support-for-pigz.patch b/main/mkinitfs/0001-mkinitfs-add-optional-support-for-pigz.patch
new file mode 100644
index 0000000000..9f73cf775a
--- /dev/null
+++ b/main/mkinitfs/0001-mkinitfs-add-optional-support-for-pigz.patch
@@ -0,0 +1,46 @@
+From 59204d36985de5ba2444d5f3e0d50a119287ec51 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?S=C3=B6ren=20Tempel?= <soeren+git@soeren-tempel.net>
+Date: Sat, 25 Jan 2020 12:04:32 +0100
+Subject: [PATCH] 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.
+---
+ mkinitfs.in | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/mkinitfs.in b/mkinitfs.in
+index 9bd95f9..9676fce 100755
+--- a/mkinitfs.in
++++ b/mkinitfs.in
+@@ -278,7 +278,7 @@ if [ -z "$list_sources" ] && [ -z "$quiet" ]; then
+ 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
+-- 
+2.26.2
+