Bug 803929

Summary:	grub2 can't read btrfs-lzo compressed files
Product:	[Fedora] Fedora	Reporter:	Paul Alesius <Paul>
Component:	grub2	Assignee:	Peter Jones <pjones>
Status:	CLOSED NEXTRELEASE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	16	CC:	bcl, dennis, mads, pjones
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2012-04-17 23:14:18 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description Paul Alesius 2012-03-16 02:24:02 UTC

Description of problem:
grub2 in fedora 16 does not support lzo and fails to boot if /boot is on btrfs and compressed with lzo (Such as in the case where you have just / and no separate /boot.


How reproducible:
Always


Steps to Reproduce:
1. Install using btrfs as /, no separate /boot
2. edit /etc/fstab and add compress=lzo to /, reboot or mount -o remount / for changes to take effect.
3. Edit grub files in /boot, such as mkconfig -o /boot/grub2/grub.conf
4. Get dropped in grub rescue because the files are compressed on the btrfs filesystem and can't be read by grub2
  
Actual results:
Can't boot if grub files are modified on btrfs with lzo compression


Expected results:
Grub to be able to read its configuration files and such.

Comment 1 Paul Alesius 2012-03-16 02:26:56 UTC

A fix is to boot with a rescue disk that doesn't mount the /boot with compress=lzo, and re-generate the grub files.

Such as with:
grub2-install --root-directory=/ /dev/sd...
/sbin/grub2-mkconfig -i /boot/grub2/grub.conf

The files will be generated without the compression so you will be able to boot, until an update changes some file in /boot while compression is turned on.

Comment 2 Mads Kiilerich 2012-04-17 23:14:18 UTC

Upstream bug http://savannah.gnu.org/bugs/?33287 , so it should be fixed in the grub version used in f17.

A backport to f16 is IMO very unlikely.