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Since updating to ZFS 2.0+, we have been updating kernel module frequently. This has lead to some versioning issues between pre-compiled ZFS kernel modules and the installed version of the ZFS userland in titan server. This check was originally put in place to make sure the kernel modules don't outpace the userland because it was thought that it would be okay, it wasn't tested. It is not tested. The e2e tests have confirmed the following scenarios:
Looking at the roadmap for ZFS, it is very likely to remain in the 2.1 branch for a few years. I feel this userland check should not be an issue until a major version release for ZFS.