From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 C664B3BB136 for ; Fri, 5 Jun 2026 05:41:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780638097; cv=none; b=N9Del2lJzPwioQAtktH710T4ULPxh/X2eS0nPnwDcHw4tZUhGuAqKZdskilQuvl2/6YDA3K0OBXymgBWdaX9sqi1r1DgodjPPcFvEHSiI4ZeMipnKwU7g6YJ7cwiOGqdz+xvhnICf8F02yTrX84oKJiUmZ/j+csIr0Dt+t0Qv+k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780638097; c=relaxed/simple; bh=Ls8jAn9uxSIuXUvxGwKTd0oyRzMQf9ICZGzwFlvvGEc=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=TyOIEOZPmXtcF0EJ+u+4iPMXXXdP/8qnWs/UlRdqzwycX0zj/X1xEX5QPf4B7h+EM0Fk2iI4hYTvdv+qhwxUiSqvfOu/Hj6Z/iAN4ymBlrFf1x5AeEuxOLs1t1kPlcui0x+T3ZFr6afVfASOEBxkmGnqurv62OKQLdYj+hmiLYc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jVLTKvnF; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="jVLTKvnF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E3E211F00893; Fri, 5 Jun 2026 05:41:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1780638095; bh=SPlBajyEY6daFB22p/LrTuA35kcRxPh5dhkRnYY+Ggo=; h=From:To:Cc:Subject:Date; b=jVLTKvnFEugQT3TkxhzyzswioUyN1v2R7LUBwa0MO1HPYDLZZmXXlTIlWa/XaAof/ QoSVg2JaZIRISAKY/DYK9rA/wFBEqvQmkiUL6K5wwXPC6u0cX9eO4MQRqt8Y8ZBs/v Gw7XGubeZhsbbTr0r83tp7/jwsDiR6SccghrbFjQcEEtBdADV0GkH+qWY02l5wHmHR 5ihNP/8mIu0Ty3O3UsYH+M58l80ThRyWOSnDdKSphSQ+ZudVZ9+F/IXZKmFO5kUmEv o4h1uZGe7BPbSiu0C2Xu5Xc5CTXt9NSptGaLyqOzhdQ5nDsKWvQYzsOJaLz1lFvfz8 oULA5ZNEeUGsw== Received: from phl-compute-05.internal (phl-compute-05.internal [10.202.2.45]) by mailfauth.phl.internal (Postfix) with ESMTP id 0DF60F40075; Fri, 5 Jun 2026 01:41:33 -0400 (EDT) Received: from phl-frontend-03 ([10.202.2.162]) by phl-compute-05.internal (MEProxy); Fri, 05 Jun 2026 01:41:33 -0400 X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: dmFkZTFc+6I5dnayd2BYaWnu3DfmchaRspDny6hXOeQ0WXB+cUQ8+NyHSxw59pEB4HYxYa hQ/jpd2pfuJ3tb8YfwNEy34LuyXTLFRcJbt/R3UZar0R7U6maQKv8Ka6NzqAWGME+IqBdu RQdq5hY1TEX4Mkzh6yYHh+p5reirdqtNwaqftTDkO7sP45Jaff/WH/0OIgW/vJp50latAm /rZjqCPZR5E6s9fBO3Fb5bdDNNFP7jhf5AaUB5cFypzcKqHlteCps9x6FxSEcbNaEgP8SO zQY036UKu1kACwxOSXMerD2djNH46JMVmwsHENjblrU+CF4vthjwdTe26BiLxe3GIJfiJG RjxR1yUIIVwSsXPKsrNdSCXGu6UprlEJkGbJ3B1VFu+tZg4rlXYG22BD0s8OrcXSQwm7NC l4CbhELYEZuVNoKuLdDMRZr6C/IjJWC97a4XxBGAxUFbF8LpyT/BC/HsxqwBEQ/HRLMbAh Dpp4/sZ1kF0bb4aiYj3m13E2PmMVn7cftH8o+dAQNxJdTp5fTb/EjC26ZGRBOA1Q80npOd 2Qex/+DWN7SgpELtlSBBcSbTL2nubPHJymTzywzvBJolNNEtkVlORFC1UwerW2cGz53Isx M8QJPTjEsaTF7VLs8NWwd5o0BuRMm78L/vG+Z9c0aa9bn7IoCunGEhauKf3Q X-ME-Proxy: Feedback-ID: i8dbe485b:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Fri, 5 Jun 2026 01:41:32 -0400 (EDT) From: Boqun Feng To: Peter Zijlstra Cc: Catalin Marinas , Will Deacon , Jonas Bonn , Stefan Kristiansson , Stafford Horne , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Arnd Bergmann , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , K Prateek Nayak , Boqun Feng , Waiman Long , Andrew Morton , Andrii Nakryiko , Eduard Zingerman , Alexei Starovoitov , Daniel Borkmann , Martin KaFai Lau , Kumar Kartikeya Dwivedi , Song Liu , Yonghong Song , Jiri Olsa , Shuah Khan , Miguel Ojeda , Gary Guo , =?UTF-8?q?Bj=C3=B6rn=20Roy=20Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Jinjie Ruan , Lyude Paul , Thomas Huth , Sohil Mehta , Pawan Gupta , Sean Christopherson , Nikunj A Dadhania , "Xin Li (Intel)" , Joel Fernandes , Andy Shevchenko , Randy Dunlap , Yury Norov , Sebastian Andrzej Siewior , linux-kernel@vger.kernel.org, linux-openrisc@vger.kernel.org, linux-s390@vger.kernel.org, linux-arch@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, rust-for-linux@vger.kernel.org Subject: [PATCH v3 00/13] Refcounted interrupt disable and SpinLockIrq for rust (Part 1) Date: Thu, 4 Jun 2026 22:41:15 -0700 Message-ID: <20260605054128.5925-1-boqun@kernel.org> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-arch@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi Peter, Please take a look at the v3 of refcounted interrupt disabling. Changes since v2: - Fix NMI_OFFSET underflow issue reported by sashiko. See patch #1 (__nmi_ext()) and #10 (__preempt_count_nmi_exit()) for details: we have to replace preempt_count_sub() with preempt_count_set(). - Add WARN_ON_ONCE(in_nmi()) in local_interrupt_disable() per Peter. - Remove the use of should_resched() in local_interrupt_enable(), see patch #13. - Remove my gmail in SoB. v1: https://lore.kernel.org/rust-for-linux/20260508042111.24358-1-boqun@kernel.org/ v2: Boqun Feng (9): preempt: Introduce HARDIRQ_DISABLE_BITS preempt: Introduce __preempt_count_{sub, add}_return() irq & spin_lock: Add counted interrupt disabling/enabling locking: Switch to _irq_{disable,enable}() variants in cleanup guards sched: Remove the unused preempt_offset parameter of __cant_sleep() sched: Avoid signed comparison of preempt_count() in __cant_migrate() preempt: Introduce HAS_SEPARATE_PREEMPT_RESCHED_BITS arm64: sched/preempt: Enable HAS_SEPARATE_PREEMPT_RESCHED_BITS irq: Optimize reschedule check in local_interrupt_enable() Heiko Carstens (1): s390/preempt: Enable HAS_SEPARATE_PREEMPT_RESCHED_BITS Joel Fernandes (1): preempt: Track NMI nesting to separate per-CPU counter Lyude Paul (2): openrisc: Include in smp.h irq: Add KUnit test for refcounted interrupt enable/disable arch/arm64/Kconfig | 1 + arch/arm64/include/asm/preempt.h | 18 +++ arch/openrisc/include/asm/smp.h | 2 + arch/s390/Kconfig | 1 + arch/s390/include/asm/lowcore.h | 13 ++- arch/s390/include/asm/preempt.h | 49 ++++---- arch/x86/Kconfig | 1 + arch/x86/include/asm/preempt.h | 61 +++++++--- arch/x86/kernel/cpu/common.c | 2 +- include/asm-generic/preempt.h | 14 +++ include/linux/hardirq.h | 41 ++++++- include/linux/interrupt_rc.h | 76 ++++++++++++ include/linux/kernel.h | 4 +- include/linux/preempt.h | 35 ++++-- include/linux/spinlock.h | 49 +++++--- include/linux/spinlock_api_smp.h | 41 +++++++ include/linux/spinlock_api_up.h | 16 +++ include/linux/spinlock_rt.h | 18 +++ kernel/Kconfig.preempt | 4 + kernel/irq/Makefile | 1 + kernel/irq/refcount_interrupt_test.c | 109 ++++++++++++++++++ kernel/locking/spinlock.c | 29 +++++ kernel/sched/core.c | 18 ++- kernel/softirq.c | 22 +++- lib/locking-selftest.c | 2 +- .../testing/selftests/bpf/bpf_experimental.h | 7 +- 26 files changed, 554 insertions(+), 80 deletions(-) create mode 100644 include/linux/interrupt_rc.h create mode 100644 kernel/irq/refcount_interrupt_test.c -- 2.51.0