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[103.168.172.200]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6e8f707bec2sm24919316d6.6.2025.03.07.15.29.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 07 Mar 2025 15:29:01 -0800 (PST) Received: from phl-compute-06.internal (phl-compute-06.phl.internal [10.202.2.46]) by mailfauth.phl.internal (Postfix) with ESMTP id 12056120006A; Fri, 7 Mar 2025 18:29:01 -0500 (EST) Received: from phl-mailfrontend-01 ([10.202.2.162]) by phl-compute-06.internal (MEProxy); Fri, 07 Mar 2025 18:29:01 -0500 X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeefvddrtddtgdduudduleelucetufdoteggodetrf dotffvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdggtfgfnhhsuhgsshgtrhhisggv pdfurfetoffkrfgpnffqhgenuceurghilhhouhhtmecufedttdenucesvcftvggtihhpih gvnhhtshculddquddttddmnecujfgurhephffvvefufffkofgjfhgggfestdekredtredt tdenucfhrhhomhepuehoqhhunhcuhfgvnhhguceosghoqhhunhdrfhgvnhhgsehgmhgrih hlrdgtohhmqeenucggtffrrghtthgvrhhnpefghfffvefhhfdvgfejgfekvdelgfekgeev ueehlefhiedvgeffjefgteeugfehieenucffohhmrghinhepkhgvrhhnvghlrdhorhhgne cuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehmrghilhhfrhhomhepsghoqhhu nhdomhgvshhmthhprghuthhhphgvrhhsohhnrghlihhthidqieelvdeghedtieegqdduje ejkeehheehvddqsghoqhhunhdrfhgvnhhgpeepghhmrghilhdrtghomhesfhhigihmvgdr nhgrmhgvpdhnsggprhgtphhtthhopeejpdhmohguvgepshhmthhpohhuthdprhgtphhtth hopehmihhnghhosehkvghrnhgvlhdrohhrghdprhgtphhtthhopehpvghtvghriiesihhn fhhrrgguvggrugdrohhrghdprhgtphhtthhopeifihhllheskhgvrhhnvghlrdhorhhgpd hrtghpthhtoheplhhonhhgmhgrnhesrhgvughhrghtrdgtohhmpdhrtghpthhtoheplhhi nhhugidqkhgvrhhnvghlsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtohepsg hoqhhunhdrfhgvnhhgsehgmhgrihhlrdgtohhmpdhrtghpthhtohepmhhinhhgohesrhgv ughhrghtrdgtohhm X-ME-Proxy: Feedback-ID: iad51458e:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Fri, 7 Mar 2025 18:29:00 -0500 (EST) From: Boqun Feng To: Ingo Molnar , Peter Zijlstra Cc: Will Deacon , Waiman Long , linux-kernel@vger.kernel.org, Boqun Feng , Ingo Molnar Subject: [PATCH locking 04/11] locking/lock_events: Add locking events for lockdep Date: Fri, 7 Mar 2025 15:26:54 -0800 Message-ID: <20250307232717.1759087-5-boqun.feng@gmail.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250307232717.1759087-1-boqun.feng@gmail.com> References: <20250307232717.1759087-1-boqun.feng@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Waiman Long Add some lock events to the lockdep for profiling its behavior. Signed-off-by: Waiman Long Signed-off-by: Boqun Feng Link: https://lore.kernel.org/r/20250213200228.1993588-3-longman@redhat.com --- kernel/locking/lock_events_list.h | 7 +++++++ kernel/locking/lockdep.c | 8 +++++++- 2 files changed, 14 insertions(+), 1 deletion(-) diff --git a/kernel/locking/lock_events_list.h b/kernel/locking/lock_events= _list.h index 80b11f194c9f..9ef9850aeebe 100644 --- a/kernel/locking/lock_events_list.h +++ b/kernel/locking/lock_events_list.h @@ -88,3 +88,10 @@ LOCK_EVENT(rtmutex_slow_acq3) /* # of locks acquired in = *block() */ LOCK_EVENT(rtmutex_slow_sleep) /* # of sleeps */ LOCK_EVENT(rtmutex_slow_wake) /* # of wakeup's */ LOCK_EVENT(rtmutex_deadlock) /* # of rt_mutex_handle_deadlock()'s */ + +/* + * Locking events for lockdep + */ +LOCK_EVENT(lockdep_acquire) +LOCK_EVENT(lockdep_lock) +LOCK_EVENT(lockdep_nocheck) diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index 4470680f0226..8436f017c74d 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -61,6 +61,7 @@ #include =20 #include "lockdep_internals.h" +#include "lock_events.h" =20 #include =20 @@ -170,6 +171,7 @@ static struct task_struct *lockdep_selftest_task_struct; static int graph_lock(void) { lockdep_lock(); + lockevent_inc(lockdep_lock); /* * Make sure that if another CPU detected a bug while * walking the graph we dont change it (while the other @@ -5091,8 +5093,12 @@ static int __lock_acquire(struct lockdep_map *lock, = unsigned int subclass, if (unlikely(lock->key =3D=3D &__lockdep_no_track__)) return 0; =20 - if (!prove_locking || lock->key =3D=3D &__lockdep_no_validate__) + lockevent_inc(lockdep_acquire); + + if (!prove_locking || lock->key =3D=3D &__lockdep_no_validate__) { check =3D 0; + lockevent_inc(lockdep_nocheck); + } =20 if (subclass < NR_LOCKDEP_CACHING_CLASSES) class =3D lock->class_cache[subclass]; --=20 2.47.1