From c8d36bc2df89dbb7f27cc560a0c5252a6dd16c10 Mon Sep 17 00:00:00 2001 From: Waiman Long Date: Thu, 7 Mar 2024 14:05:48 -0500 Subject: [PATCH] mm/kmemleak: disable KASAN instrumentation in kmemleak Kmemleak ia a memory leak checker. KASAN is also a memory checker but it focuses more on finding out-of-bounds and use-after-free bugs. Since kmemleak is inherently slow especially on systems with large number of CPUs, adding KASAN instrumentation will make it slower even more. As kmemleak is not for production use, the utility of enabling KASAN there is questionable. This patch disables KASAN instrumentation for configurations that enable both of them to slightly reduce performance overhead. Link: https://lkml.kernel.org/r/20240307190548.963626-3-longman@redhat.com Signed-off-by: Waiman Long Acked-by: Catalin Marinas Signed-off-by: Andrew Morton --- mm/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/Makefile b/mm/Makefile index 4abb40b911ec..e164eed35d46 100644 --- a/mm/Makefile +++ b/mm/Makefile @@ -5,6 +5,7 @@ KASAN_SANITIZE_slab_common.o := n KASAN_SANITIZE_slub.o := n +KASAN_SANITIZE_kmemleak.o := n KCSAN_SANITIZE_kmemleak.o := n # These produce frequent data race reports: most of them are due to races on