I'm working on merging the customizable segment size patch . I'd like to run some of the regression tests using it, to guarantee non-standard settings have test coverage. The reason I'd like to adapt an existing test, rather than add a new run of the standard regression tests, is to avoid bloating the regression time unnecessarily.
I thought about starting with just changing pg_upgrade's rerun of the standard test. Then maybe change one or two tests in src/test/recovery/?