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, niv@us.ibm.com, tglx@linutronix.de,
peterz@infradead.org, rostedt@goodmis.org,
Valdis.Kletnieks@vt.edu, dhowells@redhat.com,
edumazet@google.com, darren@dvhart.com, fweisbec@gmail.com,
sbw@mit.edu, patches@linaro.org,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Subject: [PATCH tip/core/rcu 6/6] rcu: Reduce default RCU CPU stall warning timeout
Date: Tue, 30 Oct 2012 09:27:55 -0700 [thread overview]
Message-ID: <1351614475-22895-6-git-send-email-paulmck@linux.vnet.ibm.com> (raw)
In-Reply-To: <1351614475-22895-1-git-send-email-paulmck@linux.vnet.ibm.com>
From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
The RCU CPU stall warning timeout has defaulted to 60 seconds for
some years, with almost no false positives. This commit therefore
reduces the default to 21 seconds, slightly shorter than the new
soft-lockup timeout.
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 28e9d6c9..41faf0b 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -972,7 +972,7 @@ config RCU_CPU_STALL_TIMEOUT
int "RCU CPU stall timeout in seconds"
depends on TREE_RCU || TREE_PREEMPT_RCU
range 3 300
- default 60
+ default 21
help
If a given RCU grace period extends more than the specified
number of seconds, a CPU stall warning is printed. If the
--
1.7.8
prev parent reply other threads:[~2012-10-30 16:40 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-30 16:27 [PATCH tip/core/rcu 0/6] Fixes for 3.8 Paul E. McKenney
2012-10-30 16:27 ` [PATCH tip/core/rcu 1/6] rcu: Accelerate callbacks for CPU initiating a grace period Paul E. McKenney
2012-10-30 16:27 ` [PATCH tip/core/rcu 2/6] rcu: Fix batch-limit size problem Paul E. McKenney
2012-10-30 16:27 ` [PATCH tip/core/rcu 3/6] rcu: Remove list_for_each_continue_rcu() Paul E. McKenney
2012-10-30 16:27 ` [PATCH tip/core/rcu 4/6] rcu: Add new rcutorture module parameters to start/end test messages Paul E. McKenney
2012-10-30 16:27 ` [PATCH tip/core/rcu 5/6] rcu: Clarify memory-ordering properties of grace-period primitives Paul E. McKenney
2012-10-30 16:27 ` Paul E. McKenney [this message]
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