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 v2 tip/core/rcu 11/39] rcu: Place guard on rcu_all_qs() and rcu_note_context_switch() actions
Date: Mon, 17 Apr 2017 16:44:58 -0700 [thread overview]
Message-ID: <1492472726-3841-11-git-send-email-paulmck@linux.vnet.ibm.com> (raw)
In-Reply-To: <20170417234452.GB19013@linux.vnet.ibm.com>
The rcu_all_qs() and rcu_note_context_switch() do a series of checks,
taking various actions to supply RCU with quiescent states, depending
on the outcomes of the various checks. This is a bit much for scheduling
fastpaths, so this commit creates a separate ->rcu_urgent_qs field in
the rcu_dynticks structure that acts as a global guard for these checks.
Thus, in the common case, rcu_all_qs() and rcu_note_context_switch()
check the ->rcu_urgent_qs field, find it false, and simply return.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
---
.../Design/Data-Structures/Data-Structures.html | 11 ++++++-
kernel/rcu/tree.c | 38 ++++++++++++++--------
kernel/rcu/tree.h | 3 +-
kernel/rcu/tree_exp.h | 2 ++
kernel/rcu/tree_plugin.h | 8 +++--
5 files changed, 44 insertions(+), 18 deletions(-)
diff --git a/Documentation/RCU/Design/Data-Structures/Data-Structures.html b/Documentation/RCU/Design/Data-Structures/Data-Structures.html
index e4bf20a68fa3..4dec89097559 100644
--- a/Documentation/RCU/Design/Data-Structures/Data-Structures.html
+++ b/Documentation/RCU/Design/Data-Structures/Data-Structures.html
@@ -1106,6 +1106,7 @@ Its fields are as follows:
3 atomic_t dynticks;
4 bool rcu_need_heavy_qs;
5 unsigned long rcu_qs_ctr;
+ 6 bool rcu_urgent_qs;
</pre>
<p>The <tt>->dynticks_nesting</tt> field counts the
@@ -1131,12 +1132,20 @@ it is willing to call for heavy-weight dyntick-counter operations.
This flag is checked by RCU's context-switch and <tt>cond_resched()</tt>
code, which provide a momentary idle sojourn in response.
-</p><p>Finally the <tt>->rcu_qs_ctr</tt> field is used to record
+</p><p>The <tt>->rcu_qs_ctr</tt> field is used to record
quiescent states from <tt>cond_resched()</tt>.
Because <tt>cond_resched()</tt> can execute quite frequently, this
must be quite lightweight, as in a non-atomic increment of this
per-CPU field.
+</p><p>Finally, the <tt>->rcu_urgent_qs</tt> field is used to record
+the fact that the RCU core code would really like to see a quiescent
+state from the corresponding CPU, with the various other fields indicating
+just how badly RCU wants this quiescent state.
+This flag is checked by RCU's context-switch and <tt>cond_resched()</tt>
+code, which, if nothing else, non-atomically increment <tt>->rcu_qs_ctr</tt>
+in response.
+
<table>
<tr><th> </th></tr>
<tr><th align="left">Quick Quiz:</th></tr>
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 3c62ea06edb3..aa81cc6c365e 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -464,8 +464,14 @@ void rcu_note_context_switch(void)
trace_rcu_utilization(TPS("Start context switch"));
rcu_sched_qs();
rcu_preempt_note_context_switch();
+ /* Load rcu_urgent_qs before other flags. */
+ if (!smp_load_acquire(this_cpu_ptr(&rcu_dynticks.rcu_urgent_qs)))
+ goto out;
+ this_cpu_write(rcu_dynticks.rcu_urgent_qs, false);
if (unlikely(raw_cpu_read(rcu_dynticks.rcu_need_heavy_qs)))
rcu_momentary_dyntick_idle();
+ this_cpu_inc(rcu_dynticks.rcu_qs_ctr);
+out:
trace_rcu_utilization(TPS("End context switch"));
barrier(); /* Avoid RCU read-side critical sections leaking up. */
}
@@ -488,29 +494,26 @@ void rcu_all_qs(void)
{
unsigned long flags;
+ if (!raw_cpu_read(rcu_dynticks.rcu_urgent_qs))
+ return;
+ preempt_disable();
+ /* Load rcu_urgent_qs before other flags. */
+ if (!smp_load_acquire(this_cpu_ptr(&rcu_dynticks.rcu_urgent_qs))) {
+ preempt_enable();
+ return;
+ }
+ this_cpu_write(rcu_dynticks.rcu_urgent_qs, false);
barrier(); /* Avoid RCU read-side critical sections leaking down. */
if (unlikely(raw_cpu_read(rcu_dynticks.rcu_need_heavy_qs))) {
local_irq_save(flags);
rcu_momentary_dyntick_idle();
local_irq_restore(flags);
}
- if (unlikely(raw_cpu_read(rcu_sched_data.cpu_no_qs.b.exp))) {
- /*
- * Yes, we just checked a per-CPU variable with preemption
- * enabled, so we might be migrated to some other CPU at
- * this point. That is OK because in that case, the
- * migration will supply the needed quiescent state.
- * We might end up needlessly disabling preemption and
- * invoking rcu_sched_qs() on the destination CPU, but
- * the probability and cost are both quite low, so this
- * should not be a problem in practice.
- */
- preempt_disable();
+ if (unlikely(raw_cpu_read(rcu_sched_data.cpu_no_qs.b.exp)))
rcu_sched_qs();
- preempt_enable();
- }
this_cpu_inc(rcu_dynticks.rcu_qs_ctr);
barrier(); /* Avoid RCU read-side critical sections leaking up. */
+ preempt_enable();
}
EXPORT_SYMBOL_GPL(rcu_all_qs);
@@ -1246,6 +1249,7 @@ static int rcu_implicit_dynticks_qs(struct rcu_data *rdp,
{
unsigned long jtsq;
bool *rnhqp;
+ bool *ruqp;
unsigned long rjtsc;
struct rcu_node *rnp;
@@ -1281,11 +1285,15 @@ static int rcu_implicit_dynticks_qs(struct rcu_data *rdp,
* might not be the case for nohz_full CPUs looping in the kernel.
*/
rnp = rdp->mynode;
+ ruqp = per_cpu_ptr(&rcu_dynticks.rcu_urgent_qs, rdp->cpu);
if (time_after(jiffies, rdp->rsp->gp_start + jtsq) &&
READ_ONCE(rdp->rcu_qs_ctr_snap) != per_cpu(rcu_dynticks.rcu_qs_ctr, rdp->cpu) &&
READ_ONCE(rdp->gpnum) == rnp->gpnum && !rdp->gpwrap) {
trace_rcu_fqs(rdp->rsp->name, rdp->gpnum, rdp->cpu, TPS("rqc"));
return 1;
+ } else {
+ /* Load rcu_qs_ctr before store to rcu_urgent_qs. */
+ smp_store_release(ruqp, true);
}
/* Check for the CPU being offline. */
@@ -1321,6 +1329,8 @@ static int rcu_implicit_dynticks_qs(struct rcu_data *rdp,
(time_after(jiffies, rdp->rsp->gp_start + jtsq) ||
time_after(jiffies, rdp->rsp->jiffies_resched))) {
WRITE_ONCE(*rnhqp, true);
+ /* Store rcu_need_heavy_qs before rcu_urgent_qs. */
+ smp_store_release(ruqp, true);
rdp->rsp->jiffies_resched += 5; /* Re-enable beating. */
}
diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index b212cd0f22c7..d2f276fc2edc 100644
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -113,8 +113,9 @@ struct rcu_dynticks {
/* Process level is worth LLONG_MAX/2. */
int dynticks_nmi_nesting; /* Track NMI nesting level. */
atomic_t dynticks; /* Even value for idle, else odd. */
- bool rcu_need_heavy_qs; /* GP old, need heavy quiescent state. */
+ bool rcu_need_heavy_qs; /* GP old, need heavy quiescent state. */
unsigned long rcu_qs_ctr; /* Light universal quiescent state ctr. */
+ bool rcu_urgent_qs; /* GP old need light quiescent state. */
#ifdef CONFIG_NO_HZ_FULL_SYSIDLE
long long dynticks_idle_nesting;
/* irq/process nesting level from idle. */
diff --git a/kernel/rcu/tree_exp.h b/kernel/rcu/tree_exp.h
index a7b639ccd46e..a1f52bbe9db6 100644
--- a/kernel/rcu/tree_exp.h
+++ b/kernel/rcu/tree_exp.h
@@ -331,6 +331,8 @@ static void sync_sched_exp_handler(void *data)
return;
}
__this_cpu_write(rcu_sched_data.cpu_no_qs.b.exp, true);
+ /* Store .exp before .rcu_urgent_qs. */
+ smp_store_release(this_cpu_ptr(&rcu_dynticks.rcu_urgent_qs), true);
resched_cpu(smp_processor_id());
}
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index 0a62a8f1caac..621296a6694b 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -1860,7 +1860,9 @@ static void __call_rcu_nocb_enqueue(struct rcu_data *rdp,
trace_rcu_nocb_wake(rdp->rsp->name, rdp->cpu,
TPS("WakeEmpty"));
} else {
- rdp->nocb_defer_wakeup = RCU_NOGP_WAKE;
+ WRITE_ONCE(rdp->nocb_defer_wakeup, RCU_NOGP_WAKE);
+ /* Store ->nocb_defer_wakeup before ->rcu_urgent_qs. */
+ smp_store_release(this_cpu_ptr(&rcu_dynticks.rcu_urgent_qs), true);
trace_rcu_nocb_wake(rdp->rsp->name, rdp->cpu,
TPS("WakeEmptyIsDeferred"));
}
@@ -1872,7 +1874,9 @@ static void __call_rcu_nocb_enqueue(struct rcu_data *rdp,
trace_rcu_nocb_wake(rdp->rsp->name, rdp->cpu,
TPS("WakeOvf"));
} else {
- rdp->nocb_defer_wakeup = RCU_NOGP_WAKE_FORCE;
+ WRITE_ONCE(rdp->nocb_defer_wakeup, RCU_NOGP_WAKE_FORCE);
+ /* Store ->nocb_defer_wakeup before ->rcu_urgent_qs. */
+ smp_store_release(this_cpu_ptr(&rcu_dynticks.rcu_urgent_qs), true);
trace_rcu_nocb_wake(rdp->rsp->name, rdp->cpu,
TPS("WakeOvfIsDeferred"));
}
--
2.5.2
next prev parent reply other threads:[~2017-04-17 23:53 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 ` Paul E. McKenney [this message]
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 ` [PATCH v3 tip/core/rcu 32/40] srcu: Merge ->srcu_state into ->srcu_gp_seq Paul E. McKenney
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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