Re: [PATCH v2 linux-kselftest-test 0/3] kunit: support building core/tests as modules

From: Alan Maguire
Date: Mon Oct 14 2019 - 10:02:54 EST

On Mon, 14 Oct 2019, Luis Chamberlain wrote:

> On Tue, Oct 08, 2019 at 03:55:43PM +0100, Alan Maguire wrote:
> > The current kunit execution model is to provide base kunit functionality
> > and tests built-in to the kernel. The aim of this series is to allow
> > building kunit itself and tests as modules. This in turn allows a
> > simple form of selective execution; load the module you wish to test.
> > In doing so, kunit itself (if also built as a module) will be loaded as
> > an implicit dependency.
> >
> > Because this requires a core API modification - if a module delivers
> > multiple suites, they must be declared with the kunit_test_suites()
> > macro - we're proposing this patch as a candidate to be applied to the
> > test tree before too many kunit consumers appear. We attempt to deal
> > with existing consumers in patch 1.
> This is neat and makes sense to me.

Thanks for taking a look!

> However the ordering of the patches
> seems odd. If modules depend on kunit module, then shouldn't that go
> first? Ie, we want this to be bisectable in proper order.

The reasoning here is it seemed a more likely scenario that users mught
build kunit built-in (CONFIG_KUNIT=y) along with test suites built as
modules (CONFIG_KUNIT_TEST=m). So the intermediate state after patch 2 -
tests buildable as modules while kunit is still built-in-only - made more
sense to me as something users might do in practice so that's why I
ordered things that way. I'm working on a new revision of the patchset
though, so if you feel strongly about this shout and I'll try and accommodate
the alternative ordering.



> Luis