linux-kernel - Re: [PATCH v2 2/2] Kconfig.debug: Provide a little extra FRAME

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Message-ID: <Y4RMyAoa0+sJS9F3@dev-arch.thelio-3990X>
Date:   Sun, 27 Nov 2022 22:53:12 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     Lee Jones <lee@...nel.org>
Cc:     arnd@...db.de, akpm@...ux-foundation.org,
        maarten.lankhorst@...ux.intel.com, mripard@...nel.org,
        tzimmermann@...e.de, airlied@...il.com, daniel@...ll.ch,
        ndesaulniers@...gle.com, trix@...hat.com, harry.wentland@....com,
        sunpeng.li@....com, Rodrigo.Siqueira@....com,
        alexander.deucher@....com, christian.koenig@....com,
        Xinhui.Pan@....com, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH v2 2/2] Kconfig.debug: Provide a little extra FRAME_WARN
 leeway when KASAN is enabled

On Fri, Nov 25, 2022 at 12:07:50PM +0000, Lee Jones wrote:
> When enabled, KASAN enlarges function's stack-frames.  Pushing quite a
> few over the current threshold.  This can mainly be seen on 32-bit
> architectures where the present limit (when !GCC) is a lowly
> 1024-Bytes.
> 
> Signed-off-by: Lee Jones <lee@...nel.org>

Reviewed-by: Nathan Chancellor <nathan@...nel.org>

> ---
>  lib/Kconfig.debug | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
> index c3c0b077ade33..82d475168db95 100644
> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -399,6 +399,7 @@ config FRAME_WARN
>  	default 2048 if GCC_PLUGIN_LATENT_ENTROPY
>  	default 2048 if PARISC
>  	default 1536 if (!64BIT && XTENSA)
> +	default 1280 if KASAN && !64BIT
>  	default 1024 if !64BIT
>  	default 2048 if 64BIT
>  	help
> -- 
> 2.38.1.584.g0f3c55d4c2-goog
>