From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mta0.migadu.com (out-82.mta0.migadu.com [91.218.175.82]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C75093EB81E for ; Fri, 4 Sep 2026 08:31:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.82 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788510662; cv=none; b=I3I67YhZ6krYOACYDkFdBCsZoD5Oa7gLBb6f2mMte/5Hs8CnuSJmkegNHxvx1Ox3dTv88co6XZStf/4jxHZG4o/6Y1pBTb+gu0FXgeW0LYTai+DcSXcXZJNbVw9TiTnwmjG6ZiMdhlqJAZgY9YHGNawg+naQbHnwZzzik9Tg42Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788510662; c=relaxed/simple; bh=zNZNbxef7ai/LHUf0K6ynGA+nqcp5AyWnJqAIFdVGFU=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=eaVGe5nJONpaUWo+YjLmUdiphrKXjMpCsRvbp4n5yh0nZI6luD89h9NyeogBCpLLyl+TKX/gL8IERIw4MUQWXjraalctj4S9dvGMyJn/oX65tkLdigxc7+reg99MTKramL1qFrHivWF8bK5u9Vf5Tjt+flMqwiS+UUWd3zgR4SE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=K52Eg0un; arc=none smtp.client-ip=91.218.175.82 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="K52Eg0un" X-Envelope-To: linux-fsdevel@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=zNZNbxef7ai/LHUf0K6ynGA+nqcp5AyWnJqAIFdVGFU=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1788510658; v=1; x=1789115458; b=K52Eg0unEuxAhK4JUB7s+FYXT8BjSptu6SKaIqTsfBAKzGQwLUJPS5a6JL4+bFJ+oMYxVtZG no0b6KcfYILOWrmfKHmfSu4J9Ps6bEr+4xPVvJUvTQykE3gE8rKcy4gqSVp0CrPybie3Lymo7wx /mu7bBDwiJY45ZDp65UgxM00= X-Envelope-To: linux-fsdevel@vger.kernel.org Received: by smtp.migadu.com with ESMTPS id f9c1eba717240c49; Fri, 04 Sep 2026 08:30:58 +0000 X-Mizu-Trace-ID: f9c1eba717240c49 X-Migadu-Flow: FLOW_OUT From: Ye Liu To: Tony Luck , Reinette Chatre , x86@kernel.org, Christian Brauner , Andrew Morton , Jann Horn , "David Hildenbrand (arm)" , "Mike Rapoport (Microsoft)" , Alexey Dobriyan , Lorenzo Stoakes , Oleg Nesterov Cc: Ye Liu , Dave Martin , James Morse , Babu Moger , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH 6/8] fs: convert process/thread iterators to for_each_*_rcu Date: Fri, 4 Sep 2026 16:29:58 +0800 Message-Id: <20260904083001.553587-7-ye.liu@linux.dev> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260904083001.553587-1-ye.liu@linux.dev> References: <20260904083001.553587-1-ye.liu@linux.dev> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Ye Liu Replace the manual rcu_read_lock()/rcu_read_unlock() pairs combined with for_each_process() and for_each_process_thread() loops in fs/ with the for_each_*_rcu() macros. No functional change. Signed-off-by: Ye Liu --- fs/proc/base.c | 4 +--- fs/resctrl/rdtgroup.c | 8 ++------ 2 files changed, 3 insertions(+), 9 deletions(-) diff --git a/fs/proc/base.c b/fs/proc/base.c index 6a39de424f62..da36ba73dc17 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -1160,8 +1160,7 @@ static int __set_oom_adj(struct file *file, int oom_adj, bool legacy) if (mm) { struct task_struct *p; - rcu_read_lock(); - for_each_process(p) { + for_each_process_rcu(p) { if (same_thread_group(task, p)) continue; @@ -1177,7 +1176,6 @@ static int __set_oom_adj(struct file *file, int oom_adj, bool legacy) } task_unlock(p); } - rcu_read_unlock(); mmdrop(mm); } err_unlock: diff --git a/fs/resctrl/rdtgroup.c b/fs/resctrl/rdtgroup.c index 5dcbb0a964e8..3f96d21b84ab 100644 --- a/fs/resctrl/rdtgroup.c +++ b/fs/resctrl/rdtgroup.c @@ -709,14 +709,12 @@ int rdtgroup_tasks_assigned(struct rdtgroup *r) lockdep_assert_held(&rdtgroup_mutex); - rcu_read_lock(); - for_each_process_thread(p, t) { + for_each_process_thread_rcu(p, t) { if (is_closid_match(t, r) || is_rmid_match(t, r)) { ret = 1; break; } } - rcu_read_unlock(); return ret; } @@ -826,15 +824,13 @@ static void show_rdt_tasks(struct rdtgroup *r, struct seq_file *s) struct task_struct *p, *t; pid_t pid; - rcu_read_lock(); - for_each_process_thread(p, t) { + for_each_process_thread_rcu(p, t) { if (is_closid_match(t, r) || is_rmid_match(t, r)) { pid = task_pid_vnr(t); if (pid) seq_printf(s, "%d\n", pid); } } - rcu_read_unlock(); } static int rdtgroup_tasks_show(struct kernfs_open_file *of, -- 2.25.1