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, joel@joelfernandes.org,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Subject: [PATCH tip/core/rcu 09/40] rcu: Move rcu_implicit_dynticks_qs() to ->gp_seq
Date: Mon, 25 Jun 2018 17:08:28 -0700 [thread overview]
Message-ID: <20180626000859.23572-9-paulmck@linux.vnet.ibm.com> (raw)
In-Reply-To: <20180626000841.GA15696@linux.vnet.ibm.com>
This commit makes rcu_implicit_dynticks_qs() use ->gp_seq, with the
exception of tracing, which will be converted later.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---
kernel/rcu/tree.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index eda23797a7f4..eef3ce54114f 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -1178,7 +1178,7 @@ static int rcu_implicit_dynticks_qs(struct rcu_data *rdp)
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) {
+ rcu_seq_current(&rdp->gp_seq) == rnp->gp_seq && !rdp->gpwrap) {
trace_rcu_fqs(rdp->rsp->name, rdp->gpnum, rdp->cpu, TPS("rqc"));
rcu_gpnum_ovf(rnp, rdp);
return 1;
--
2.17.1
next prev parent reply other threads:[~2018-06-26 0:07 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-26 0:08 [PATCH tip/core/rcu 0/40] RCU ->gp_seq conversion for v4.19 Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 01/40] rcu: Introduce grace-period sequence numbers Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 02/40] rcu: Move rcu_gp_slow() to ->gp_seq Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 03/40] rcu: Make rcutorture's batches-completed API use ->gp_seq Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 04/40] rcu: Convert rcu_check_gp_kthread_starvation() to GP sequence number Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 05/40] rcu: Make quiescent-state reporting use ->gp_seq Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 06/40] rcu: Convert conditional grace-period primitives to ->gp_seq Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 07/40] rcu: Move RCU's grace-period-change code " Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 08/40] rcu: Convert rcu_gpnum_ovf() " Paul E. McKenney
2018-06-26 0:08 ` Paul E. McKenney [this message]
2018-06-26 0:08 ` [PATCH tip/core/rcu 10/40] rcu: Move rcu_try_advance_all_cbs() " Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 11/40] rcu: Move rcu_nocb_gp_get() " Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 12/40] rcu: Move rcu_gp_in_progress() " Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 13/40] rcu: Convert ->rcu_iw_gpnum " Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 14/40] rcu: Convert ->completedqs " Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 15/40] rcu: Convert grace-period requests " Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 16/40] rcu: Make RCU CPU stall warnings use ->gp_seq Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 17/40] rcutorture: Convert rcutorture_get_gp_data() to ->gp_seq Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 18/40] rcu: Move from ->need_future_gp[] to ->gp_seq_needed Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 19/40] rcu: Make rcu_nocb_wait_gp() check if GP already requested Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 20/40] rcu: Convert rcu_grace_period tracepoint to gp_seq Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 21/40] rcu: Convert rcu_future_grace_period " Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 22/40] rcu: Convert rcu_grace_period_init " Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 23/40] rcu: Convert rcu_preempt_task tracepoint to ->gp_seq Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 24/40] rcu: Convert rcu_unlock_preempted_task " Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 25/40] rcu: Convert rcu_quiescent_state_report " Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 26/40] rcu: Convert rcu_fqs " Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 27/40] rcu: Remove ->gpnum and ->completed Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 28/40] rcu: Make simple callback acceleration refer to rdp->gp_seq_needed Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 29/40] doc: Update data-structure documentation for ->gp_seq Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 30/40] doc: Update memory-ordering documentation for ->gp-seq Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 31/40] doc: Update RCU CPU stall-warning documentation Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 32/40] rcu: Don't funnel-lock above leaf node if GP in progress Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 33/40] rcu: Produce last "CleanupMore" trace only if late-breaking request Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 34/40] rcu: Fix cpustart tracepoint gp_seq number Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 35/40] rcu: Make rcu_start_this_gp() check for grace period already started Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 36/40] rcutorture: Correctly handle grace-period sequence wrap Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 37/40] rcu: Regularize resetting of rcu_data wrap indicator Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 38/40] rcu: Rename the grace-period-request variables and parameters Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 39/40] rcu: Use better variable names in funnel locking loop Paul E. McKenney
2018-06-26 0:08 ` [PATCH tip/core/rcu 40/40] rcu: Identify grace period is in progress as we advance up the tree Paul E. McKenney
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