Package: initramfs-tools-core
Version: 0.136
Severity: wishlist
Tags: patch
Hello,
there are Kernelpatches for zstandard initramfs support
available for several years, and will hopefully accepted
upstream soon.
Please enable support for this compression.
The patch should be simple enough, I chosen to try zstd
as first decompressor because it supports a whole
range of formats on debian.
-- System Information:
Debian Release: bullseye/sid
APT prefers testing
APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 5.4.0-4-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8),
LANGUAGE=en_GB:en (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages initramfs-tools-core depends on:
ii coreutils 8.30-3+b1
ii cpio 2.13+dfsg-2
ii e2fsprogs 1.45.6-1
ii klibc-utils 2.0.7-1
ii kmod 27-2
ii logsave 1.45.6-1
ii udev 244.3-1
Versions of packages initramfs-tools-core recommends:
ii busybox 1:1.30.1-4
ii pigz 2.4-1+b1
Versions of packages initramfs-tools-core suggests:
ii bash-completion 1:2.10-1
-- Configuration Files:
/etc/initramfs-tools/initramfs.conf changed [not included]
-- no debconf information
diff -burN initramfs-tools.org/conf/initramfs.conf
initramfs-tools/conf/initramfs.conf
--- initramfs-tools.org/conf/initramfs.conf 2019-02-06 00:55:47.000000000
+0100
+++ initramfs-tools/conf/initramfs.conf 2020-03-31 18:38:48.558687968 +0200
@@ -38,7 +38,7 @@
KEYMAP=n
#
-# COMPRESS: [ gzip | bzip2 | lz4 | lzma | lzop | xz ]
+# COMPRESS: [ gzip | bzip2 | lz4 | lzma | lzop | zstd | xz ]
#
COMPRESS=gzip
diff -burN initramfs-tools.org/mkinitramfs initramfs-tools/mkinitramfs
--- initramfs-tools.org/mkinitramfs 2020-01-18 19:36:00.000000000 +0100
+++ initramfs-tools/mkinitramfs 2020-03-31 18:31:31.046107765 +0200
@@ -185,6 +185,7 @@
fi
;;
lz4) compress="lz4 -9 -l" ;;
+zstd) compress="zstd -19" ;;
xz) compress="xz --check=crc32"
# If we're not doing a reproducible build, enable multithreading
test -z "${SOURCE_DATE_EPOCH}" && compress="$compress --threads=0"
diff -burN initramfs-tools.org/unmkinitramfs initramfs-tools/unmkinitramfs
--- initramfs-tools.org/unmkinitramfs 2019-07-31 16:25:58.000000000 +0200
+++ initramfs-tools/unmkinitramfs 2020-03-31 18:36:36.821308275 +0200
@@ -29,7 +29,9 @@
dir="$2"
shift 2
- if gzip -t "$archive" >/dev/null 2>&1 ; then
+ if zstd -q -c -t "$archive" >/dev/null 2>&1 ; then
+ zstd -q -c -d "$archive"
+ elif gzip -t "$archive" >/dev/null 2>&1 ; then
gzip -c -d "$archive"
elif xzcat -t "$archive" >/dev/null 2>&1 ; then
xzcat "$archive"
