rcu self-detected stall messages on OMAP3, 4 boards
From: paul@pwsan.com (Paul Walmsley)
Date: 2012-09-21 19:00:01
Also in:
linux-omap, lkml
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
--- .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