tweak RCU

Author: simonchen

trunk/configs/boards/NEWIFI/kernel-4.4.x.config

@@ -260,14 +260,15 @@ CONFIG_TICK_CPU_ACCOUNTING=y
 #
 CONFIG_TREE_RCU=y
 CONFIG_RCU_EXPERT=y
-# CONFIG_RCU_BOOST is not set
-# CONFIG_SRCU is not set
+CONFIG_PREEMPT_RCU=Y
+CONFIG_RCU_BOOST=y
+CONFIG_SRCU=y
 # CONFIG_TASKS_RCU is not set
 CONFIG_RCU_STALL_COMMON=y
-CONFIG_RCU_FANOUT=16
-CONFIG_RCU_FANOUT_LEAF=8
+CONFIG_RCU_FANOUT=32
+CONFIG_RCU_FANOUT_LEAF=16
 # CONFIG_TREE_RCU_TRACE is not set
-CONFIG_RCU_KTHREAD_PRIO=1
+CONFIG_RCU_KTHREAD_PRIO=6
 # CONFIG_RCU_NOCB_CPU is not set
 # CONFIG_RCU_EXPEDITE_BOOT is not set
 CONFIG_BUILD_BIN2C=y