From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: linux-kernel@vger.kernel.org
Cc: mingo@elte.hu, laijs@cn.fujitsu.com, dipankar@in.ibm.com,
akpm@linux-foundation.org, mathieu.desnoyers@polymtl.ca,
josh@joshtriplett.org, niv@us.ibm.com, tglx@linutronix.de,
peterz@infradead.org, rostedt@goodmis.org,
Valdis.Kletnieks@vt.edu, dhowells@redhat.com,
eric.dumazet@gmail.com, darren@dvhart.com, fweisbec@gmail.com,
patches@linaro.org
Subject: [PATCH RFC 0/41] RCU commits for 3.4
Date: Wed, 1 Feb 2012 11:41:31 -0800 [thread overview]
Message-ID: <20120201194131.GA10028@linux.vnet.ibm.com> (raw)
Hello!
This patchset makes RCU more aggressive about entering dyntick-idle mode
in order to improve energy efficiency, converts a few more call_rcu()s to
kfree_rcu(), applies a number of rcutree fixes and cleanups to rcutiny,
removes CONFIG_SMP #ifdef from treercu, allows RCU CPU stall times to
be set via sysfs, add CPU-stall capability to rcutorture, adds more
RCU-abuse diagnostics, updates documentation, and yet more fixes from
the still-ongoing top-to-bottom inspection of RCU with a special focus
on the CPU-hotplug code path. The patches are as follows:
1,26,41,40.
Documentation upgrades.
2. Improve synchronize_rcu() diagnostics, courtesy of
Frederic Weisbecker.
3. Add lockdep-RCU checks for simple self deadlock, such as calling
synchronize_rcu() while in an RCU read-side critical section.
4. Add a diagnostic for misaligned rcu_head structures. This is
preparation for a call_rcu_lazy() for added energy efficiency.
5,14,36.
Upgrades to CONFIG_RCU_FAST_NO_HZ.
6. Move CONFIG_RCU_TRACE to lib/Kconfig.debug: not for production use.
7-11. Convert several call_rcu() primitives to kfree_rcu().
12,13,15,16,37-39.
Fixes to and streamlining of CPU-hotplug handling based on review.
17. Remove dubious single-rcu_node optimization from rcu_start_gp().
18-22. Apply prior rcutree fixes to rcutiny.
23. Catch rcu_preempt_needs_cpu()'s name up with 2011.
24. Check for idle-loop entry while in an RCU read-side critical section.
25. Check for sleeping in TREE_RCU read-side critical sections.
27,35. Remove "#ifdef CONFIG_SMP" from treercu, move code accordingly.
28. Allow RCU CPU stall times to be adjusted at runtime via sysfs.
29. Print scheduling-clock timer information on RCU CPU stall warning
messages if requested by CONFIG_RCU_CPU_STALL_INFO config parameter.
30. Allow rcutorture to be told to hold off CPU-hotplug operations during
early boot.
31. Allow rcutorture to generate CPU stalls in order to test RCU CPU
stall warning facility.
33. Silence module-parameter warnings by converting a couple of
rcutorture's module parameters to bool.
34. Check for illegal use of RCU from offlined CPUs.
41. Fix misplaced NULL-pointer check in rcutorture.
For a testing-only version of this patchset from git, please see the
following subject-to-rebase branch:
git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/dev
Thanx, Paul
------------------------------------------------------------------------
Documentation/RCU/torture.txt | 18
b/Documentation/RCU/RTFP.txt | 1910 ++++++++++++++++++++++++++++++++++---
b/Documentation/RCU/checklist.txt | 14
b/Documentation/RCU/stallwarn.txt | 85 +
b/Documentation/RCU/torture.txt | 15
b/Documentation/RCU/trace.txt | 36
b/arch/s390/kernel/irq.c | 9
b/drivers/target/tcm_fc/tfc_sess.c | 12
b/include/linux/rcupdate.h | 2
b/include/linux/rcutiny.h | 6
b/include/linux/rcutree.h | 1
b/include/linux/sched.h | 3
b/include/linux/srcu.h | 11
b/include/trace/events/rcu.h | 63 -
b/init/Kconfig | 9
b/kernel/lockdep.c | 8
b/kernel/rcu.h | 4
b/kernel/rcupdate.c | 5
b/kernel/rcutiny.c | 3
b/kernel/rcutiny_plugin.h | 4
b/kernel/rcutorture.c | 4
b/kernel/rcutree.c | 6
b/kernel/rcutree.h | 3
b/kernel/rcutree_plugin.h | 3
b/kernel/rcutree_trace.c | 8
b/kernel/srcu.c | 4
b/lib/Kconfig.debug | 9
b/net/ipv4/cipso_ipv4.c | 11
b/net/ipv4/ip_sockglue.c | 7
b/net/mac80211/mesh_pathtbl.c | 8
include/linux/rcupdate.h | 40
include/linux/rcutiny.h | 4
include/linux/rcutree.h | 18
kernel/rcutiny.c | 4
kernel/rcutiny_plugin.h | 72 +
kernel/rcutorture.c | 83 +
kernel/rcutree.c | 641 ++++++++----
kernel/rcutree.h | 24
kernel/rcutree_plugin.h | 443 +++++---
kernel/rcutree_trace.c | 6
kernel/srcu.c | 27
lib/Kconfig.debug | 14
42 files changed, 2954 insertions(+), 703 deletions(-)
next reply other threads:[~2012-02-01 19:43 UTC|newest]
Thread overview: 104+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-01 19:41 Paul E. McKenney [this message]
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 01/41] rcu: Bring RTFP.txt up to date Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 02/41] rcu: Improve synchronize_rcu() diagnostics Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 03/41] rcu: Add lockdep-RCU checks for simple self-deadlock Paul E. McKenney
2012-02-02 0:55 ` Josh Triplett
2012-02-02 16:20 ` Paul E. McKenney
2012-02-02 19:56 ` Josh Triplett
2012-02-02 20:42 ` Paul E. McKenney
2012-02-03 9:04 ` Josh Triplett
2012-02-03 18:05 ` Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 04/41] rcu: Add diagnostic for misaligned rcu_head structures Paul E. McKenney
2012-02-02 1:00 ` Josh Triplett
2012-02-02 16:22 ` Paul E. McKenney
2012-02-02 20:11 ` Josh Triplett
2012-02-02 1:01 ` Josh Triplett
2012-02-02 16:27 ` Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 05/41] rcu: Avoid waking up CPUs having only kfree_rcu() callbacks Paul E. McKenney
2012-02-02 1:15 ` Josh Triplett
2012-02-02 16:34 ` Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 06/41] rcu: Move RCU_TRACE to lib/Kconfig.debug Paul E. McKenney
2012-02-02 1:39 ` Josh Triplett
2012-02-02 17:05 ` Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 07/41] s390: Convert call_rcu() to kfree_rcu() Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 08/41] tcm_fc: " Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 09/41] ipv4: " Paul E. McKenney
2012-02-01 19:49 ` David Miller
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 10/41] " Paul E. McKenney
2012-02-01 19:50 ` David Miller
2012-02-02 0:24 ` Josh Triplett
2012-02-02 15:56 ` Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 11/41] mac80211: " Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 12/41] rcu: Simplify offline processing Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 13/41] rcu: Make rcutorture flag online/offline failures Paul E. McKenney
2012-02-02 1:46 ` Josh Triplett
2012-02-02 17:08 ` Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 14/41] rcu: Limit lazy-callback duration Paul E. McKenney
2012-02-02 2:03 ` Josh Triplett
2012-02-02 17:13 ` Paul E. McKenney
2012-02-03 4:07 ` Josh Triplett
2012-02-03 5:54 ` Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 15/41] rcu: Check for callback invocation from offline CPUs Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 16/41] rcu: Don't make callbacks go through second full grace period Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 17/41] rcu: Remove single-rcu_node optimization in rcu_start_gp() Paul E. McKenney
2012-02-02 2:13 ` Josh Triplett
2012-02-02 17:16 ` Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 18/41] rcu: Protect __rcu_read_unlock() against scheduler-using irq handlers Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 19/41] rcu: Streamline code produced by __rcu_read_unlock() Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 20/41] rcu: Prevent RCU callbacks from executing before scheduler initialized Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 21/41] rcu: Inform RCU of irq_exit() activity Paul E. McKenney
2012-02-02 2:30 ` Josh Triplett
2012-02-02 17:30 ` Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 22/41] rcu: Simplify unboosting checks Paul E. McKenney
2012-02-02 2:38 ` Josh Triplett
2012-02-02 17:48 ` Paul E. McKenney
2012-02-03 4:23 ` Josh Triplett
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 23/41] rcu: Clean up straggling rcu_preempt_needs_cpu() name Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 24/41] rcu: Check for idle-loop entry while in RCU read-side critical section Paul E. McKenney
2012-02-02 5:13 ` Josh Triplett
2012-02-02 17:50 ` Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 25/41] rcu: Make rcu_sleep_check() also check rcu_lock_map Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 26/41] rcu: Note that rcu_access_pointer() can be used for teardown Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 27/41] rcu: Remove #ifdef CONFIG_SMP from TREE_RCU Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 28/41] rcu: Set RCU CPU stall times via sysfs Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 29/41] rcu: Print scheduling-clock information on RCU CPU stall-warning messages Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 30/41] rcutorture: Permit holding off CPU-hotplug operations during boot Paul E. McKenney
2012-02-02 5:43 ` Josh Triplett
2012-02-02 17:56 ` Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 31/41] rcu: Add CPU-stall capability to rcutorture Paul E. McKenney
2012-02-02 5:53 ` Josh Triplett
2012-02-02 9:15 ` Julia Lawall
2012-02-02 18:03 ` Paul E. McKenney
2012-02-02 18:00 ` Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 32/41] rcu: Update stall-warning documentation Paul E. McKenney
2012-02-02 5:56 ` Josh Triplett
2012-02-02 18:18 ` Paul E. McKenney
2012-02-03 5:42 ` Josh Triplett
2012-02-03 5:58 ` Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 33/41] rcu: Make boolean rcutorture parameters be of type "bool" Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 34/41] rcu: Check for illegal use of RCU from offlined CPUs Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 35/41] rcu: Move synchronize_sched_expedited() to rcutree.c Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 36/41] rcu: No interrupt disabling for rcu_prepare_for_idle() Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 37/41] lockdep: Add CPU-idle/offline warning to lockdep-RCU splat Paul E. McKenney
2012-02-02 6:07 ` Josh Triplett
2012-02-02 18:30 ` Paul E. McKenney
2012-02-03 6:12 ` Josh Triplett
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 38/41] rcu: Rework detection of use of RCU by offline CPUs Paul E. McKenney
2012-02-02 6:11 ` Josh Triplett
2012-02-02 18:31 ` Paul E. McKenney
2012-02-03 9:17 ` Josh Triplett
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 39/41] rcu: Wait at least a jiffy before declaring a CPU to be offline Paul E. McKenney
2012-02-02 6:12 ` Josh Triplett
2012-02-02 18:27 ` Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 40/41] rcu: Call out dangers of expedited RCU primitives Paul E. McKenney
2012-02-01 19:41 ` [PATCH RFC tip/core/rcu 41/41] rcu: Trace only after NULL-pointer check Paul E. McKenney
2012-02-02 0:18 ` [PATCH RFC tip/core/rcu 01/41] rcu: Bring RTFP.txt up to date Josh Triplett
2012-02-02 1:33 ` Paul E. McKenney
2012-02-02 2:01 ` Josh Triplett
2012-02-02 16:47 ` Paul E. McKenney
2012-02-02 22:32 ` Josh Triplett
2012-02-03 18:00 ` Paul E. McKenney
2012-02-02 22:47 ` [PATCH RFC 0/41] RCU commits for 3.4 Kevin Hilman
2012-02-02 23:58 ` Paul E. McKenney
2012-02-03 19:54 ` Kevin Hilman
2012-02-06 7:04 ` Paul E. McKenney
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