From: "Paul E. McKenney" <paulmck@linux.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.ibm.com>,
Tejun Heo <tj@kernel.org>, Jens Axboe <axboe@kernel.dk>,
Dennis Zhou <dennis@kernel.org>,
Johannes Weiner <hannes@cmpxchg.org>,
"Dennis Zhou (Facebook)" <dennisszhou@gmail.com>
Subject: [PATCH tip/core/rcu 36/41] cgroups: Replace synchronize_sched() with synchronize_rcu()
Date: Sun, 11 Nov 2018 11:44:05 -0800 [thread overview]
Message-ID: <20181111194410.6368-36-paulmck@linux.ibm.com> (raw)
In-Reply-To: <20181111194104.GA4787@linux.ibm.com>
Now that synchronize_rcu() waits for preempt-disable regions of code
as well as RCU read-side critical sections, synchronize_sched() can be
replaced by synchronize_rcu(). This commit therefore makes this change,
even though it is but a comment.
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: "Dennis Zhou (Facebook)" <dennisszhou@gmail.com>
---
kernel/cgroup/cgroup.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index 6aaf5dd5383b..7a8429f8e280 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -5343,7 +5343,7 @@ int __init cgroup_init(void)
cgroup_rstat_boot();
/*
- * The latency of the synchronize_sched() is too high for cgroups,
+ * The latency of the synchronize_rcu() is too high for cgroups,
* avoid it at the cost of forcing all readers into the slow path.
*/
rcu_sync_enter_start(&cgroup_threadgroup_rwsem.rss);
--
2.17.1
next prev parent reply other threads:[~2018-11-11 19:44 UTC|newest]
Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-11 19:41 [PATCH tip/core/rcu 0/41] More RCU flavor consolidation cleanup for v4.21/v5.0 Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 01/41] rcu: Remove unused rcu_state externs Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 02/41] rcu: Fix rcu_{node,data} comments about gp_seq_needed Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 03/41] rcu: Eliminate synchronize_rcu_mult() Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 04/41] rcu: Consolidate the RCU update functions invoked by sync.c Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 05/41] sched/membarrier: Replace synchronize_sched() with synchronize_rcu() Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 06/41] sparc/oprofile: Convert timer_stop() to use synchronize_rcu() Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 07/41] s390/mm: Convert tlb_table_flush() to use call_rcu() Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 08/41] powerpc: Convert hugepd_free() " Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 09/41] crypto/pcrypt: Replace synchronize_rcu_bh() with synchronize_rcu() Paul E. McKenney
2018-11-16 5:56 ` Herbert Xu
2018-11-27 17:19 ` Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 10/41] drivers/ipmi: Replace synchronize_sched() " Paul E. McKenney
2018-11-12 15:38 ` Corey Minyard
2018-11-12 16:04 ` Paul E. McKenney
2018-11-12 16:15 ` Corey Minyard
2018-11-12 16:28 ` Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 11/41] ethernet/sis: " Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 12/41] ethernet/realtek: " Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 13/41] ethernet/intel/ixgbe: " Paul E. McKenney
2018-11-13 16:54 ` [Intel-wired-lan] " Bowers, AndrewX
2018-11-11 19:43 ` [PATCH tip/core/rcu 14/41] drivers/vhost: Replace synchronize_rcu_bh() " Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 15/41] cpufreq/intel_pstate: Replace synchronize_sched() " Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 16/41] cpufreq/cpufreq_governor: " Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 17/41] fs/file: " Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 18/41] tracing: Replace synchronize_sched() and call_rcu_sched() Paul E. McKenney
2018-11-12 2:09 ` Steven Rostedt
2018-11-11 19:43 ` [PATCH tip/core/rcu 19/41] main: Replace rcu_barrier_sched() with rcu_barrier() Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 20/41] kprobes: eplace synchronize_sched() with synchronize_rcu() Paul E. McKenney
2018-11-12 3:00 ` Masami Hiramatsu
2018-11-12 3:19 ` Paul E. McKenney
2018-11-13 18:08 ` Masami Hiramatsu
2018-11-13 19:22 ` Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 21/41] lockdep: Replace " Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 22/41] sched/membarrier: " Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 23/41] sched: Replace " Paul E. McKenney
2018-11-12 0:12 ` Peter Zijlstra
2018-11-12 0:45 ` Paul E. McKenney
2018-11-12 0:53 ` Peter Zijlstra
2018-11-12 1:47 ` Paul E. McKenney
2018-11-12 2:07 ` Peter Zijlstra
2018-11-12 2:24 ` Paul E. McKenney
2018-11-12 9:00 ` Peter Zijlstra
2018-11-12 13:28 ` Paul E. McKenney
2018-11-12 18:17 ` Peter Zijlstra
2018-11-12 20:20 ` Steven Rostedt
2018-11-12 22:21 ` Paul E. McKenney
2018-11-26 19:59 ` Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 24/41] modules: Replace synchronize_sched() and call_rcu_sched() Paul E. McKenney
2018-11-12 12:48 ` Jessica Yu
2018-11-12 16:31 ` Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 25/41] workqueue: Replace call_rcu_sched() with call_rcu() Paul E. McKenney
2018-11-13 15:48 ` Tejun Heo
2018-11-13 19:21 ` Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 26/41] events: Replace synchronize_sched() with synchronize_rcu() Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 27/41] percpu-refcount: Replace call_rcu_sched() with call_rcu() Paul E. McKenney
2018-11-13 15:48 ` Tejun Heo
2018-11-11 19:43 ` [PATCH tip/core/rcu 28/41] slab: Replace synchronize_sched() with synchronize_rcu() Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 29/41] mm: Replace call_rcu_sched() with call_rcu() Paul E. McKenney
2018-11-11 19:43 ` [PATCH tip/core/rcu 30/41] netfilter: Replace call_rcu_bh(), rcu_barrier_bh(), and synchronize_rcu_bh() Paul E. McKenney
2018-12-01 11:35 ` Pablo Neira Ayuso
2018-11-11 19:44 ` [PATCH tip/core/rcu 31/41] net/sched: Replace call_rcu_bh() and rcu_barrier_bh() Paul E. McKenney
2018-11-11 19:44 ` [PATCH tip/core/rcu 32/41] net/core: Replace call_rcu_bh() and synchronize_rcu_bh() Paul E. McKenney
2018-11-11 19:44 ` [PATCH tip/core/rcu 33/41] net/bridge: Replace call_rcu_bh() and rcu_barrier_bh() Paul E. McKenney
2018-11-13 0:29 ` Nikolay Aleksandrov
2018-11-11 19:44 ` [PATCH tip/core/rcu 34/41] percpu-rwsem: Replace synchronize_sched() with synchronize_rcu() Paul E. McKenney
2018-11-13 15:49 ` Tejun Heo
2018-11-11 19:44 ` [PATCH tip/core/rcu 35/41] types: Remove call_rcu_bh() and call_rcu_sched() Paul E. McKenney
2018-11-11 19:44 ` Paul E. McKenney [this message]
2018-11-13 15:50 ` [PATCH tip/core/rcu 36/41] cgroups: Replace synchronize_sched() with synchronize_rcu() Tejun Heo
2018-11-11 19:44 ` [PATCH tip/core/rcu 37/41] livepatch: " Paul E. McKenney
2018-11-11 19:44 ` [PATCH tip/core/rcu 38/41] net/core/skmsg: Replace call_rcu_sched() with call_rcu() Paul E. McKenney
2018-11-11 19:44 ` [PATCH tip/core/rcu 39/41] net/decnet: Replace rcu_barrier_bh() with rcu_barrier() Paul E. McKenney
2018-11-11 19:44 ` [PATCH tip/core/rcu 40/41] tools/kernel.h: Replace synchronize_sched() with synchronize_rcu() Paul E. McKenney
2018-11-11 19:44 ` [PATCH tip/core/rcu 41/41] rcutorture/formal: " Paul E. McKenney
2018-11-12 14:07 ` [PATCH tip/core/rcu 0/41] More RCU flavor consolidation cleanup for v4.21/v5.0 Mathieu Desnoyers
2018-11-12 16:01 ` Paul E. McKenney
2018-11-12 21:40 ` Sasha Levin
2018-11-12 22:16 ` Paul E. McKenney
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