Re: [PATCH v2 3/3] selftests: ublk: add test to verify that feat_map is complete

[Ming Lei]

On Fri, Sep 19, 2025 at 3:34 AM Uday Shankar <ushankar@xxxxxxxxxxxxxxx> wrote:
>
> Add a test that verifies that the currently running kernel does not
> report support for any features that are unrecognized by kublk. This
> should catch cases where features are added without updating kublk's
> feat_map accordingly, which has happened multiple times in the past (see
> [1], [2]).
>
> Note that this new test may fail if the test suite is older than the
> kernel, and the newer kernel contains a newly introduced feature. I
> believe this is not a use case we currently care about - we only care
> about newer test suites passing on older kernels.
>
> [1] https://lore.kernel.org/linux-block/20250606214011.2576398-1-csander@xxxxxxxxxxxxxxx/t/#u
> [2] https://lore.kernel.org/linux-block/2a370ab1-d85b-409d-b762-f9f3f6bdf705@xxxxxxxxxx/t/#m1c520a058448d594fd877f07804e69b28908533f
>
> Signed-off-by: Uday Shankar <ushankar@xxxxxxxxxxxxxxx>

Reviewed-by: Ming Lei <ming.lei@xxxxxxxxxx>

Thanks,