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[103.168.172.201]) by smtp.gmail.com with ESMTPSA id af79cd13be357-7c0a0baa1e9sm926472085a.72.2025.02.23.18.11.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 23 Feb 2025 18:11:44 -0800 (PST) Received: from phl-compute-08.internal (phl-compute-08.phl.internal [10.202.2.48]) by mailfauth.phl.internal (Postfix) with ESMTP id 162E91200043; Sun, 23 Feb 2025 21:11:44 -0500 (EST) Received: from phl-mailfrontend-02 ([10.202.2.163]) by phl-compute-08.internal (MEProxy); Sun, 23 Feb 2025 21:11:44 -0500 X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeefvddrtddtgdejjeehudcutefuodetggdotefrod ftvfcurfhrohhfihhlvgemucfhrghsthforghilhdpggftfghnshhusghstghrihgsvgdp uffrtefokffrpgfnqfghnecuuegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivg hnthhsucdlqddutddtmdenucfjughrpeffhffvvefukfhfgggtuggjsehttdertddttddv necuhfhrohhmpeeuohhquhhnucfhvghnghcuoegsohhquhhnrdhfvghnghesghhmrghilh drtghomheqnecuggftrfgrthhtvghrnhephedugfduffffteeutddvheeuveelvdfhleel ieevtdeguefhgeeuveeiudffiedvnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrg hmpehmrghilhhfrhhomhepsghoqhhunhdomhgvshhmthhprghuthhhphgvrhhsohhnrghl ihhthidqieelvdeghedtieegqddujeejkeehheehvddqsghoqhhunhdrfhgvnhhgpeepgh hmrghilhdrtghomhesfhhigihmvgdrnhgrmhgvpdhnsggprhgtphhtthhopedufedpmhho uggvpehsmhhtphhouhhtpdhrtghpthhtoheplhhonhhgmhgrnhesrhgvughhrghtrdgtoh hmpdhrtghpthhtohepphgvthgvrhiisehinhhfrhgruggvrggurdhorhhgpdhrtghpthht ohepmhhinhhgohesrhgvughhrghtrdgtohhmpdhrtghpthhtohepfihilhhlrdguvggrtg honhesrghrmhdrtghomhdprhgtphhtthhopehrhigrsghinhhinhdrrgdrrgesghhmrghi lhdrtghomhdprhgtphhtthhopehglhhiuggvrhesghhoohhglhgvrdgtohhmpdhrtghpth htoheprghnughrvgihkhhnvhhlsehgmhgrihhlrdgtohhmpdhrtghpthhtohepughvhihu khhovhesghhoohhglhgvrdgtohhmpdhrtghpthhtohepvhhinhgtvghniihordhfrhgrsh gtihhnohesrghrmhdrtghomh X-ME-Proxy: Feedback-ID: iad51458e:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Sun, 23 Feb 2025 21:11:43 -0500 (EST) Date: Sun, 23 Feb 2025 18:11:42 -0800 From: Boqun Feng To: Waiman Long Cc: Peter Zijlstra , Ingo Molnar , Will Deacon , Andrey Ryabinin , Alexander Potapenko , Andrey Konovalov , Dmitry Vyukov , Vincenzo Frascino , Marco Elver , linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com Subject: Re: [PATCH v4 0/4] locking/lockdep: Disable KASAN instrumentation of lockdep.c Message-ID: References: <20250213200228.1993588-1-longman@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250213200228.1993588-1-longman@redhat.com> On Thu, Feb 13, 2025 at 03:02:24PM -0500, Waiman Long wrote: > v3: > - Add another patch to insert lock events into lockdep.c. > - Rerun all the tests with the simpler defconfig kernel build and do > further analysis of the of the performance difference between the > the RT and non-RT debug kernels. > > v4: > - Update test results in patch 3 after incorporating CONFIG_KASAN_INLINE > into the test matrix. > - Add patch 4 to call kasan_check_byte() in lock_acquire. > > 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 patches to add locking events to the rtmutex > slow paths and the lockdep code for better analysis of the different > performance behavior between RT and non-RT debug kernels. > Thank you, and thank Marco and Andrey for the reviews. Queued for v6.15. Regards, Boqun > Waiman Long (4): > locking/lock_events: Add locking events for rtmutex slow paths > locking/lock_events: Add locking events for lockdep > locking/lockdep: Disable KASAN instrumentation of lockdep.c > locking/lockdep: Add kasan_check_byte() check in lock_acquire() > > kernel/locking/Makefile | 3 ++- > kernel/locking/lock_events_list.h | 29 +++++++++++++++++++++++++++++ > kernel/locking/lockdep.c | 22 +++++++++++++++++++++- > kernel/locking/rtmutex.c | 29 ++++++++++++++++++++++++----- > 4 files changed, 76 insertions(+), 7 deletions(-) > > -- > 2.48.1 >