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| author |   Lai Jiangshan <jiangshanlai@gmail.com> | 2019-10-15 10:23:57 +0000 |
|---|---|---|
| committer |   Paul E. McKenney <paulmck@kernel.org> | 2020-01-24 10:33:31 -0800 |
| commit | 2488a5e695564897a0f8ea42cd3af71647cd26d2 (patch) | |
| tree | db67d218e4439daf2a3296577fb6266f15f5601a /kernel/rcu | |
| parent | rcu: Fix harmless omission of "CONFIG_" from #if condition (diff) | |
| download | linux-dev-2488a5e695564897a0f8ea42cd3af71647cd26d2.tar.xz linux-dev-2488a5e695564897a0f8ea42cd3af71647cd26d2.zip | |
rcu: Fix tracepoint tracking RCU CPU kthread utilization
In the call to trace_rcu_utilization() at the start of the loop in
rcu_cpu_kthread(), "rcu_wait" is incorrect, plus this trace event needs
to be hoisted above the loop to balance with either the "rcu_wait" or
"rcu_yield", depending on how the loop exits. This commit therefore
makes these changes.
Signed-off-by: Lai Jiangshan <jiangshanlai@gmail.com>
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/tree.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index dd8cfc34f4da..ba154a3080fb 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -2474,8 +2474,8 @@ static void rcu_cpu_kthread(unsigned int cpu) char work, *workp = this_cpu_ptr(&rcu_data.rcu_cpu_has_work); int spincnt; + trace_rcu_utilization(TPS("Start CPU kthread@rcu_run")); for (spincnt = 0; spincnt < 10; spincnt++) { - trace_rcu_utilization(TPS("Start CPU kthread@rcu_wait")); local_bh_disable(); *statusp = RCU_KTHREAD_RUNNING; local_irq_disable(); |