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  1. Bug #1840945
  2. Comment #3

Comment 3 for bug 1840945

Revision history for this message
Alkis Georgopoulos (alkisg) wrote : Re: Concatenated lz4 initrds don't work

I tried all the COMPRESS= methods available in /etc/initramfs-tools/initramfs.conf in both eoan and bionic.

For each one, I ran:
date > date.txt
echo date.txt | cpio -oH newc > date.img
update-initramfs -u
cat initrd.lz4 date.img > initrd.img
kvm -m 512 -kernel vmlinuz -initrd initrd.img -append rdinit=/bin/sh

The results show that:
xz works in both eoan and bionic,
gzip and bzip2 regressed in eoan,
lzma, lzop and lz4 never worked.

=== EOAN ===
Linux kernel x86 boot executable bzImage, version 5.2.0-10-generic (buildd@lgw01-amd64-046) #11-Ubuntu SMP Tue Jul 30 19:19:46 UTC 2019, RO-rootFS, swap_dev 0x8, Normal VGA

SIZE FILENAME WORKS?
 9016056 vmlinuz
43335408 initrd.xz yes
43339869 initrd.lzma no date.txt
63081861 initrd.bzip2 no date.txt
68362761 initrd.lzop no date.txt
68364423 initrd.gzip no date.txt
77600825 initrd.lz4 kernel panic

=== BIONIC ===
Linux kernel x86 boot executable bzImage, version 4.15.0-58-generic (buildd@lcy01-amd64-013) #64-Ubuntu SMP Tue Aug 6 11:12:41 UTC 2019, RO-rootFS, swap_dev 0x7, Normal VGA

SIZE FILENAME WORKS?
 8302232 vmlinuz
39946592 initrd.xz yes
39942761 initrd.lzma no date.txt
56997316 initrd.bzip2 yes
61043794 initrd.lzop no date.txt
61046528 initrd.gzip yes