linux-kernel - [PATCH v2 0/2] locking/lockdep: Disable KASAN instrumentation of lockdep.c

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Message-ID: <20250205012411.1010817-1-longman@redhat.com>
Date: Tue,  4 Feb 2025 20:24:09 -0500
From: Waiman Long <longman@...hat.com>
To: Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Will Deacon <will.deacon@....com>,
	Boqun Feng <boqun.feng@...il.com>
Cc: linux-kernel@...r.kernel.org,
	Waiman Long <longman@...hat.com>
Subject: [PATCH v2 0/2] locking/lockdep: Disable KASAN instrumentation of lockdep.c

It is found that disabling KASAN instrumentation when compiling
lockdep.c can significantly improve the performance of RT debug kernel
while the performance benefit of non-RT debug kernel is relatively
modest.

This series also include a patch to add locking events to the rtmutex
slow paths for better analysis of the different performance behavior
between RT and non-RT debug kernels.

Waiman Long (2):
  locking/lock_events: Add locking events for rtmutex slow paths
  locking/lockdep: Disable KASAN instrumentation of lockdep.c

 kernel/locking/Makefile           |  3 ++-
 kernel/locking/lock_events_list.h | 21 +++++++++++++++++++++
 kernel/locking/rtmutex.c          | 29 ++++++++++++++++++++++++-----
 3 files changed, 47 insertions(+), 6 deletions(-)

-- 
2.48.1