tuned/SOURCES/tuned-2.21.0-sd-load-balance.patch

diff --git a/profiles/cpu-partitioning/script.sh b/profiles/cpu-partitioning/script.sh
index ec422ca..cb378b7 100755
--- a/profiles/cpu-partitioning/script.sh
+++ b/profiles/cpu-partitioning/script.sh
@@ -2,6 +2,38 @@
 
 . /usr/lib/tuned/functions
 
+no_balance_cpus_file=$STORAGE/no-balance-cpus.txt
+
+change_sd_balance_bit()
+{
+    local set_bit=$1
+    local flags_cur=
+    local file=
+    local cpu=
+
+    for cpu in $(cat $no_balance_cpus_file); do
+        for file in $(find /proc/sys/kernel/sched_domain/cpu$cpu -name flags -print); do
+            flags_cur=$(cat $file)
+            if [ $set_bit -eq 1 ]; then
+                flags_cur=$((flags_cur | 0x1))
+            else
+                flags_cur=$((flags_cur & 0xfffe))
+            fi
+            echo $flags_cur > $file
+        done
+    done
+}
+
+disable_balance_domains()
+{
+    change_sd_balance_bit 0
+}
+
+enable_balance_domains()
+{
+    change_sd_balance_bit 1
+}
+
 start() {
     mkdir -p "${TUNED_tmpdir}/etc/systemd"
     mkdir -p "${TUNED_tmpdir}/usr/lib/dracut/hooks/pre-udev"
@@ -9,6 +41,9 @@ start() {
     cp 00-tuned-pre-udev.sh "${TUNED_tmpdir}/usr/lib/dracut/hooks/pre-udev/"
     setup_kvm_mod_low_latency
     disable_ksm
+
+    echo "$TUNED_no_balance_cores_expanded" | sed 's/,/ /g' > $no_balance_cpus_file
+    disable_balance_domains
     return "$?"
 }
 
@@ -18,6 +53,7 @@ stop() {
         teardown_kvm_mod_low_latency
         enable_ksm
     fi
+    enable_balance_domains
     return "$?"
 }
 
diff --git a/profiles/cpu-partitioning/tuned.conf b/profiles/cpu-partitioning/tuned.conf
index 11f03cf..a682c9c 100644
--- a/profiles/cpu-partitioning/tuned.conf
+++ b/profiles/cpu-partitioning/tuned.conf
@@ -35,8 +35,6 @@ no_balance_cores_expanded=${f:cpulist_unpack:${no_balance_cores}}
 # Fail if isolated_cores contains CPUs which are not online
 assert2=${f:assertion:isolated_cores contains online CPU(s):${isolated_cores_expanded}:${isolated_cores_online_expanded}}
 
-cmd_isolcpus=${f:regex_search_ternary:${no_balance_cores}:\s*[0-9]: isolcpus=${no_balance_cores}:}
-
 [sysfs]
 /sys/bus/workqueue/devices/writeback/cpumask = ${not_isolated_cpumask}
 /sys/devices/virtual/workqueue/cpumask = ${not_isolated_cpumask}
@@ -62,4 +60,4 @@ priority=10
 initrd_remove_dir=True
 initrd_dst_img=tuned-initrd.img
 initrd_add_dir=${tmpdir}
-cmdline_cpu_part=+nohz=on${cmd_isolcpus} nohz_full=${isolated_cores} rcu_nocbs=${isolated_cores} tuned.non_isolcpus=${not_isolated_cpumask} intel_pstate=disable nosoftlockup
+cmdline_cpu_part=+nohz=on nohz_full=${isolated_cores} rcu_nocbs=${isolated_cores} tuned.non_isolcpus=${not_isolated_cpumask} intel_pstate=disable nosoftlockup