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diff --git a/profiles/cpu-partitioning/script.sh b/profiles/cpu-partitioning/script.sh
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index 84e04fd..8677050 100755
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--- a/profiles/cpu-partitioning/script.sh
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+++ b/profiles/cpu-partitioning/script.sh
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@@ -2,6 +2,38 @@
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. /usr/lib/tuned/functions
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+no_balance_cpus_file=$STORAGE/no-balance-cpus.txt
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+
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+change_sd_balance_bit()
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+{
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+ local set_bit=$1
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+ local flags_cur=
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+ local file=
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+ local cpu=
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+
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+ for cpu in $(cat $no_balance_cpus_file); do
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+ for file in $(find /proc/sys/kernel/sched_domain/cpu$cpu -name flags -print); do
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+ flags_cur=$(cat $file)
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+ if [ $set_bit -eq 1 ]; then
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+ flags_cur=$((flags_cur | 0x1))
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+ else
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+ flags_cur=$((flags_cur & 0xfffe))
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+ fi
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+ echo $flags_cur > $file
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+ done
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+ done
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+}
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+
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+disable_balance_domains()
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+{
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+ change_sd_balance_bit 0
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+}
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+
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+enable_balance_domains()
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+{
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+ change_sd_balance_bit 1
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+}
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+
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start() {
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mkdir -p "${TUNED_tmpdir}/etc/systemd"
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mkdir -p "${TUNED_tmpdir}/usr/lib/dracut/hooks/pre-udev"
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@@ -9,6 +41,9 @@ start() {
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cp 00-tuned-pre-udev.sh "${TUNED_tmpdir}/usr/lib/dracut/hooks/pre-udev/"
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setup_kvm_mod_low_latency
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disable_ksm
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+
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+ echo "$TUNED_no_balance_cores_expanded" | sed 's/,/ /g' > $no_balance_cpus_file
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+ disable_balance_domains
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return "$?"
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}
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@@ -18,6 +53,7 @@ stop() {
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teardown_kvm_mod_low_latency
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enable_ksm
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fi
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+ enable_balance_domains
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return "$?"
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}
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diff --git a/profiles/cpu-partitioning/tuned.conf b/profiles/cpu-partitioning/tuned.conf
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index 979e40b..842e2bd 100644
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--- a/profiles/cpu-partitioning/tuned.conf
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+++ b/profiles/cpu-partitioning/tuned.conf
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@@ -35,8 +35,6 @@ no_balance_cores_expanded=${f:cpulist_unpack:${no_balance_cores}}
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# Fail if isolated_cores contains CPUs which are not online
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assert2=${f:assertion:isolated_cores contains online CPU(s):${isolated_cores_expanded}:${isolated_cores_online_expanded}}
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-cmd_isolcpus=${f:regex_search_ternary:${no_balance_cores}:\s*[0-9]: isolcpus=${no_balance_cores}:}
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-
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[sysctl]
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kernel.hung_task_timeout_secs = 600
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kernel.nmi_watchdog = 0
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@@ -68,4 +66,4 @@ priority=10
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initrd_remove_dir=True
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initrd_dst_img=tuned-initrd.img
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initrd_add_dir=${tmpdir}
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-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
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+cmdline_cpu_part=+nohz=on nohz_full=${isolated_cores} rcu_nocbs=${isolated_cores} tuned.non_isolcpus=${not_isolated_cpumask} intel_pstate=disable nosoftlockup
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