linux-kernel - Re: rcu self-detected stall messages on OMAP3, 4 boards

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Message-ID: <alpine.DEB.2.00.1209211748320.8839@utopia.booyaka.com>
Date:	Fri, 21 Sep 2012 17:51:16 +0000 (UTC)
From:	Paul Walmsley <paul@...an.com>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
cc:	"Bruce, Becky" <bbruce@...com>,
	"Paul E. McKenney" <paul.mckenney@...aro.org>,
	"<linux-kernel@...r.kernel.org>" <linux-kernel@...r.kernel.org>,
	"<linux-omap@...r.kernel.org>" <linux-omap@...r.kernel.org>,
	"<linux-arm-kernel@...ts.infradead.org>" 
	<linux-arm-kernel@...ts.infradead.org>,
	"Hilman, Kevin" <khilman@...com>,
	"Shilimkar, Santosh" <santosh.shilimkar@...com>,
	"Hunter, Jon" <jon-hunter@...com>,
	"<snijsure@...d-net.com>" <snijsure@...d-net.com>
Subject: Re: rcu self-detected stall messages on OMAP3, 4 boards

On Fri, 21 Sep 2012, Paul Walmsley wrote:

> The config used was 'omap2plus_defconfig', and enabled CONFIG_CPU_IDLE 
> by hand. 

One other thing I forgot to mention - CONFIG_RCU_CPU_STALL_INFO was 
enabled by hand also.  Below is the diff between omap2plus_defconfig and 
the config that was used here.


- Paul

--- .config	2012-09-21 11:50:19.565972113 -0600
+++ .testconfig	2012-09-21 11:50:12.233946950 -0600
@@ -536,7 +536,9 @@
 # CPU Frequency scaling
 #
 # CONFIG_CPU_FREQ is not set
-# CONFIG_CPU_IDLE is not set
+CONFIG_CPU_IDLE=y
+CONFIG_CPU_IDLE_GOV_LADDER=y
+CONFIG_CPU_IDLE_GOV_MENU=y
 CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED=y
 
 #
@@ -2535,7 +2537,7 @@
 # CONFIG_BOOT_PRINTK_DELAY is not set
 # CONFIG_RCU_TORTURE_TEST is not set
 CONFIG_RCU_CPU_STALL_TIMEOUT=60
-# CONFIG_RCU_CPU_STALL_INFO is not set
+CONFIG_RCU_CPU_STALL_INFO=y
 # CONFIG_RCU_TRACE is not set
 # CONFIG_KPROBES_SANITY_TEST is not set
 # CONFIG_BACKTRACE_SELF_TEST is not set

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