linux-kernel - Re: [PATCH v2 4/4] drm/format-helper: Add KUnit tests for drm_fb_xrgb8888_to

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Date:   Wed, 10 Aug 2022 09:45:19 -0700
From:   Daniel Latypov <dlatypov@...gle.com>
To:     José Expósito <jose.exposito89@...il.com>,
        David Gow <davidgow@...gle.com>,
        Javier Martinez Canillas <javierm@...hat.com>,
        Daniel Latypov <dlatypov@...gle.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Maxime Ripard <mripard@...nel.org>,
        David Airlie <airlied@...ux.ie>,
        maarten.lankhorst@...ux.intel.com,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Maíra Canal <maira.canal@....br>,
        Isabella Basso <isabbasso@...eup.net>, magalilemes00@...il.com,
        tales.aparecida@...il.com, dri-devel@...ts.freedesktop.org,
        KUnit Development <kunit-dev@...glegroups.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc:     Daniel Vetter <daniel@...ll.ch>
Subject: Re: [PATCH v2 4/4] drm/format-helper: Add KUnit tests for drm_fb_xrgb8888_to_rgb565()

On Wed, Aug 10, 2022 at 9:31 AM Daniel Vetter <daniel@...ll.ch> wrote:
>
> On Sun, Jul 17, 2022 at 07:00:54PM +0200, José Expósito wrote:
> > José Expósito <jose.exposito89@...il.com> wrote:
> > > I already fixed the warning and added the reviewed by tags, however, I
> > > noticed that rebasing the series on the latest drm-misc-next show this
> > > error:
> > > [...]
> >
> > Sorry for the extra email. I forgot to mention that the error is only
> > present in UML. Running in other architectures works as expected.
> > Tested on x86_64 and PowerPC.
>
> Maybe a regression in the kunit infrastructure? Just guessing here ...
> -Daniel

As noted elsewhere on the thread, these errors means that kunit.py
can't parse the KTAP output coming from the kernel.
There shouldn't be any recent changes in either the python-side parser
or the kernel-side output logic.

So I can't think of a kunit-specific change that would trigger this.
There could be some other issue causing output mangling.

We'd want to look at what output the UML kernel produces (stored in
.kunit/test.log, or visible via kunit.py run --raw_output).

-A different Daniel