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McKenney" 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" Subject: [PATCH tip/core/rcu 6/6] rcu: Reduce default RCU CPU stall warning timeout Date: Tue, 30 Oct 2012 09:27:55 -0700 Message-Id: <1351614475-22895-6-git-send-email-paulmck@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.8 In-Reply-To: <1351614475-22895-1-git-send-email-paulmck@linux.vnet.ibm.com> References: <20121030162728.GA22648@linux.vnet.ibm.com> <1351614475-22895-1-git-send-email-paulmck@linux.vnet.ibm.com> X-Content-Scanned: Fidelis XPS MAILER x-cbid: 12103016-9360-0000-0000-00000C36683F X-Gm-Message-State: ALoCoQmn3eFjc6PU0q+C8BCaTjVGqQfYzeK9A+U5paPbO+e7aTsjapnkxPS1a7CM9as0mppWaSiT From: "Paul E. McKenney" 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 --- 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