From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: linux-kernel@vger.kernel.org
Cc: mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com,
akpm@linux-foundation.org, mathieu.desnoyers@efficios.com,
josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org,
rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com,
fweisbec@gmail.com, oleg@redhat.com, bobby.prani@gmail.com,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Subject: [PATCH v3 tip/core/rcu 32/40] srcu: Merge ->srcu_state into ->srcu_gp_seq
Date: Wed, 19 Apr 2017 09:58:29 -0700 [thread overview]
Message-ID: <1492621117-13939-32-git-send-email-paulmck@linux.vnet.ibm.com> (raw)
In-Reply-To: <20170419165805.GB10874@linux.vnet.ibm.com>
Updating ->srcu_state and ->srcu_gp_seq will lead to extremely complex
race conditions given multiple callback queues, so this commit takes
advantage of the two-bit state now available in rcu_seq counters to
store the state in the bottom two bits of ->srcu_gp_seq.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---
include/linux/srcu.h | 5 +----
kernel/rcu/rcu.h | 10 ++++++++++
kernel/rcu/srcu.c | 55 +++++++++++++++++++++++++++++++++-------------------
3 files changed, 46 insertions(+), 24 deletions(-)
diff --git a/include/linux/srcu.h b/include/linux/srcu.h
index ad154a7bc114..e7dbc01b61a1 100644
--- a/include/linux/srcu.h
+++ b/include/linux/srcu.h
@@ -43,8 +43,7 @@ struct srcu_struct {
unsigned long completed;
unsigned long srcu_gp_seq;
struct srcu_array __percpu *per_cpu_ref;
- spinlock_t queue_lock; /* protect ->srcu_cblist, ->srcu_state */
- int srcu_state;
+ spinlock_t queue_lock; /* protect ->srcu_cblist */
struct rcu_segcblist srcu_cblist;
struct delayed_work work;
#ifdef CONFIG_DEBUG_LOCK_ALLOC
@@ -56,7 +55,6 @@ struct srcu_struct {
#define SRCU_STATE_IDLE 0
#define SRCU_STATE_SCAN1 1
#define SRCU_STATE_SCAN2 2
-#define SRCU_STATE_DONE 3
#ifdef CONFIG_DEBUG_LOCK_ALLOC
@@ -85,7 +83,6 @@ void process_srcu(struct work_struct *work);
.completed = -300, \
.per_cpu_ref = &name##_srcu_array, \
.queue_lock = __SPIN_LOCK_UNLOCKED(name.queue_lock), \
- .srcu_state = SRCU_STATE_IDLE, \
.srcu_cblist = RCU_SEGCBLIST_INITIALIZER(name.srcu_cblist),\
.work = __DELAYED_WORK_INITIALIZER(name.work, process_srcu, 0),\
__SRCU_DEP_MAP_INIT(name) \
diff --git a/kernel/rcu/rcu.h b/kernel/rcu/rcu.h
index 87a0ac95b551..73e16ec4054b 100644
--- a/kernel/rcu/rcu.h
+++ b/kernel/rcu/rcu.h
@@ -82,6 +82,16 @@ static inline int rcu_seq_state(unsigned long s)
return s & RCU_SEQ_STATE_MASK;
}
+/*
+ * Set the state portion of the pointed-to sequence number.
+ * The caller is responsible for preventing conflicting updates.
+ */
+static inline void rcu_seq_set_state(unsigned long *sp, int newstate)
+{
+ WARN_ON_ONCE(newstate & ~RCU_SEQ_STATE_MASK);
+ WRITE_ONCE(*sp, (*sp & ~RCU_SEQ_STATE_MASK) + newstate);
+}
+
/* Adjust sequence number for start of update-side operation. */
static inline void rcu_seq_start(unsigned long *sp)
{
diff --git a/kernel/rcu/srcu.c b/kernel/rcu/srcu.c
index 1a2dc74bb625..90ffea31b188 100644
--- a/kernel/rcu/srcu.c
+++ b/kernel/rcu/srcu.c
@@ -44,7 +44,6 @@ static int init_srcu_struct_fields(struct srcu_struct *sp)
sp->completed = 0;
sp->srcu_gp_seq = 0;
spin_lock_init(&sp->queue_lock);
- sp->srcu_state = SRCU_STATE_IDLE;
rcu_segcblist_init(&sp->srcu_cblist);
INIT_DELAYED_WORK(&sp->work, process_srcu);
sp->per_cpu_ref = alloc_percpu(struct srcu_array);
@@ -180,6 +179,9 @@ static bool srcu_readers_active(struct srcu_struct *sp)
return sum;
}
+#define SRCU_CALLBACK_BATCH 10
+#define SRCU_INTERVAL 1
+
/**
* cleanup_srcu_struct - deconstruct a sleep-RCU structure
* @sp: structure to clean up.
@@ -200,8 +202,10 @@ void cleanup_srcu_struct(struct srcu_struct *sp)
if (WARN_ON(!rcu_segcblist_empty(&sp->srcu_cblist)))
return; /* Leakage unless caller handles error. */
flush_delayed_work(&sp->work);
- if (WARN_ON(READ_ONCE(sp->srcu_state) != SRCU_STATE_IDLE))
+ if (WARN_ON(rcu_seq_state(READ_ONCE(sp->srcu_gp_seq)) != SRCU_STATE_IDLE)) {
+ pr_info("cleanup_srcu_struct: Active srcu_struct %lu CBs %c state: %d\n", rcu_segcblist_n_cbs(&sp->srcu_cblist), ".E"[rcu_segcblist_empty(&sp->srcu_cblist)], rcu_seq_state(READ_ONCE(sp->srcu_gp_seq)));
return; /* Caller forgot to stop doing call_srcu()? */
+ }
free_percpu(sp->per_cpu_ref);
sp->per_cpu_ref = NULL;
}
@@ -253,10 +257,13 @@ EXPORT_SYMBOL_GPL(__srcu_read_unlock);
*/
static void srcu_gp_start(struct srcu_struct *sp)
{
+ int state;
+
rcu_segcblist_accelerate(&sp->srcu_cblist,
rcu_seq_snap(&sp->srcu_gp_seq));
- WRITE_ONCE(sp->srcu_state, SRCU_STATE_SCAN1);
rcu_seq_start(&sp->srcu_gp_seq);
+ state = rcu_seq_state(READ_ONCE(sp->srcu_gp_seq));
+ WARN_ON_ONCE(state != SRCU_STATE_SCAN1);
}
/*
@@ -300,7 +307,6 @@ static void srcu_flip(struct srcu_struct *sp)
static void srcu_gp_end(struct srcu_struct *sp)
{
rcu_seq_end(&sp->srcu_gp_seq);
- WRITE_ONCE(sp->srcu_state, SRCU_STATE_DONE);
spin_lock_irq(&sp->queue_lock);
rcu_segcblist_advance(&sp->srcu_cblist,
@@ -345,7 +351,7 @@ void call_srcu(struct srcu_struct *sp, struct rcu_head *head,
spin_lock_irqsave(&sp->queue_lock, flags);
smp_mb__after_unlock_lock(); /* Caller's prior accesses before GP. */
rcu_segcblist_enqueue(&sp->srcu_cblist, head, false);
- if (READ_ONCE(sp->srcu_state) == SRCU_STATE_IDLE) {
+ if (rcu_seq_state(READ_ONCE(sp->srcu_gp_seq)) == SRCU_STATE_IDLE) {
srcu_gp_start(sp);
queue_delayed_work(system_power_efficient_wq, &sp->work, 0);
}
@@ -378,7 +384,7 @@ static void __synchronize_srcu(struct srcu_struct *sp, int trycount)
head->func = wakeme_after_rcu;
spin_lock_irq(&sp->queue_lock);
smp_mb__after_unlock_lock(); /* Caller's prior accesses before GP. */
- if (READ_ONCE(sp->srcu_state) == SRCU_STATE_IDLE) {
+ if (rcu_seq_state(READ_ONCE(sp->srcu_gp_seq)) == SRCU_STATE_IDLE) {
/* steal the processing owner */
rcu_segcblist_enqueue(&sp->srcu_cblist, head, false);
srcu_gp_start(sp);
@@ -480,9 +486,6 @@ unsigned long srcu_batches_completed(struct srcu_struct *sp)
}
EXPORT_SYMBOL_GPL(srcu_batches_completed);
-#define SRCU_CALLBACK_BATCH 10
-#define SRCU_INTERVAL 1
-
/*
* Core SRCU state machine. Advance callbacks from ->batch_check0 to
* ->batch_check1 and then to ->batch_done as readers drain.
@@ -491,28 +494,40 @@ static void srcu_advance_batches(struct srcu_struct *sp, int trycount)
{
int idx;
- WARN_ON_ONCE(sp->srcu_state == SRCU_STATE_IDLE);
-
/*
* Because readers might be delayed for an extended period after
* fetching ->completed for their index, at any point in time there
* might well be readers using both idx=0 and idx=1. We therefore
* need to wait for readers to clear from both index values before
* invoking a callback.
+ *
+ * The load-acquire ensures that we see the accesses performed
+ * by the prior grace period.
*/
+ idx = rcu_seq_state(smp_load_acquire(&sp->srcu_gp_seq)); /* ^^^ */
+ if (idx == SRCU_STATE_IDLE) {
+ spin_lock_irq(&sp->queue_lock);
+ if (rcu_segcblist_empty(&sp->srcu_cblist)) {
+ spin_unlock_irq(&sp->queue_lock);
+ return;
+ }
+ idx = rcu_seq_state(READ_ONCE(sp->srcu_gp_seq));
+ if (idx == SRCU_STATE_IDLE)
+ srcu_gp_start(sp);
+ spin_unlock_irq(&sp->queue_lock);
+ if (idx != SRCU_STATE_IDLE)
+ return; /* Someone else started the grace period. */
+ }
- if (sp->srcu_state == SRCU_STATE_DONE)
- srcu_gp_start(sp);
-
- if (sp->srcu_state == SRCU_STATE_SCAN1) {
+ if (rcu_seq_state(READ_ONCE(sp->srcu_gp_seq)) == SRCU_STATE_SCAN1) {
idx = 1 ^ (sp->completed & 1);
if (!try_check_zero(sp, idx, trycount))
return; /* readers present, retry after SRCU_INTERVAL */
srcu_flip(sp);
- WRITE_ONCE(sp->srcu_state, SRCU_STATE_SCAN2);
+ rcu_seq_set_state(&sp->srcu_gp_seq, SRCU_STATE_SCAN2);
}
- if (sp->srcu_state == SRCU_STATE_SCAN2) {
+ if (rcu_seq_state(READ_ONCE(sp->srcu_gp_seq)) == SRCU_STATE_SCAN2) {
/*
* SRCU read-side critical sections are normally short,
@@ -563,14 +578,14 @@ static void srcu_invoke_callbacks(struct srcu_struct *sp)
static void srcu_reschedule(struct srcu_struct *sp, unsigned long delay)
{
bool pending = true;
+ int state;
if (rcu_segcblist_empty(&sp->srcu_cblist)) {
spin_lock_irq(&sp->queue_lock);
+ state = rcu_seq_state(READ_ONCE(sp->srcu_gp_seq));
if (rcu_segcblist_empty(&sp->srcu_cblist) &&
- READ_ONCE(sp->srcu_state) == SRCU_STATE_DONE) {
- WRITE_ONCE(sp->srcu_state, SRCU_STATE_IDLE);
+ state == SRCU_STATE_IDLE)
pending = false;
- }
spin_unlock_irq(&sp->queue_lock);
}
--
2.5.2
next prev parent reply other threads:[~2017-04-19 17:02 UTC|newest]
Thread overview: 176+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-12 17:40 [PATCH tip/core/rcu 0/40] SRCU callback parallelization for 4.12 Paul E. McKenney
2017-04-12 17:39 ` [PATCH tip/core/rcu 01/40] rcu: Maintain special bits at bottom of ->dynticks counter Paul E. McKenney
2017-04-13 9:20 ` Peter Zijlstra
2017-04-13 16:15 ` Paul E. McKenney
2017-04-12 17:39 ` [PATCH tip/core/rcu 02/40] rcu: Make arch select smp_mb__after_unlock_lock() strength Paul E. McKenney
2017-04-13 9:21 ` Peter Zijlstra
2017-04-13 16:17 ` Paul E. McKenney
2017-04-13 9:24 ` Peter Zijlstra
2017-04-13 16:26 ` Paul E. McKenney
2017-04-13 16:37 ` Peter Zijlstra
2017-04-13 17:03 ` Paul E. McKenney
2017-04-19 13:38 ` Michael Ellerman
2017-04-19 15:09 ` Paul E. McKenney
2017-04-12 17:39 ` [PATCH tip/core/rcu 03/40] srcu: Consolidate batch checking into rcu_all_batches_empty() Paul E. McKenney
2017-04-12 17:39 ` [PATCH tip/core/rcu 04/40] srcu: Check for tardy grace-period activity in cleanup_srcu_struct() Paul E. McKenney
2017-04-12 17:39 ` [PATCH tip/core/rcu 05/40] rcu: Semicolon inside RCU_TRACE() for rcu.h Paul E. McKenney
2017-04-12 17:39 ` [PATCH tip/core/rcu 06/40] rcu: Semicolon inside RCU_TRACE() for Tiny RCU Paul E. McKenney
2017-04-12 17:39 ` [PATCH tip/core/rcu 07/40] rcu: Semicolon inside RCU_TRACE() for tree.c Paul E. McKenney
2017-04-12 17:39 ` [PATCH tip/core/rcu 08/40] rcu: Make call_rcu() do deferred NOCB wakeups Paul E. McKenney
2017-04-12 17:39 ` [PATCH tip/core/rcu 09/40] rcu: Make rcu_all_qs() " Paul E. McKenney
2017-04-12 17:39 ` [PATCH tip/core/rcu 10/40] rcu: Make rcu_note_context_switch() " Paul E. McKenney
2017-04-12 17:39 ` [PATCH tip/core/rcu 11/40] rcu: Pull rcu_sched_qs_mask into rcu_dynticks structure Paul E. McKenney
2017-04-12 17:39 ` [PATCH tip/core/rcu 12/40] rcu: Pull rcu_qs_ctr " Paul E. McKenney
2017-04-12 17:39 ` [PATCH tip/core/rcu 13/40] rcu: Eliminate flavor scan in rcu_momentary_dyntick_idle() Paul E. McKenney
2017-04-12 17:39 ` [PATCH tip/core/rcu 14/40] rcu: Place guard on rcu_all_qs() and rcu_note_context_switch() actions Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 15/40] rcu: Default RCU_FANOUT_LEAF to 16 unless explicitly changed Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 16/40] srcu: Abstract multi-tail callback list handling Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 17/40] srcu: Allow SRCU to access rcu_scheduler_active Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 18/40] srcu: Allow early boot use of synchronize_srcu() Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 19/40] rcu: Add single-element dequeue functions to rcu_segcblist Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 20/40] srcu: Move rcu_seq_start() and friends to rcu.h Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 21/40] rcu: Expedited wakeups need to be fully ordered Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 22/40] rcu: Fix warning in rcu_seq_end() Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 23/40] srcu: Push srcu_advance_batches() fastpath into common case Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 24/40] srcu: Move to state-based grace-period sequencing Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 25/40] srcu: Add grace-period sequence numbers Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 26/40] srcu: Use rcu_segcblist to track SRCU callbacks Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 27/40] srcu: Move combining-tree definitions for SRCU's benefit Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 28/40] srcu: Move rcu_init_levelspread() to rcu_tree_node.h Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 29/40] rcu: Remove redundant levelcnt[] array from rcu_init_one() Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 30/40] srcu: Move rcu_node traversal macros to rcu.h Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 31/40] srcu: Make num_rcu_lvl[] array be external Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 32/40] srcu: Fix bogus try_check_zero() comment Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 33/40] srcu: Improve rcu_seq grace-period-counter abstraction Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 34/40] srcu: Allow a second bit in rcu_seq for SRCU state Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 35/40] srcu: Merge ->srcu_state into ->srcu_gp_seq Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 36/40] srcu: Crude control of expedited grace periods Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 37/40] srcu: Create a tiny SRCU Paul E. McKenney
2017-04-13 9:48 ` Peter Zijlstra
2017-04-13 16:30 ` Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 38/40] srcutorture: Print Tiny SRCU reader statistics Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 39/40] srcu: Introduce CLASSIC_SRCU Kconfig option Paul E. McKenney
2017-04-12 17:40 ` [PATCH tip/core/rcu 40/40] srcu: Parallelize callback handling Paul E. McKenney
2017-04-13 9:50 ` Peter Zijlstra
2017-04-13 16:37 ` Paul E. McKenney
2017-04-13 17:42 ` Paul E. McKenney
2017-04-13 9:54 ` Peter Zijlstra
2017-04-13 16:50 ` Paul E. McKenney
2017-04-20 3:40 ` powerpc KVM build break in linux-next (was Re: [PATCH tip/core/rcu 40/40] srcu: Parallelize callback handling) Michael Ellerman
2017-04-20 14:19 ` Paul E. McKenney
2017-04-20 15:28 ` Paolo Bonzini
2017-04-21 0:38 ` Paul E. McKenney
2017-04-21 1:42 ` Michael Ellerman
2017-04-21 4:17 ` Paul E. McKenney
2017-04-21 7:27 ` Paolo Bonzini
2017-04-21 12:51 ` Paul E. McKenney
2017-04-22 6:09 ` Michael Ellerman
2017-04-21 2:13 ` Michael Ellerman
2017-04-17 23:44 ` [PATCH v2 tip/core/rcu 0/40] SRCU callback parallelization for 4.12 Paul E. McKenney
2017-04-17 23:44 ` [PATCH v2 tip/core/rcu 01/39] rcu: Maintain special bits at bottom of ->dynticks counter Paul E. McKenney
2017-04-18 0:07 ` Josh Triplett
2017-04-18 18:19 ` Paul E. McKenney
2017-04-17 23:44 ` [PATCH v2 tip/core/rcu 02/39] rcu: Make arch select smp_mb__after_unlock_lock() strength Paul E. McKenney
2017-04-18 0:19 ` Josh Triplett
2017-04-17 23:44 ` [PATCH v2 tip/core/rcu 03/39] srcu: Consolidate batch checking into rcu_all_batches_empty() Paul E. McKenney
2017-04-18 0:30 ` Josh Triplett
2017-04-17 23:44 ` [PATCH v2 tip/core/rcu 04/39] srcu: Check for tardy grace-period activity in cleanup_srcu_struct() Paul E. McKenney
2017-04-18 0:33 ` Josh Triplett
2017-04-18 0:34 ` Josh Triplett
2017-04-18 18:34 ` Paul E. McKenney
2017-04-18 19:44 ` Josh Triplett
2017-04-17 23:44 ` [PATCH v2 tip/core/rcu 05/39] rcu: Semicolon inside RCU_TRACE() for rcu.h Paul E. McKenney
2017-04-17 23:44 ` [PATCH v2 tip/core/rcu 06/39] rcu: Semicolon inside RCU_TRACE() for Tiny RCU Paul E. McKenney
2017-04-17 23:44 ` [PATCH v2 tip/core/rcu 07/39] rcu: Semicolon inside RCU_TRACE() for tree.c Paul E. McKenney
2017-04-17 23:44 ` [PATCH v2 tip/core/rcu 08/39] rcu: Pull rcu_sched_qs_mask into rcu_dynticks structure Paul E. McKenney
2017-04-17 23:44 ` [PATCH v2 tip/core/rcu 09/39] rcu: Pull rcu_qs_ctr " Paul E. McKenney
2017-04-17 23:44 ` [PATCH v2 tip/core/rcu 10/39] rcu: Eliminate flavor scan in rcu_momentary_dyntick_idle() Paul E. McKenney
2017-04-17 23:44 ` [PATCH v2 tip/core/rcu 11/39] rcu: Place guard on rcu_all_qs() and rcu_note_context_switch() actions Paul E. McKenney
2017-04-17 23:44 ` [PATCH v2 tip/core/rcu 12/39] rcu: Default RCU_FANOUT_LEAF to 16 unless explicitly changed Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 13/39] srcu: Abstract multi-tail callback list handling Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 14/39] srcu: Allow SRCU to access rcu_scheduler_active Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 15/39] srcu: Allow early boot use of synchronize_srcu() Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 16/39] rcu: Add single-element dequeue functions to rcu_segcblist Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 17/39] srcu: Move rcu_seq_start() and friends to rcu.h Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 18/39] rcu: Expedited wakeups need to be fully ordered Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 19/39] rcu: Fix warning in rcu_seq_end() Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 20/39] srcu: Push srcu_advance_batches() fastpath into common case Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 21/39] srcu: Move to state-based grace-period sequencing Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 22/39] srcu: Add grace-period sequence numbers Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 23/39] srcu: Use rcu_segcblist to track SRCU callbacks Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 24/39] srcu: Move combining-tree definitions for SRCU's benefit Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 25/39] srcu: Move rcu_init_levelspread() to rcu_tree_node.h Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 26/39] rcu: Remove redundant levelcnt[] array from rcu_init_one() Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 27/39] srcu: Move rcu_node traversal macros to rcu.h Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 28/39] srcu: Make num_rcu_lvl[] array be external Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 29/39] srcu: Fix bogus try_check_zero() comment Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 30/39] srcu: Improve rcu_seq grace-period-counter abstraction Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 31/39] srcu: Allow a second bit in rcu_seq for SRCU state Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 32/39] srcu: Merge ->srcu_state into ->srcu_gp_seq Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 33/39] srcu: Crude control of expedited grace periods Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 34/39] mm: Use static initialization for "srcu" Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 35/39] srcu: Create a tiny SRCU Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 36/39] srcutorture: Print Tiny SRCU reader statistics Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 37/39] srcu: Introduce CLASSIC_SRCU Kconfig option Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 38/39] srcu: Parallelize callback handling Paul E. McKenney
2017-04-17 23:45 ` [PATCH v2 tip/core/rcu 39/39] rcu: Make non-preemptive schedule be Tasks RCU quiescent state Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 0/40] SRCU callback parallelization for 4.12 Paul E. McKenney
2017-04-19 16:57 ` [PATCH v3 tip/core/rcu 01/40] rcu: Maintain special bits at bottom of ->dynticks counter Paul E. McKenney
2017-04-19 16:57 ` [PATCH v3 tip/core/rcu 02/40] rcu: Make arch select smp_mb__after_unlock_lock() strength Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 03/40] srcu: Consolidate batch checking into rcu_all_batches_empty() Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 04/40] srcu: Check for tardy grace-period activity in cleanup_srcu_struct() Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 05/40] rcu: Semicolon inside RCU_TRACE() for rcu.h Paul E. McKenney
2017-04-19 17:41 ` Joe Perches
2017-04-25 21:00 ` Paul E. McKenney
2017-04-25 21:13 ` Steven Rostedt
2017-04-25 21:27 ` Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 06/40] rcu: Semicolon inside RCU_TRACE() for Tiny RCU Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 07/40] rcu: Semicolon inside RCU_TRACE() for tree.c Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 08/40] rcu: Pull rcu_sched_qs_mask into rcu_dynticks structure Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 09/40] rcu: Pull rcu_qs_ctr " Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 10/40] rcu: Eliminate flavor scan in rcu_momentary_dyntick_idle() Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 11/40] rcu: Place guard on rcu_all_qs() and rcu_note_context_switch() actions Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 12/40] rcu: Default RCU_FANOUT_LEAF to 16 unless explicitly changed Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 13/40] srcu: Abstract multi-tail callback list handling Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 14/40] srcu: Allow SRCU to access rcu_scheduler_active Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 15/40] srcu: Allow early boot use of synchronize_srcu() Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 16/40] rcu: Add single-element dequeue functions to rcu_segcblist Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 17/40] srcu: Move rcu_seq_start() and friends to rcu.h Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 18/40] rcu: Expedited wakeups need to be fully ordered Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 19/40] rcu: Fix warning in rcu_seq_end() Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 20/40] srcu: Push srcu_advance_batches() fastpath into common case Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 21/40] srcu: Move to state-based grace-period sequencing Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 22/40] srcu: Add grace-period sequence numbers Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 23/40] srcu: Use rcu_segcblist to track SRCU callbacks Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 24/40] srcu: Move combining-tree definitions for SRCU's benefit Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 25/40] srcu: Move rcu_init_levelspread() to rcu_tree_node.h Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 26/40] rcu: Remove redundant levelcnt[] array from rcu_init_one() Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 27/40] srcu: Move rcu_node traversal macros to rcu.h Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 28/40] srcu: Make num_rcu_lvl[] array be external Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 29/40] srcu: Fix bogus try_check_zero() comment Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 30/40] srcu: Improve rcu_seq grace-period-counter abstraction Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 31/40] srcu: Allow a second bit in rcu_seq for SRCU state Paul E. McKenney
2017-04-19 16:58 ` Paul E. McKenney [this message]
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 33/40] srcu: Crude control of expedited grace periods Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 34/40] mm: Use static initialization for "srcu" Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 35/40] srcu: Create a tiny SRCU Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 36/40] srcutorture: Print Tiny SRCU reader statistics Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 37/40] srcu: Introduce CLASSIC_SRCU Kconfig option Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 38/40] srcu: Parallelize callback handling Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 39/40] srcu: Expedite srcu_schedule_cbs_snp() callback invocation Paul E. McKenney
2017-04-19 16:58 ` [PATCH v3 tip/core/rcu 40/40] rcu: Make non-preemptive schedule be Tasks RCU quiescent state Paul E. McKenney
2017-09-28 9:37 ` Sasha Levin
2017-09-28 12:30 ` Paul E. McKenney
2017-09-28 15:38 ` Levin, Alexander (Sasha Levin)
2017-09-28 16:05 ` Paul E. McKenney
2017-09-28 16:18 ` Peter Zijlstra
2017-09-28 16:30 ` Paul E. McKenney
2017-09-29 9:30 ` Boqun Feng
2017-09-29 10:01 ` Paolo Bonzini
2017-09-29 10:25 ` Boqun Feng
2017-09-29 10:34 ` Peter Zijlstra
2017-09-29 11:44 ` Paolo Bonzini
2017-09-29 16:38 ` Paul E. McKenney
2017-09-29 16:36 ` Paul E. McKenney
2017-09-28 16:08 ` Peter Zijlstra
2017-09-28 16:23 ` Levin, Alexander (Sasha Levin)
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