linux-kernel - [PATCH 0/2] Modify RCU Tasks to scan idle tasks

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Message-Id: <20240807163506.434885-1-neeraj.upadhyay@kernel.org>
Date: Wed,  7 Aug 2024 22:05:04 +0530
From: neeraj.upadhyay@...nel.org
To: rcu@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	paulmck@...nel.org,
	joel@...lfernandes.org,
	frederic@...nel.org,
	boqun.feng@...il.com,
	urezki@...il.com,
	rostedt@...dmis.org,
	mathieu.desnoyers@...icios.com,
	jiangshanlai@...il.com,
	qiang.zhang1211@...il.com,
	neeraj.iitr10@...il.com,
	Neeraj Upadhyay <neeraj.upadhyay@...nel.org>
Subject: [PATCH 0/2] Modify RCU Tasks to scan idle tasks

From: Neeraj Upadhyay <neeraj.upadhyay@...nel.org>

Architectures for which all deep-idle and entry-exit functions are
marked noinstr, synchronize_rcu_tasks_rude() is not required. However,
disabling synchronize_rcu_tasks_rude() for such architectures require
RCU-tasks to pay attention to idle tasks until they enter the context
where RCU is not watching. In addition, NMI context need to track RCU-tasks
entry/exit for NO_HZ_FULL CPUs. This series adds changes for both of
these requirements.

The series is available in git tree at:
https://git.kernel.org/pub/scm/linux/kernel/git/neeraj.upadhyay/linux-rcu.git/log/?h=rcu-tasks-watch-idle.07.08.24a


- Neeraj


Neeraj Upadhyay (2):
  rcu-tasks: Make RCU-Tasks pay attention to idle tasks
  context_tracking: Invoke Tasks-RCU enter/exit for NMI context

 .../RCU/Design/Requirements/Requirements.rst  |  12 +-
 kernel/context_tracking.c                     |   6 +-
 kernel/rcu/rcu.h                              |   4 +
 kernel/rcu/tasks.h                            | 107 ++++++++++++------
 kernel/rcu/tree.c                             |  12 +-
 kernel/rcu/tree_exp.h                         |   2 +-
 6 files changed, 91 insertions(+), 52 deletions(-)

-- 
2.40.1