linux-kernel - Re: [PATCH] drm/tests: reduce drm_mm

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Message-ID: <6d3486ef-db9d-6b53-096e-00c961a5424b@igalia.com>
Date:   Fri, 23 Dec 2022 19:27:24 -0300
From:   Maíra Canal <mcanal@...lia.com>
To:     Arnd Bergmann <arnd@...nel.org>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     Arnd Bergmann <arnd@...db.de>, Tom Rix <trix@...hat.com>,
        Daniel Latypov <dlatypov@...gle.com>, llvm@...ts.linux.dev,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Javier Martinez Canillas <javierm@...hat.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Nathan Chancellor <nathan@...nel.org>,
        Maíra Canal <maira.canal@....br>
Subject: Re: [PATCH] drm/tests: reduce drm_mm_test stack usage

On 12/15/22 13:34, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> The check_reserve_boundaries function uses a lot of kernel stack,
> and it gets inlined by clang, which makes __drm_test_mm_reserve
> use even more of it, to the point of hitting the warning limit:
> 
> drivers/gpu/drm/tests/drm_mm_test.c:344:12: error: stack frame size (1048) exceeds limit (1024) in '__drm_test_mm_reserve' [-Werror,-Wframe-larger-than]
> 
> When building with gcc, this does not happen, but the structleak
> plugin can similarly increase the stack usage and needs to be
> disabled, as we do for all other kunit users.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Applied it to drm-misc-next-fixes with the small checkpatch fix.

Best Regards,
- Maíra Canal