[kj4ips]

In that boat now, weak-modules means you sometimes get lucky, and can reuse. However, since it's more effort to determine if a rebuild is needed than just slap the "build all the vendor kmods and slurm" button, we tend to build for each kernel. IIRC el8 added kernel symbol signature hashes as Provide/Requires, with automation to extract them at build time, so kmods got a lot easier to deal with.

[jabl]

Sorry, I was being imprecise. Rebuilds per se are no problem, as both MOFED and Lustre provide sources, and DKMS nicely automates rebuilding when installing a new kernel image. The actual problem is that RHEL minor releases would also break kernel internal API's, and thus building the kernel modules would fail.