From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 91C2F217F23 for ; Wed, 5 Feb 2025 01:24:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738718670; cv=none; b=GDOLlWnvVUwBit4GbiM8J4XWkRzLOsUAvwcIxTYxrjwz2roYk6cX0cN/pTwFUVbWuPBrO493ivejhrgrAUBPKYuu0b6m2Fcxdsam3gTPMz5D1whonKZ2Az45SfIcHaSLvYhkCn06bLMmXmKhmtO+FhWq0CfKmiVgPL4nVuylUo4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738718670; c=relaxed/simple; bh=D76DdDu/KIcNppdMJuY+6T/bglSa/kXluVHjGUlVGZ4=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=fja+m8DJIgCGOWFGY7Cgthez0ZoUT0Q+aRGFzbe7oqif+R3ZsXYB8HpzroRpu7TVMBR7ISnEQGmkutDsj9Wm8Icivl27G8dcLYCMhnn7g6yC7C5sv7+XSynOwIKh2uKSVEK6DVFls2CboqPh3HGI52+vnjBMdft0PnMYOdlG/+4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=gGbo0p3V; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="gGbo0p3V" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1738718667; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=P07bISyLWOjrUwvOzYRUy1eCpbEvkKaKKbfklK3/JZ8=; b=gGbo0p3V/dU9xo74X0+cn/JRmiw1sfLLcMqGbfyoYN6hnOqdscx5UOPP9Qv/P2YiVRd5zQ /1rO6U+Oo+uFmO/40Vtlu/dEIjh3m10en1qjG27reSqyGARAAtyRjBdC0TaSUEshI0LXKP +GxNl7nixuGRZqlzeQibB+acpgmMuqs= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-611-RdsdDe6UPYGKDQdqSq1KPg-1; Tue, 04 Feb 2025 20:24:23 -0500 X-MC-Unique: RdsdDe6UPYGKDQdqSq1KPg-1 X-Mimecast-MFC-AGG-ID: RdsdDe6UPYGKDQdqSq1KPg Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 9B482195609E; Wed, 5 Feb 2025 01:24:21 +0000 (UTC) Received: from llong-thinkpadp16vgen1.westford.csb (unknown [10.22.81.83]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 23CDC19560A7; Wed, 5 Feb 2025 01:24:19 +0000 (UTC) From: Waiman Long To: Peter Zijlstra , Ingo Molnar , Will Deacon , Boqun Feng Cc: linux-kernel@vger.kernel.org, Waiman Long Subject: [PATCH v2 0/2] locking/lockdep: Disable KASAN instrumentation of lockdep.c Date: Tue, 4 Feb 2025 20:24:09 -0500 Message-ID: <20250205012411.1010817-1-longman@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 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