On Wed, 05 Jun 2024 23:36:12 +0100 Mark Brown broonie@kernel.org wrote:
KTAP parsers interpret the output of ksft_test_result_*() as being the name of the test. The map_fixed_noreplace test uses a dynamically allocated base address for the mmap()s that it tests and currently includes this in the test names that it logs so the test names that are logged are not stable between runs. It also uses multiples of PAGE_SIZE which mean that runs for kernels with different PAGE_SIZE configurations can't be directly compared. Both these factors cause issues for CI systems when interpreting and displaying results.
Fix this by replacing the current test names with fixed strings describing the intent of the mappings that are logged, the existing messages with the actual addresses and sizes are retained as diagnostic prints to aid in debugging.
This sounds fairly annoying and I'm inclined to backport the fix into -stable kernels(?).