From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: linux-kernel@vger.kernel.org
Cc: mingo@elte.hu, laijs@cn.fujitsu.com, dipankar@in.ibm.com,
akpm@linux-foundation.org, mathieu.desnoyers@polymtl.ca,
josh@joshtriplett.org, dvhltc@us.ibm.com, niv@us.ibm.com,
tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org,
Valdis.Kletnieks@vt.edu, dhowells@redhat.com,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Subject: [PATCH tip/core/rcu 4/4] rcu: make RCU's CPU-stall detector be default
Date: Wed, 2 Dec 2009 12:10:16 -0800 [thread overview]
Message-ID: <12597846162906-git-send-email-> (raw)
In-Reply-To: <20091202200955.GA12950@linux.vnet.ibm.com>
From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
The RCU_CPU_STALL_DETECTOR costs almost nothing and has located some bugs
that might otherwise have been difficult to track down. Make it be default
for the TREE RCU implementations. (TINY_RCU does not support CPU-stall
detection, but then again it is a uniprocessor...)
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---
lib/Kconfig.debug | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 8911558..50e0e78 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -749,7 +749,7 @@ config RCU_TORTURE_TEST_RUNNABLE
config RCU_CPU_STALL_DETECTOR
bool "Check for stalled CPUs delaying RCU grace periods"
depends on TREE_RCU || TREE_PREEMPT_RCU
- default n
+ default y
help
This option causes RCU to printk information on which
CPUs are delaying the current grace period, but only when
--
1.5.2.5
next prev parent reply other threads:[~2009-12-02 20:10 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-02 20:09 [PATCH tip/core/rcu 0/4] rcu: preemptible expedited grace periods and cleanups Paul E. McKenney
2009-12-02 20:10 ` [PATCH tip/core/rcu 1/4] rcu: rename "quiet" functions Paul E. McKenney
2009-12-02 23:20 ` Josh Triplett
2009-12-03 13:22 ` [tip:core/rcu] rcu: Rename " tip-bot for Paul E. McKenney
2009-12-02 20:10 ` [PATCH tip/core/rcu 2/4] rcu: enable fourth level of TREE_RCU hierarchy Paul E. McKenney
2009-12-02 23:25 ` Josh Triplett
2009-12-03 0:20 ` Paul E. McKenney
2009-12-03 13:22 ` [tip:core/rcu] rcu: Enable " tip-bot for Paul E. McKenney
2009-12-02 20:10 ` [PATCH tip/core/rcu 3/4] rcu: add expedited grace-period support for preemptible RCU Paul E. McKenney
2009-12-03 9:26 ` Lai Jiangshan
2009-12-03 14:41 ` Paul E. McKenney
2009-12-03 13:22 ` [tip:core/rcu] rcu: Add " tip-bot for Paul E. McKenney
2009-12-02 20:10 ` Paul E. McKenney [this message]
2009-12-03 13:22 ` [tip:core/rcu] rcu: Make RCU's CPU-stall detector be default tip-bot for Paul E. McKenney
2009-12-03 8:53 ` [PATCH tip/core/rcu 0/4] rcu: preemptible expedited grace periods and cleanups Lai Jiangshan
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