The patch titled
Subject: kasan: default to inline instrumentation
has been added to the -mm mm-unstable branch. Its filename is
kasan-default-to-inline-instrumentation.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kasan-default-to-inline-instrumentation.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Paul Heidekrüger <paul.heidekrueger@xxxxxx>
Subject: kasan: default to inline instrumentation
Date: Thu, 9 Nov 2023 15:51:00 +0000
KASan inline instrumentation can yield up to a 2x performance gain at the
cost of a larger binary.
Make inline instrumentation the default, as suggested in the bug report
below.
When an architecture does not support inline instrumentation, it should
set ARCH_DISABLE_KASAN_INLINE, as done by PowerPC, for instance.
Link: https://lkml.kernel.org/r/20231109155101.186028-1-paul.heidekrueger@xxxxxx
Signed-off-by: Paul Heidekrüger <paul.heidekrueger@xxxxxx>
Reported-by: Andrey Konovalov <andreyknvl@xxxxxxxxx>
Reviewed-by: Marco Elver <elver@xxxxxxxxxx>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=203495
Acked-by: Andrey Konovalov <andreyknvl@xxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx>
Cc: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/Kconfig.kasan | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/lib/Kconfig.kasan~kasan-default-to-inline-instrumentation
+++ a/lib/Kconfig.kasan
@@ -134,7 +134,7 @@ endchoice
choice
prompt "Instrumentation type"
depends on KASAN_GENERIC || KASAN_SW_TAGS
- default KASAN_OUTLINE
+ default KASAN_INLINE if !ARCH_DISABLE_KASAN_INLINE
config KASAN_OUTLINE
bool "Outline instrumentation"
_
Patches currently in -mm which might be from paul.heidekrueger@xxxxxx are
kasan-default-to-inline-instrumentation.patch
