linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
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,
	Dmitry Vyukov <dvyukov@google.com>,
	syzkaller@googlegroups.com,
	"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Subject: [PATCH tip/core/rcu 22/40] rcu: Fix warning in rcu_seq_end()
Date: Wed, 12 Apr 2017 10:40:07 -0700	[thread overview]
Message-ID: <1492018825-25634-22-git-send-email-paulmck@linux.vnet.ibm.com> (raw)
In-Reply-To: <20170412174003.GA23207@linux.vnet.ibm.com>

From: Dmitry Vyukov <dvyukov@google.com>

The rcu_seq_end() function increments seq signifying completion
of a grace period, after that checks that the seq is even and wakes
_synchronize_rcu_expedited().  The _synchronize_rcu_expedited() function
uses wait_event() to wait for even seq.  The problem is that wait_event()
can return as soon as seq becomes even without waiting for the wakeup.
In such case the warning in rcu_seq_end() can falsely fire if the next
expedited grace period starts before the check.

Check that seq has good value before incrementing it.

Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Cc: syzkaller@googlegroups.com
Cc: linux-kernel@vger.kernel.org
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: josh@joshtriplett.org
Cc: jiangshanlai@gmail.com
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

---

syzkaller-triggered warning:

WARNING: CPU: 0 PID: 4832 at kernel/rcu/tree.c:3533
rcu_seq_end+0x110/0x140 kernel/rcu/tree.c:3533
CPU: 0 PID: 4832 Comm: kworker/0:3 Not tainted 4.10.0+ #276
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Workqueue: events wait_rcu_exp_gp
Call Trace:
 __dump_stack lib/dump_stack.c:15 [inline]
 dump_stack+0x2ee/0x3ef lib/dump_stack.c:51
 panic+0x1fb/0x412 kernel/panic.c:179
 __warn+0x1c4/0x1e0 kernel/panic.c:540
 warn_slowpath_null+0x2c/0x40 kernel/panic.c:583
 rcu_seq_end+0x110/0x140 kernel/rcu/tree.c:3533
 rcu_exp_gp_seq_end kernel/rcu/tree_exp.h:36 [inline]
 rcu_exp_wait_wake+0x8a9/0x1330 kernel/rcu/tree_exp.h:517
 rcu_exp_sel_wait_wake kernel/rcu/tree_exp.h:559 [inline]
 wait_rcu_exp_gp+0x83/0xc0 kernel/rcu/tree_exp.h:570
 process_one_work+0xc06/0x1c20 kernel/workqueue.c:2096
 worker_thread+0x223/0x19c0 kernel/workqueue.c:2230
 kthread+0x326/0x3f0 kernel/kthread.c:227
 ret_from_fork+0x31/0x40 arch/x86/entry/entry_64.S:430
---
---
 kernel/rcu/rcu.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/rcu/rcu.h b/kernel/rcu/rcu.h
index 91e0bf31f6ce..0bc1313c49e2 100644
--- a/kernel/rcu/rcu.h
+++ b/kernel/rcu/rcu.h
@@ -73,8 +73,8 @@ static inline void rcu_seq_start(unsigned long *sp)
 static inline void rcu_seq_end(unsigned long *sp)
 {
 	smp_mb(); /* Ensure update-side operation before counter increment. */
+	WARN_ON_ONCE(!(*sp & 0x1));
 	WRITE_ONCE(*sp, *sp + 1);
-	WARN_ON_ONCE(*sp & 0x1);
 }
 
 /* Take a snapshot of the update side's sequence number. */
-- 
2.5.2

  parent reply	other threads:[~2017-04-12 17:42 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 ` Paul E. McKenney [this message]
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     ` [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)

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1492018825-25634-22-git-send-email-paulmck@linux.vnet.ibm.com \
    --to=paulmck@linux.vnet.ibm.com \
    --cc=akpm@linux-foundation.org \
    --cc=bobby.prani@gmail.com \
    --cc=dhowells@redhat.com \
    --cc=dipankar@in.ibm.com \
    --cc=dvyukov@google.com \
    --cc=edumazet@google.com \
    --cc=fweisbec@gmail.com \
    --cc=jiangshanlai@gmail.com \
    --cc=josh@joshtriplett.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mathieu.desnoyers@efficios.com \
    --cc=mingo@kernel.org \
    --cc=oleg@redhat.com \
    --cc=peterz@infradead.org \
    --cc=rostedt@goodmis.org \
    --cc=syzkaller@googlegroups.com \
    --cc=tglx@linutronix.de \
    --subject='Re: [PATCH tip/core/rcu 22/40] rcu: Fix warning in rcu_seq_end()' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).