On Tue, Sep 9, 2025 at 11:54 AM Jason Gunthorpe [off-list ref] wrote:

On Tue, Sep 09, 2025 at 11:40:18AM -0400, Pasha Tatashin wrote:

quoted

In reality, this is not something that is high priority for cloud
providers, because these kinds of incompatibilities would be found
during qualification; the kernel will fail to update by detecting a
version mismatch during boot instead of during shutdown.

Given I expect CSPs will have to add-in specific version support for
their own special version-pair needs, I think it would be helpful in
the long run to have a tool that reported what versions a kernel build
wrote and parsed. Test-to-learn the same information sounds a bit too
difficult.

Yes, I agree. My point was only about the near term: it's just not a
priority at the moment. This won't block us in the future, as we can
always add a tooling later to inject the required ELF segments for
pre-live update checks.

Pasha