rcu self-detected stall messages on OMAP3, 4 boards

Commit Message

Paul Walmsley Sept. 21, 2012, 6:59 p.m. UTC

Hi

Just did a test with CONFIG_NO_HZ=n, and no rcu_sched stall messages 
appeared for 60 minutes.

Following is the diff from omap2plus_defconfig.

- Paul

Patch

--- .config	2012-09-21 12:51:19.114938954 -0600
+++ .testconfig	2012-09-21 12:51:15.686926318 -0600
@@ -69,7 +69,7 @@ 
 # Timers subsystem
 #
 CONFIG_TICK_ONESHOT=y
-CONFIG_NO_HZ=y
+# CONFIG_NO_HZ is not set
 CONFIG_HIGH_RES_TIMERS=y
 
 #
@@ -80,7 +80,6 @@ 
 CONFIG_RCU_FANOUT=32
 CONFIG_RCU_FANOUT_LEAF=16
 # CONFIG_RCU_FANOUT_EXACT is not set
-# CONFIG_RCU_FAST_NO_HZ is not set
 # CONFIG_TREE_RCU_TRACE is not set
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
@@ -2535,7 +2534,7 @@ 
 # 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