[lustre-discuss] [EXTERNAL] Re: RHEL 9.8 and 10.2 support

[Kaizaad Bilimorya]

Hello Fokke,
Thank you for doing this, it was very helpful. I'll just add our build
notes here too in case someone else finds them useful:

** AlmaLinux release 9.8, Kernel 5.14.0-687.44.1.el9_8.x86_64*
git clone git://git.whamcloud.com/fs/lustre-release.git lustre-client
cd lustre-client/
git checkout tags/2.15.8

*- Fix for "/linux-time.h:238:9: error: implicit declaration of function
'from_timer'; did you mean 'mod_timer'?
[-Werror=implicit-function-declaration]" issue where the from_timer() macro
was renamed in recent Linux kernel versions*git pull
https://review.whamcloud.com/fs/lustre-release refs/changes/97/65797/7
sh autogen.sh
./configure --disable-iokit --disable-gss --disable-gss-keyring
--disable-server --disable-tests --enable-client
make rpms

Thanks
Kaizaad
--
Kaizaad Bilimorya
Systems Administrator - SHARCNET | http://www.sharcnet.ca
Digital Research Alliance of Canada | https://www.alliancecan.ca


On Mon, Jun 29, 2026 at 7:41 AM Fokke Dijkstra via lustre-discuss <
lustre-discuss at lists.lustre.org> wrote:

> I managed to create a patched version of the lustre-client-dkms 2.15.8
> rpm, which fixes the issue that the kernel modules cannot be compiled on
> our Alma Linux 9.8 client nodes.
> Since thousands of users can login on or submit jobs to these clients we
> absolutely need to be able to quickly fix privilege escalation exploits on
> these nodes.
>
> Here is a summary of the way I was able to rebuild the lustre-client-dkms
> rpm:
>
> The patches for the new kernels can be found via:
> https://jira.whamcloud.com/browse/LU-20071
> where LU-20071 is the label for the new Red Hat 9.8 release. I assume that
> a similar procedure can be followed in the future for Red Hat 9.9 and its
> derivatives.
> Note that in our case we wanted to fix the LTS release 2.15.8. So look for
> the branch b2_15 on the LU-20071 page. This specific patch can be found at:
> https://review.whamcloud.com/c/fs/lustre-release/+/65797
> Figuring this out took some time, as I did not know the structure of the
> build system, and I first tried to use the patch for the latest release,
> which would not apply.
>
> After this I used the following procedure to build an updated
> lustre-client-dkms rpm:
>
> 1. Download the Lustre source rpm from
> https://downloads.whamcloud.com/public/lustre/latest-release/el9.7/client/SRPMS/lustre-client-dkms-2.15.8-1.el9.src.rpm
> 2. Install the rpm using:
>   rpm -i lustre-client-dkms-2.15.8-1.el9.src.rpm
> 3. Go the the ~/rpmbuild/SOURCES directory and unpack the source file
>   tar xzf lustre-2.15.8.tar.gz
> 4. Download the patch from
> https://review.whamcloud.com/c/fs/lustre-release/+/65797, which can be
> downloaded using the "DOWNLOAD" link. I selected c131e65.diff.zip
> 5. Unzip the patch into c131e65.diff
> 6. Apply the patch using something like:
>   cd lustre-2.15.8
>   patch -p1 < ../c131e65.diff
>   cd ..
> 7. Create an updated source tar file:
>   tar czf lustre-2.15.8.tar.gz lustre-2.15.8
> 8. Fix the hardcoded buildid in the spec file, by changing it from 1 to 2,
> so the line reads:
> %define buildid 2
> 9. Build the rpm (client without zfs, but with ldiskfs for our use case):
> rpmbuild -ba rpmbuild/SPECS/lustre-dkms.spec --without servers --without
> zfs --with ldiskfs
>
> This results in
> rpmbuild/RPMS/noarch/lustre-client-dkms-2.15.8-2.el9.noarch.rpm
>
> Installing this rpm, together with lustre-client-2.15.8-1.el9.x86_64.rpm
> resulted in a working client on Alma Linux 9.8. I've tested some nodes
> using the IOR benchmark.
>
> I hope these instructions are helpful to others. Please let me know if you
> have suggestions to improve the procedure.
>
> Kind regards,
>
> Fokke Dijkstra
>
> Op di 9 jun 2026 om 19:07 schreef Mohr, Rick <mohrrf at ornl.gov>:
>
>> Looking through my scripts, the configure command was run with the
>> following options (with paths to dirs substituted for variables) after the
>> patch had been applied to the source code:
>>
>>   configure --with-linux=$KERN_DIR --with-linux-obj=$KERN_OBJ_DIR
>> --with-o2ib=$OFED_DIR --disable-gss --disable-gss-keyring --disable-server
>> --disable-tests --disable-iokit --with-mds-max-threads=8192
>> --enable-mpitests=yes
>>
>> Then I just ran "make rpms" to create the packages.  Everything was
>> pretty straightforward, although not all the options I used would
>> necessarily be needed at another site.
>>
>> --Rick
>>
>>
>> On 6/4/26, 12:35 PM, "Mohr, Rick" <mohrrf at ornl.gov <mailto:
>> mohrrf at ornl.gov>> wrote:
>>
>>
>> Well, I actually built the client using a wrapper script that James
>> Simmons wrote to manage git checkouts, patch application, etc. so the steps
>> were hidden by that process. I'll see if I can dig out the underlying
>> commands and post them here.
>>
>>
>> --Rick
>>
>>
>>
>>
>>
>
> --
> Fokke Dijkstra <f.dijkstra at rug.nl> <f.dijkstra at rug.nl>
> Team High Performance Computing
> Center for Information Technology, University of Groningen
> Postbus 11044, 9700 CA  Groningen, The Netherlands
>
> _______________________________________________
> lustre-discuss mailing list
> lustre-discuss at lists.lustre.org
> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
>
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