linux-kernel - distro support for CONFIG_KUNIT: [PATCH 0/3] bitmap: convert self-test to KUnit

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Message-ID: <bd71c705-5f57-4067-b200-fd80b98ddbc9@nvidia.com>
Date: Mon, 10 Feb 2025 11:35:48 -0800
From: John Hubbard <jhubbard@...dia.com>
To: Geert Uytterhoeven <geert@...ux-m68k.org>, Yury Norov
	<yury.norov@...il.com>
CC: Tamir Duberstein <tamird@...il.com>, David Gow <davidgow@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>, Madhavan Srinivasan
	<maddy@...ux.ibm.com>, Michael Ellerman <mpe@...erman.id.au>, Nicholas Piggin
	<npiggin@...il.com>, Christophe Leroy <christophe.leroy@...roup.eu>, "Naveen
 N Rao" <naveen@...nel.org>, Rasmus Villemoes <linux@...musvillemoes.dk>,
	"Shuah Khan" <shuah@...nel.org>, Kees Cook <kees@...nel.org>, Muhammad Usama
 Anjum <usama.anjum@...labora.com>, <linux-kernel@...r.kernel.org>,
	<linux-m68k@...ts.linux-m68k.org>, <linuxppc-dev@...ts.ozlabs.org>,
	<linux-kselftest@...r.kernel.org>, Brad Figg <bfigg@...dia.com>, "David
 Hildenbrand" <david@...hat.com>, Michal Hocko <mhocko@...e.com>, "Jason
 Gunthorpe" <jgg@...dia.com>
Subject: distro support for CONFIG_KUNIT: [PATCH 0/3] bitmap: convert
 self-test to KUnit

On 2/9/25 11:54 PM, Geert Uytterhoeven wrote:
> On Sat, 8 Feb 2025 at 18:53, Yury Norov <yury.norov@...il.com> wrote:
>> On Fri, Feb 07, 2025 at 03:14:01PM -0500, Tamir Duberstein wrote:
>>> On 7/27/24 12:35 AM, Shuah Khan wrote:
...
>>> The crux of the argument seems to be that the config help text is taken
>>> to describe the author's intent with the fragment "at boot". I think
> 
> IMO, "at boot" is a misnomer, as most tests can be either builtin
> or modular.

Right.

> 
>> KUNIT is disabled in defconfig, at least on x86_64. It is also disabled
>> on my Ubuntu 24.04 machine. If I take your patches, I'll be unable to

OK so I just bought a shiny new test machine, and installed one of the
big name distros on it, hoping they've moved ahead and bought into the kunit
story...

$ grep KUNIT /boot/config-6.8.0-52-generic
# CONFIG_KUNIT is not set

...gagghh! No such luck. One more data point, in support of Yuri's complaint. :)

> 
> I think distros should start setting CONFIG_KUNIT=m.

Yes they should! kunit really does have important advantages for many use
cases, including bitmaps here, and "CONFIG_KUNIT is not set" is the main
obstacle.

Let me add a few people to Cc who might be able to influence some distros.

thanks,
-- 
John Hubbard