From: "Maíra Canal" <maira.canal@usp.br>
To: Daniel Latypov <dlatypov@google.com>, Guenter Roeck <linux@roeck-us.net>
Cc: siqueirajordao@riseup.net, "David Airlie" <airlied@linux.ie>,
brendanhiggins@google.com, dri-devel@lists.freedesktop.org,
linux-kselftest@vger.kernel.org, n@nfraprado.net,
"Isabella Basso" <isabbasso@riseup.net>,
andrealmeid@riseup.net, magalilemes00@gmail.com,
"Javier Martinez Canillas" <javierm@redhat.com>,
mwen@igalia.com, "David Gow" <davidgow@google.com>,
"Shuah Khan" <skhan@linuxfoundation.org>,
kunit-dev@googlegroups.com, michal.winiarski@intel.com,
tales.aparecida@gmail.com, linux-kernel@vger.kernel.org,
leandro.ribeiro@collabora.com,
"Thomas Zimmermann" <tzimmermann@suse.de>,
"José Expósito" <jose.exposito89@gmail.com>
Subject: Re: [PATCH v5 4/9] drm: selftest: convert drm_format selftest to KUnit
Date: Sun, 17 Jul 2022 14:48:04 -0300 [thread overview]
Message-ID: <99aedd6c-0254-9712-a7d7-d94c0be31086@usp.br> (raw)
In-Reply-To: <CAGS_qxrhy3=pST9f85fvxubKQShOq1XF6ZHALzMhXDOf5gnaUg@mail.gmail.com>
On 7/14/22 21:03, Daniel Latypov wrote:
> On Thu, Jul 14, 2022 at 4:51 PM Guenter Roeck <linux@roeck-us.net> wrote:
>>
>> On Fri, Jul 08, 2022 at 05:30:47PM -0300, Maíra Canal wrote:
>>> Considering the current adoption of the KUnit framework, convert the
>>> DRM format selftest to the KUnit API.
>>>
>>> Tested-by: David Gow <davidgow@google.com>
>>> Acked-by: Daniel Latypov <dlatypov@google.com>
>>> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
>>> Signed-off-by: Maíra Canal <maira.canal@usp.br>
>>
>> This patch results in:
>>
>> Building powerpc:allmodconfig ... failed
>> --------------
>> Error log:
>> drivers/gpu/drm/tests/drm_format_test.c: In function 'igt_check_drm_format_min_pitch':
>> drivers/gpu/drm/tests/drm_format_test.c:271:1: error: the frame size of 3712 bytes is larger than 2048 bytes
>>
>> presumably due to function nesting.
>
> This can happen when there's a lot of KUNIT_EXPECT_* calls in a single function.
> See [1] for some related context.
> There were a number of patches that went into 5.18 ([2] and others) to
> try and mitigate this, but it's not always enough.
>
> Ideally the compiler would see that the stack-local variables used in
> these macros don't need to stick around, but it doesn't always
> happen...
As a matter of fact, for GCC 12, the warning -Wframe-larger-than=
doesn't show up due to compiler improvement, but for GCC 11.3, it does.
As I have GCC 12 on my machine, I didn't even get the warning.
Anyway, I'll separate the test into multiple functions to avoid any
problems related to stack size.
Best Regards,
- Maíra Canal
> One workaround would be to split up the test case functions into smaller chunks.
>
> [1] https://lore.kernel.org/linux-kselftest/20210929212713.1213476-1-brendanhiggins@google.com/
> [2] https://lore.kernel.org/linux-kselftest/20220113165931.451305-1-dlatypov@google.com/
>
> Daniel
next prev parent reply other threads:[~2022-07-17 17:48 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-08 20:30 [PATCH v5 0/9] drm: selftest: Convert to KUnit Maíra Canal
2022-07-08 20:30 ` [PATCH v5 1/9] drm: selftest: convert drm_damage_helper selftest " Maíra Canal
2022-07-08 20:30 ` [PATCH v5 2/9] drm: selftest: convert drm_cmdline_parser " Maíra Canal
2022-07-08 20:30 ` [PATCH v5 3/9] drm: selftest: convert drm_rect " Maíra Canal
2022-07-08 20:30 ` [PATCH v5 4/9] drm: selftest: convert drm_format " Maíra Canal
2022-07-14 23:51 ` Guenter Roeck
2022-07-15 0:03 ` Daniel Latypov
2022-07-15 6:59 ` Javier Martinez Canillas
2022-07-15 11:43 ` Maíra Canal
2022-07-17 17:48 ` Maíra Canal [this message]
2022-07-15 0:04 ` Guenter Roeck
2022-07-08 20:30 ` [PATCH v5 5/9] drm: selftest: convert drm_plane_helper " Maíra Canal
2022-07-08 20:30 ` [PATCH v5 6/9] drm: selftest: convert drm_dp_mst_helper " Maíra Canal
2022-07-08 20:30 ` [PATCH v5 7/9] drm: selftest: convert drm_framebuffer " Maíra Canal
2022-07-08 20:30 ` [PATCH v5 8/9] drm: selftest: convert drm_buddy " Maíra Canal
2022-07-08 20:30 ` [PATCH v5 9/9] drm: selftest: convert drm_mm " Maíra Canal
2022-07-22 10:35 ` Matthew Auld
2022-07-22 11:04 ` Maíra Canal
2022-07-22 16:25 ` Michał Winiarski
2022-08-21 22:22 ` Isabella Basso
2022-08-24 0:46 ` Michał Winiarski
2023-04-27 13:14 ` Maxime Ripard
2023-07-25 8:38 ` Maxime Ripard
2023-07-25 9:54 ` David Gow
2023-07-31 12:18 ` Maxime Ripard
2022-07-11 16:56 ` [PATCH v5 0/9] drm: selftest: Convert " Javier Martinez Canillas
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