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From: Nathan Chancellor <nathan@kernel.org>
To: Guenter Roeck <linux@roeck-us.net>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Arnd Bergmann <arnd@kernel.org>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	llvm@lists.linux.dev, Nick Desaulniers <ndesaulniers@google.com>
Subject: Re: [PATCH] Enable '-Werror' by default for all kernel builds
Date: Tue, 7 Sep 2021 12:12:19 -0700	[thread overview]
Message-ID: <4063ef23-d769-167f-75b4-6a27cee5ecba@kernel.org> (raw)
In-Reply-To: <1b7cac01-adab-e2d4-769b-b14ed8903ad9@roeck-us.net>

On 9/7/2021 10:48 AM, Guenter Roeck wrote:
> On 9/7/21 10:10 AM, Linus Torvalds wrote:
>> On Tue, Sep 7, 2021 at 2:11 AM Arnd Bergmann <arnd@kernel.org> wrote:
>>>
>>>> x86_64-alpine.log:drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dcn_calcs.c:452:13: 
>>>> error: stack frame size (1800) exceeds limit (1280) in function 
>>>> 'dcn_bw_calc_rq_dlg_ttu' [-Werror,-Wframe-larger-than]
>>>> x86_64-alpine.log:drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn21/display_rq_dlg_calc_21.c:1657:6: 
>>>> error: stack frame size (1336) exceeds limit (1280) in function 
>>>> 'dml21_rq_dlg_get_dlg_reg' [-Werror,-Wframe-larger-than]
>>>> x86_64-alpine.log:drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn30/display_rq_dlg_calc_30.c:1831:6: 
>>>> error: stack frame size (1352) exceeds limit (1280) in function 
>>>> 'dml30_rq_dlg_get_dlg_reg' [-Werror,-Wframe-larger-than]
>>>> x86_64-alpine.log:drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn31/display_rq_dlg_calc_31.c:1676:6: 
>>>> error: stack frame size (1336) exceeds limit (1280) in function 
>>>> 'dml31_rq_dlg_get_dlg_reg' [-Werror,-Wframe-larger-than]
>>>> x86_64-alpine.log:drivers/vhost/scsi.c:1831:12: error: stack frame 
>>>> size (1320) exceeds limit (1280) in function 'vhost_scsi_release' 
>>>> [-Werror,-Wframe-larger-than]
>>>>
> 
> FWIW, the above is because of
> 
> static void vhost_scsi_flush(struct vhost_scsi *vs)
> {
>          struct vhost_scsi_inflight *old_inflight[VHOST_SCSI_MAX_VQ];
> 
> where VHOST_SCSI_MAX_VQ=128. Presumably some versions of clang inline
> this function. gcc has the same problem here - its stack frame size is
> also > 1024 for vhost_scsi_flush().

Good to know. When investigating these, I intend to compare against GCC 
to see what the difference is to know if it is a problem with the code 
or a compiler issue.

Cheers,
Nathan


  reply	other threads:[~2021-09-07 19:12 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-06 14:26 [PATCH] Enable '-Werror' by default for all kernel builds Guenter Roeck
2021-09-06 16:12 ` Linus Torvalds
2021-09-06 16:18   ` Linus Torvalds
2021-09-06 17:05   ` Guenter Roeck
2021-09-06 23:06     ` Linus Torvalds
2021-09-06 23:49       ` Guenter Roeck
2021-09-07  1:12         ` Linus Torvalds
2021-09-07  2:29           ` Guenter Roeck
2021-09-07 15:50             ` Guenter Roeck
2021-09-07  8:56         ` Arnd Bergmann
2021-09-08  4:28         ` Guenter Roeck
2021-09-08  4:48           ` Al Viro
2021-09-08  5:14             ` Guenter Roeck
2021-09-08  7:11               ` Geert Uytterhoeven
2021-09-08  9:50                 ` Arnd Bergmann
2021-09-08 10:10                   ` Geert Uytterhoeven
2021-09-08 10:21                   ` Geert Uytterhoeven
2021-09-08 12:42                   ` Guenter Roeck
2021-09-08 13:19                     ` Al Viro
2021-09-08 13:54                       ` Guenter Roeck
2021-09-08 14:47                   ` David Laight
2021-09-08  4:55           ` Linus Torvalds
2021-09-08  5:46             ` Guenter Roeck
2021-09-07  5:32       ` Huang Rui
2021-09-07  6:15         ` Christian König
2021-09-07  6:58           ` Geert Uytterhoeven
2021-09-07  2:30   ` Nathan Chancellor
2021-09-07  9:11     ` Arnd Bergmann
2021-09-07 17:10       ` Linus Torvalds
2021-09-07 17:33         ` Linus Torvalds
2021-09-07 21:07           ` Harry Wentland
2021-09-08  3:52             ` Harry Wentland
2021-09-08  4:41               ` Linus Torvalds
2021-09-09  0:48                 ` Harry Wentland
2021-09-07 17:48         ` Guenter Roeck
2021-09-07 19:12           ` Nathan Chancellor [this message]
2021-09-08 20:55       ` Nathan Chancellor
2021-09-08 21:16         ` Guenter Roeck
2021-09-08 21:58           ` Marco Elver
2021-09-09  5:58             ` Christoph Hellwig
2021-09-09  6:07               ` Guenter Roeck
2021-09-09  7:30                 ` Christian König
2021-09-09 14:59                   ` Guenter Roeck
2021-09-09 10:53               ` Marco Elver
2021-09-09 11:00                 ` Arnd Bergmann
2021-09-09 11:43                   ` Marco Elver
2021-09-09 12:55                     ` Arnd Bergmann
2021-09-09 16:53                     ` Linus Torvalds
2021-09-09 16:46               ` Linus Torvalds
2021-09-21 15:41         ` Arnd Bergmann

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