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Equalize Dev/master branch #1317

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Equalize Dev/master branch #1317

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2c8c332
lz4 legacy format (Linux kernel compression)
Mar 11, 2017
8f6d671
doc lz4 -1 changed to lz4 -l
Mar 11, 2017
810cded
-l option explained
Mar 14, 2017
32efb52
Merge pull request #1243 from rear/master
gdha Mar 14, 2017
f2e9172
Add USB .hci_pci modules for broader hardware support
Mar 15, 2017
ff8c37d
Merge pull request #1235 from ProBackup-nl/patch-1
jsmeix Mar 16, 2017
973a423
Merge pull request #1236 from ProBackup-nl/patch-2
jsmeix Mar 16, 2017
166bf57
Merge pull request #1244 from ProBackup-nl/patch-4
jsmeix Mar 16, 2017
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4 changes: 4 additions & 0 deletions usr/share/rear/conf/GNU/Linux.conf
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Expand Up @@ -209,9 +209,13 @@ sr_mod
ide_cd
cdrom
uhci_hcd
uhci_pci
ehci_hcd
ehci_pci
xhci_hcd
xhci_pci
ohci_hcd
ohci_pci
zlib
zlib-inflate
zlib-deflate
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14 changes: 12 additions & 2 deletions usr/share/rear/conf/default.conf
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Expand Up @@ -1515,16 +1515,26 @@ UEFI_BOOTLOADER=""
# When booting on ppc64 with the yaboot bootloader the initrd must be less than 32MB
# so that in this case the lzma compression could be even required
# see https://github.com/rear/rear/issues/1142
# In genaral a smaller initrd is loaded faster by the ReaR rescue/recovery system bootloader
# In general a smaller initrd is loaded faster by the ReaR rescue/recovery system bootloader
# so that a small initrd could make the whole system recovery a bit faster.
# Except for lz4 which is ultra fast in decompressing.
# An example:
# extraction time creating initrd size
# ----- ------------------- --------------- --------------
# lz4 0.248s 4-5 seconds 64 MiB
# fast 3.111s 9 seconds 51 MiB
# lzma 6.775s 173 seconds 34 MiB
# ----- ------------------- --------------- --------------
# note: extraction time is an estimate, based on 'lsinitcpio -a' output
#
# With REAR_INITRD_COMPRESSION="fast"
# an initrd.cgz with gzip --fast compression is created (fast creating but less compression).
# With REAR_INITRD_COMPRESSION="best"
# an initrd.cgz with gzip --best compression is created (best gzip compression but slower creating).
# With REAR_INITRD_COMPRESSION="lzma"
# an initrd.xz with xz using the lzma compression is created (very best compression but very slow).
# With REAR_INITRD_COMPRESSION="lz4"
# an initrd.lz4 with lz4 default -1 compression is created (fast speed but less compression).
# an initrd.lz4 with lz4 -l compression is created (faster creating but less compression, compared to 'fast').
# An initrd.xz with lzma or lz4 compression may not work in this or that case.
# An initrd.xz with lzma or lz4 compression is known not to work together with DRLM prior to version 2.1.1
# see https://github.com/rear/rear/pull/1182#issuecomment-275423441
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7 changes: 4 additions & 3 deletions usr/share/rear/pack/GNU/Linux/900_create_initramfs.sh
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Expand Up @@ -16,10 +16,11 @@ pushd "$ROOTFS_DIR" >/dev/null
start_seconds=$( date +%s )
case "$REAR_INITRD_COMPRESSION" in
(lz4)
# Create initrd.lz4 with lz4 default -1 compression (fast speed but less compression)
# Create initrd.lz4 with lz4 -l compression (fast speed but less compression)
# -l = Legacy format (typically for Linux Kernel compression)
REAR_INITRD_FILENAME="initrd.lz4"
LogPrint "Creating recovery/rescue system initramfs/initrd $REAR_INITRD_FILENAME with lz4 compression"
if find . ! -name "*~" | cpio -H newc --create --quiet | lz4 > "$TMP_DIR/$REAR_INITRD_FILENAME" ; then
LogPrint "Creating recovery/rescue system initramfs/initrd $REAR_INITRD_FILENAME with lz4 -l compression"
if find . ! -name "*~" | cpio -H newc --create --quiet | lz4 -l > "$TMP_DIR/$REAR_INITRD_FILENAME" ; then
needed_seconds=$(( $( date +%s ) - start_seconds ))
LogPrint "Created $REAR_INITRD_FILENAME with lz4 compression ($( stat -c%s $TMP_DIR/$REAR_INITRD_FILENAME ) bytes) in $needed_seconds seconds"
else
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