linux-kernel - [PATCH tip/core/rcu 0/7] Miscellaneous fixes for 4.10

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Date:   Mon, 14 Nov 2016 08:56:48 -0800
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,
        dvhart@...ux.intel.com, fweisbec@...il.com, oleg@...hat.com,
        bobby.prani@...il.com
Subject: [PATCH tip/core/rcu 0/7] Miscellaneous fixes for 4.10

Hello!

This series contains miscellaneous fixes to RCU:

1.	Tighten up __call_rcu's alignment check for the rcu_head structure
	now that no arch does two-byte alignment of pointers.

2.	Remove obsolete comment about when rcu_check_callbacks() was invoked.

3.	Remove obsolete comment about which function opportunistically
	notes grace periods beginnings and endings.

4.	Update the RCU_TRACE Kconfig option's help text to note that
	it enables event tracing in addition to debugfs, courtesy of
	Nikolay Borisov.

5.	Add event tracing for long read-side delays in rcutorture
	in order to better debug too-short grace periods.

6.	Make expedited grace periods recheck dyntick-idle state to avoid
	sending needless IPIs.

7.	Don't kick CPUs unless there is grace-period activity currently
	in progress.

							Thanx, Paul

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

 include/trace/events/rcu.h |    5 ++++-
 kernel/rcu/rcutorture.c    |   11 ++++++++++-
 kernel/rcu/tree.c          |   17 ++++++-----------
 kernel/rcu/tree.h          |    1 +
 kernel/rcu/tree_exp.h      |   12 +++++++++++-
 lib/Kconfig.debug          |    3 ++-
 6 files changed, 34 insertions(+), 15 deletions(-)