linux-kernel - [PATCH tip/core/rcu 0/12] CPU-hotplug updates

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Message-Id: <20170724215139.GA10881@linux.vnet.ibm.com>
Date:   Mon, 24 Jul 2017 14:51:39 -0700
From:   "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:     linux-kernel@...r.kernel.org
Cc:     mingo@...nel.org, jiangshanlai@...il.com, dipankar@...ibm.com,
        akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
        josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
        rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
        fweisbec@...il.com, oleg@...hat.com
Subject: [PATCH tip/core/rcu 0/12] CPU-hotplug updates

Hello!

This series updates RCU's interaction with CPU hotplug, perhaps most
notably making callback migration happen very shortly after the outgoing
CPU is gone.

1.	Make expedited GPs correctly handle hardware CPU insertion.

2.	Migrate callbacks earlier in the CPU-offline timeline.

3.	Fix typo suppressing CPU-hotplug statistics.

4.	Remove orphan/adopt event-tracing fields.

5.	Check for NOCB CPUs and empty lists earlier in CB migration.

6.	Make NOCB CPUs migrate CBs directly from outgoing CPU.

7.	Advance outgoing CPU's callbacks before migrating them.

8.	Eliminate rcu_state ->orphan_lock.

9.	Advance callbacks after migration.

10.	Localize rcu_state ->orphan_pend and ->orphan_done.

11.	Remove unused RCU list functions.

12.	Move callback-list warning to irq-disable region, thus suppressing
	rare but real false-positive dmesg splats.

							Thanx, Paul

------------------------------------------------------------------------

 include/linux/rcupdate.h   |    1 
 kernel/cpu.c               |    1 
 kernel/rcu/rcu_segcblist.c |  108 +++-----------
 kernel/rcu/rcu_segcblist.h |   28 ---
 kernel/rcu/tree.c          |  342 +++++++++++++++++++--------------------------
 kernel/rcu/tree.h          |   13 -
 kernel/rcu/tree_exp.h      |    2 
 kernel/rcu/tree_plugin.h   |   31 +---
 kernel/torture.c           |    2 
 9 files changed, 189 insertions(+), 339 deletions(-)