From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 63E2DC88E4C for ; Fri, 11 Sep 2026 07:58:31 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 55EBC6B008A; Fri, 11 Sep 2026 03:58:30 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 50FB06B008C; Fri, 11 Sep 2026 03:58:30 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3FD1D6B0092; Fri, 11 Sep 2026 03:58:30 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 15CBC6B008A for ; Fri, 11 Sep 2026 03:58:30 -0400 (EDT) Received: from smtpin22.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 6E39CC0132 for ; Fri, 11 Sep 2026 07:58:29 +0000 (UTC) X-FDA: 85200729138.22.E0D1834 Received: from mta0.migadu.com (out-197.mta0.migadu.com [91.218.175.197]) by imf13.hostedemail.com (Postfix) with ESMTP id 7825720004 for ; Fri, 11 Sep 2026 07:58:24 +0000 (UTC) Authentication-Results: imf13.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=czgAtOF3; spf=pass (imf13.hostedemail.com: domain of ye.liu@linux.dev designates 91.218.175.197 as permitted sender) smtp.mailfrom=ye.liu@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1789113504; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding:in-reply-to: references:dkim-signature; bh=wOgTCEbQYAco9Y4McmPRaV1mhNoWht7hjNtbhEmX5no=; b=8dkiiClEB+zfA95uTG7lLCYzEb/t2cXOZNGAi3Q4/2QewkSFR1/lq8RztP/mYITV06Dl/J HC8RP/KURrtCimaPaNcC9tWbABR8wD3u/ue1e0LVNZ3ZL2ZvbZYt6dPJDB6ziIKj2g0XBa nC5oq8x2yfy7G0KS3yLrRMrdjJpHe0c= ARC-Authentication-Results: i=1; imf13.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=czgAtOF3; spf=pass (imf13.hostedemail.com: domain of ye.liu@linux.dev designates 91.218.175.197 as permitted sender) smtp.mailfrom=ye.liu@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1789113504; b=8APpVgif2L1/DCLdbmI7EIasbPyKrRVo6aIHquMhyWZYOCSJO3zjg/txT0ng/P2JTtHtoK 5KBUAW32WLngI48vOnBlfyRLWBRPO14v9qCgdkSZ6uLt69rdiXTxxfnLKBb8/CgvvK2sne /jbe+ofqt0VJkAKa4RKRXK10cZFhBxs= X-Envelope-To: linux-mm@kvack.org DKIM-Signature: a=rsa-sha256; bh=2z6K28VZFghAvaOC2rxcV8P37YjNcXnY9WqrSWMHQ/k=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1789113497; v=1; x=1789718297; b=czgAtOF3JlWxuaKbHd6nJn+3vEEx++yytKytXfhgizpNlKXoBu0iIPbhZbr1uCfHrYUvkPQD pkP6XMVK5eXLDp8cDD9X27POKFZ1M6XVUvSlRcXc7oWwe48CfuZxUSc6jmc7O3rXoKS75h0w7Ex c/9gvUSCt+YiV0IBUdtl2XfQ= X-Envelope-To: linux-mm@kvack.org Received: by smtp.migadu.com with ESMTPS id 08c4df989fc31bb8; Fri, 11 Sep 2026 07:58:16 +0000 X-Mizu-Trace-ID: 08c4df989fc31bb8 X-Migadu-Flow: FLOW_OUT From: Ye Liu To: Andrew Morton , Michal Hocko , Peter Zijlstra , "Paul E. McKenney" , Ingo Molnar , Steven Rostedt , Josh Poimboeuf , =?UTF-8?q?Micka=C3=ABl=20Sala=C3=BCn?= , Oleg Nesterov , Thomas Gleixner Cc: Ye Liu , David Hildenbrand , Miaohe Lin , Naoya Horiguchi , "Rafael J. Wysocki" , =?UTF-8?q?G=C3=BCnther=20Noack?= , Lorenzo Stoakes , SJ Park , Gregory Price , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, rcu@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-security-module@vger.kernel.org, rientjes@google.com, shakeel.butt@linux.dev, xu.xin16@zte.com.cn, chengming.zhou@linux.dev, will@kernel.org, boqun@kernel.org, frederic@kernel.org, neeraj.upadhyay@kernel.org, joelagnelf@nvidia.com, josh@joshtriplett.org, urezki@gmail.com, juri.lelli@redhat.com, vincent.guittot@linaro.org, tony.luck@intel.com, reinette.chatre@intel.com, x86@kernel.org, paul@paul-moore.com, jmorris@namei.org, serge@hallyn.com, pavel@kernel.org, lance.yang@linux.dev, mhiramat@kernel.org, pmladek@suse.com, longman@redhat.com, mathieu.desnoyers@efficios.com, jiangshanlai@gmail.com, qiang.zhang@linux.dev, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, vschneid@redhat.com, kprateek.nayak@amd.com, mark.rutland@arm.com, Dave.Martin@arm.com, james.morse@arm.com, babu.moger@amd.com Subject: [PATCH v3 00/15] sched: introduce for_each_process_rculock and for_each_thread_rculock Date: Fri, 11 Sep 2026 15:57:45 +0800 Message-Id: <20260911075800.491472-1-ye.liu@linux.dev> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Stat-Signature: xgxojk66hjqf8sy84j9zm3w5hngunbow X-Rspamd-Queue-Id: 7825720004 X-Rspamd-Server: rspam07 X-HE-Tag: 1789113504-188800 X-HE-Meta: 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 co/4JYSR qaMy9CJshGMZ6WMsWYSkow94ogoZ7uJF5v/t+/e1L/MMO+VT515wxjf/skteD/0aEsAJBIkQqooIfsnH/kfXLpSkfP3+yRFcx9wwx4YFKZA3VOWNSm7CJ4CLriMZScPpCBjqFfA6CweT1xVz7nVCQOQmOnG4FgGM7nr9tUe3ZWhhdfNNdABgfoPTmzb4QqdaZFgZFzTIfETDLrWKWVJ4n7VBKqsCaBvhdTpqm0m82qzZqiJkYUt/XNsxJDBoQHxnz+LA83A9vQDmZl9z7wKFkcmejxWZOc0GLASP0gi+Y5+s69iusxc5FVp4Ub4SFTdMSq1S122f1jNU9CvFLiDbAUWJvDKwR+r8JZjPA1/onyYSptG4uuu2fcOWs9eqX6coY7alVHtnsp03GFMuowgqmxEMfyQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Ye Liu Introduce for_each_process_rculock(), for_each_thread_rculock() and for_each_process_thread_rculock() macros that combine the existing iteration macros with scoped_guard(rcu), so that the RCU read lock is automatically acquired before iteration and released when the loop exits — including via break, goto, or return. The rest of the series converts manual rcu_read_lock()/ rcu_read_unlock() and guard(rcu)() pairs across mm/, kernel/, fs/, lib/ and security/ to use the new macros. Suggested by Michal Hocko for the oom_kill path [2]. Signed-off-by: Ye Liu --- Changes since v2 [3]: - Split the kernel/ patch into per-subsystem patches, as the combined patch could not be applied (Peter Zijlstra, Steven Rostedt). - Move changelog below the --- separator so it is excluded from the commit message (Lorenzo Stoakes). - Indent loop body in macro definitions to show scoped_guard scope (Lorenzo Stoakes). Changes since v1 [1]: - Rename macros from *_rcu to *_rculock, as suggested by Steven Rostedt and acked by Thomas Gleixner, to avoid confusion with existing *_rcu() list iterators that expect the caller to hold the RCU read lock. - Improve the comment on for_each_process_thread_rculock() to document that 'break' only exits the inner loop and 'goto' is needed to exit both loops (Thomas Gleixner). - Rename the stale 'unlock:' label to 'out:' in hung_task.c, as noted by Günther Noack. - Clarify in patch 4 that page_pgoff() is safe outside the RCU read-side critical section (SJ Park). - CC all relevant maintainers on every patch (Lorenzo Stoakes). - Drop the mm: prefix from patch 1, as the macros are in include/linux/sched/signal.h (Michal Hocko). [1] https://lore.kernel.org/all/20260904083001.553587-1-ye.liu@linux.dev/ [2] https://lore.kernel.org/all/20260813092933.562028-1-ye.liu@linux.dev/ [3] https://lore.kernel.org/all/20260907081334.1152889-1-ye.liu@linux.dev/ Ye Liu (15): sched: introduce for_each_process_rculock and for_each_thread_rculock mm/oom_kill: convert process/thread iterators to for_each_*_rculock mm/ksm: convert process iterator to for_each_process_rculock mm/memory-failure: convert process iterator to for_each_process_rculock cpu/hotplug: convert thread iterator to for_each_thread_rculock freezer: convert thread iterator to for_each_thread_rculock hung_task: convert process/thread iterators to for_each_*_rculock locking/lockdep: convert process/thread iterators to for_each_*_rculock rcu: convert process/thread iterator to for_each_process_thread_rculock sched: convert process/thread iterators to for_each_*_rculock tracing/fgraph: convert process/thread iterator to for_each_process_thread_rculock unwind: convert process/thread iterator to for_each_process_thread_rculock fs: convert process/thread iterators to for_each_*_rculock lib: convert process iterator to for_each_process_rculock security/landlock: convert thread iterator to for_each_thread_rculock fs/proc/base.c | 4 +--- fs/resctrl/rdtgroup.c | 8 ++------ include/linux/sched/signal.h | 26 ++++++++++++++++++++++++++ kernel/cpu.c | 4 +--- kernel/freezer.c | 4 +--- kernel/hung_task.c | 11 ++++------- kernel/locking/lockdep.c | 4 +--- kernel/rcu/update.c | 4 +--- kernel/sched/core.c | 3 +-- kernel/sched/debug.c | 4 +--- kernel/trace/fgraph.c | 8 ++------ kernel/unwind/deferred.c | 3 +-- lib/is_single_threaded.c | 5 +---- mm/ksm.c | 4 +--- mm/memory-failure.c | 16 ++++------------ mm/oom_kill.c | 20 +++++--------------- security/landlock/tsync.c | 8 ++------ 17 files changed, 55 insertions(+), 81 deletions(-) -- 2.25.1