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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 <longman@redhat.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Waiman Long 2024-03-07 14:05:48 -05:00 committed by Andrew Morton
parent b04da04220
commit c8d36bc2df
1 changed files with 1 additions and 0 deletions
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mm/Makefile
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@ -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