irqbalance: add banned_cpulist option

Configure CPUs to ignore with `IRQBALANCE_BANNED_CPULIST` environment variable

Signed-off-by: Hentioe Cl <meow.i5.br@gmail.com>
[added PKG_RELEASE bump]

utils/irqbalance/Makefile

@@ -6,7 +6,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=irqbalance
 PKG_VERSION:=1.9.2
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://github.com/Irqbalance/irqbalance.git

utils/irqbalance/files/irqbalance.config

@@ -8,6 +8,9 @@ config irqbalance 'irqbalance'
 	# The default value is 10 seconds
 	#option interval '10'
 
+	# Specify excluded cpulist
+	#option banned_cpulist '0'
+
 	# List of IRQ's to ignore
 	#list banirq '36'
 	#list banirq '69'

utils/irqbalance/files/irqbalance.init

@@ -22,6 +22,9 @@ start_service() {
 	# 10 is the default
 	config_get interval irqbalance interval 10
 
+	# empty is the default
+	config_get banned_cpulist irqbalance banned_cpulist ''
+
 	# A list of IRQ's to ignore
 	banirq=""
 	handle_banirq_value()
@@ -31,6 +34,9 @@ start_service() {
 	config_list_foreach irqbalance banirq handle_banirq_value
 
 	procd_open_instance "irqbalance"
+	if [ -n "$banned_cpulist" ]; then
+		procd_set_param env IRQBALANCE_BANNED_CPULIST="$banned_cpulist"
+	fi
 	procd_set_param command /usr/sbin/irqbalance -f -c "$deepestcache" -t "$interval" "$banirq"
 	procd_set_param respawn
 	procd_close_instance