Details
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Bug
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Resolution: Fixed
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Minor
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Lustre 2.12.2
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None
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Ubuntu 18.04
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3
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9223372036854775807
Description
We have a number of old compute systems which have raid controllers, We are migrating these from a mix of redhat 7.6 and ubuntu 12.04 to ubuntu 18.04. The raid controllers on these systems require kernel modules from the distribution kernel-modules-extra package to function (e.g. to be able to drive the root filesystem device /dev/sda ).
We use dkms packages to install lustre modules
There is a version of lustre in the staging area of the -extra modules package in Ubuntu 18.04. This lustre system has a version of libcfs.ko version 0.7.0 while the libcfs.ko generated from a lustre 2.12.2 source tree has a libcfs.ko version 0.5.0 I have edited the source to bump the version of libcfs.ko to 0.8.0 and that results in a module that works on an 18.04 system with the modules-extra package installed.
We need a the source tree to support lustre while the staging modules are available.
For example, inspecting the Ubuntu 18.04 module
root@bc-25-1-02:~# modinfo /lib/modules/4.15.0-64-generic/kernel/drivers/staging/lustre/lnet/libcfs/libcfs.ko filename: /lib/modules/4.15.0-64-generic/kernel/drivers/staging/lustre/lnet/libcfs/libcfs.ko license: GPL version: 0.7.0 description: Lustre helper library author: OpenSFS, Inc. <http://www.lustre.org/> srcversion: 3EAA7DAA70F86FD8F262DC1 depends: staging: Y retpoline: Y intree: Y name: libcfs vermagic: 4.15.0-64-generic SMP mod_unload
Cf the upstream dkms:
root@farm5-head1:~# modinfo /lib/modules/4.15.0-64-generic/updates/dkms/libcfs.ko filename: /lib/modules/4.15.0-64-generic/updates/dkms/libcfs.ko license: GPL version: 0.5.0 description: Lustre helper library author: OpenSFS, Inc. <http://www.lustre.org/> srcversion: 01F59272261BC3745941E9A depends: retpoline: Y name: libcfs vermagic: 4.15.0-64-generic SMP mod_unload