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Message-ID: <Y4DFx20YXDLcuVJm@google.com> Date: Fri, 25 Nov 2022 13:40:23 +0000 From: Lee Jones <lee@...nel.org> To: arnd@...db.de, akpm@...ux-foundation.org, nathan@...nel.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 Cc: 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, 25 Nov 2022, 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> > --- > 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 Note this also fixes 61 warnings when (GCC && !GCC_PLUGIN_LATENT_ENTROPY) ... which as Arnd says should not be enabled by default. We'll address that issue once this set has been applied. -- Lee Jones [李琼斯]
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