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kasan: default to inline instrumentation

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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@tum.de
Signed-off-by: Paul Heidekrüger <paul.heidekrueger@tum.de>
Reported-by: Andrey Konovalov <andreyknvl@gmail.com>
Reviewed-by: Marco Elver <elver@google.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=203495
Acked-by: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Paul Heidekrüger 2023-11-09 15:51:00 +00:00 committed by Andrew Morton
parent 932b59e3be
commit 83a6fdd6c2
1 changed files with 1 additions and 1 deletions
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2
lib/Kconfig.kasan
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@ -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"