linux-kernel - [PATCH tip/core/rcu 0/9] Per-CPU-variable updates

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20141028215140.GA23970@linux.vnet.ibm.com>
Date:	Tue, 28 Oct 2014 14:51:40 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	mingo@...nel.org, laijs@...fujitsu.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 0/9] Per-CPU-variable updates

Hello!

This series updates RCU's handling of per-CPU variables, mostly
moving from "cpu" function arguments to various "this_"-style accessors
for per-CPU variables:

1.	Drop the rdtp argument from RCU's dyntick-idle and sysidle
	functions, substituting this_cpu_ptr(), courtesy of Christoph
	Lameter.

2.	Use DEFINE_PER_CPU_SHARED_ALIGNED for rcu_data structures in
	order to avoid false sharing with other per-CPU variables.

3-9.	Remove "cpu" arguments from a number of RCU functions that are
	only ever invoked on that CPU, and use appropriate "this_"-style
	accesssors for the per-CPU variables.

							Thanx, Paul

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

 b/include/linux/rcupdate.h |    2 +-
 b/include/linux/rcutiny.h  |    2 +-
 b/include/linux/rcutree.h  |    4 ++--
 b/kernel/cpu.c             |   19 +++++++++++++------
 b/kernel/rcu/tiny.c        |    2 +-
 b/kernel/rcu/tree.c        |   25 +++++++++++++------------
 b/kernel/rcu/tree.h        |    4 ++--
 b/kernel/rcu/tree_plugin.h |   11 +++++++----
 b/kernel/sched/core.c      |    2 +-
 b/kernel/softirq.c         |    2 +-
 b/kernel/time/tick-sched.c |    2 +-
 b/kernel/time/timer.c      |    3 +--
 include/linux/rcupdate.h   |    2 +-
 include/linux/rcutree.h    |    2 +-
 kernel/rcu/tree.c          |   30 +++++++++++++++---------------
 kernel/rcu/tree.h          |    8 ++++----
 kernel/rcu/tree_plugin.h   |   42 +++++++++++++++++++++---------------------
 17 files changed, 86 insertions(+), 76 deletions(-)

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/