[LU-2391] warning messages for missing symbols when lustre-modules::osd_zfs.ko installed on a system without zfs-modules installed

• Type: Bug
• Resolution: Fixed
• Priority: Blocker
• Fix Version/s: Lustre 2.4.0
• Affects Version/s: Lustre 2.4.0
• Labels: LB
• Severity: 3
• Assignee: Bruno Faccini (Inactive)
• Reporter: Andreas Dilger

Description

On Nov 8, 2012, at 5:54 AM, Prem Sethna Kancherla wrote on lustre-discuss:

While installing lustre 2.3 on Centos 6.3, I am getting a continuous warning messages regarding "osd_zfs.ko" .

How can these warning messages to be removed while installing? They come while installing lustre-modules RPM. Messages are like:

WARNING: /lib/modules/2.6.32-279.5.1.el6_lustre.gb16fe80.x86_64/updates/kernel/fs/lustre/osd_zfs.ko needs unknown symbol zap_cursor_serialize
WARNING: /lib/modules/2.6.32-279.5.1.el6_lustre.gb16fe80.x86_64/updates/kernel/fs/lustre/osd_zfs.ko needs unknown symbol zap_remove
:
:

I think three options exist:

• suppress the warnings from osd_zfs.ko during installation, but this will only work for the lustre-modules RPM, and not for any other module depmod runs from other RPMs or by the user
• delete the osd_zfs.ko module at install time (preferably before depmod is run to produce these error messages). This will prevent the user from using ZFS if it is later installed (probably not a huge chance of problems for users)
• split the osd_zfs.ko module into a separate RPM. This might also avoid licensing issues that users are concerned about due to CDDL.

Issue Links

• is duplicated by: LU-2993 Missing symbol warnings when installing OSD packages
• is duplicated by: LU-2507 Configure and test ZFS using dkms
• is related to: LU-1032 Add dkms support for kernel modules