disable transparent hugepage at boot

handlers/main.yml

@@ -10,3 +10,8 @@
     name: sentinel_{{ redis_sentinel_port }}
     state: restarted
   when: redis_as_service
+
+- name: "restart disable-transparent-hugepages"
+  service:
+    name: disable-transparent-hugepages
+    state: restarted

tasks/install.yml

@@ -8,6 +8,55 @@
     ignoreerrors: yes
   when: redis_travis_ci is not defined
 
+- name: Disable Transparent Hugepages
+  shell: |
+    if test -f /sys/kernel/mm/transparent_hugepage/enabled; then echo never > /sys/kernel/mm/transparent_hugepage/enabled; fi;
+    if test -f /sys/kernel/mm/transparent_hugepage/defrag; then echo never > /sys/kernel/mm/transparent_hugepage/defrag; fi;
+  when: redis_travis_ci is not defined  
+
+- name: create script to Disable Transparent Hugepages
+  template:
+    src: "{{ item }}"
+    dest: /etc/init.d/disable-transparent-hugepages
+    mode: 0755
+  # Choose the distro-specific template. We must specify the templates
+  # path here because with_first_found tries to find files in files/
+  with_first_found:
+    - files:
+      - "{{ ansible_os_family }}/disable-transparent-hugepages.j2"
+      - default/disable-transparent-hugepages.j2
+      paths:
+        - ../templates
+  when: ansible_service_mgr|default() != 'systemd'
+
+- name: create Disable Transparent Hugepages systemd service
+  template:
+    src: "{{ item }}"
+    dest: /etc/systemd/system/disable-transparent-hugepages.service
+    mode: 0644
+  with_first_found:
+    - files:
+      - "{{ ansible_os_family }}/disable-transparent-hugepages.service.j2"
+      - default/disable-transparent-hugepages.service.j2
+      paths:
+        - ../templates
+  register: dth_unit_file
+  when: ansible_service_mgr|default() == "systemd"
+
+- name: set Disable Transparent Hugepages to start at boot
+  service:
+    name: disable-transparent-hugepages
+    enabled: yes
+  when: 
+    - redis_travis_ci is not defined  
+
+- name: ensure Disable Transparent Hugepages is started
+  service:
+    name: disable-transparent-hugepages
+    state: started
+  when: 
+    - redis_travis_ci is not defined  
+
 - name: compile redis
   command: make -j{{ ansible_processor_cores + 1 }}{{ ' 32bit' if redis_make_32bit|bool else '' }}
   args:

templates/RedHat/disable-transparent-hugepages.j2

@@ -0,0 +1,40 @@
+#!/bin/sh
+### BEGIN INIT INFO
+# Provides:          disable-transparent-hugepages
+# Required-Start:    $local_fs
+# Required-Stop:
+# X-Start-Before:    redis_{{ redis_port }} sentinel_{{ redis_sentinel_port }}
+# Default-Start:     2 3 4 5
+# Default-Stop:      0 1 6
+# Short-Description: Disable Linux transparent huge pages
+# Description:       Disable Linux transparent huge pages, to improve
+#                    database performance.
+### END INIT INFO
+
+case $1 in
+  start)
+    if [ -d /sys/kernel/mm/transparent_hugepage ]; then
+      thp_path=/sys/kernel/mm/transparent_hugepage
+    elif [ -d /sys/kernel/mm/redhat_transparent_hugepage ]; then
+      thp_path=/sys/kernel/mm/redhat_transparent_hugepage
+    else
+      exit 0
+    fi
+
+    echo 'never' > ${thp_path}/enabled
+    echo 'never' > ${thp_path}/defrag
+
+    re='^[0-1]+$'
+    if [[ $(cat ${thp_path}/khugepaged/defrag) =~ $re ]]
+    then
+      # RHEL 7
+      echo 0  > ${thp_path}/khugepaged/defrag
+    else
+      # RHEL 6
+      echo 'no' > ${thp_path}/khugepaged/defrag
+    fi
+
+    unset re
+    unset thp_path
+    ;;
+esac

templates/default/disable-transparent-hugepages.j2

@@ -0,0 +1,29 @@
+#!/bin/sh
+### BEGIN INIT INFO
+# Provides:          disable-transparent-hugepages
+# Required-Start:    $local_fs
+# Required-Stop:
+# X-Start-Before:    redis_{{ redis_port }} sentinel_{{ redis_sentinel_port }}
+# Default-Start:     2 3 4 5
+# Default-Stop:      0 1 6
+# Short-Description: Disable Linux transparent huge pages
+# Description:       Disable Linux transparent huge pages, to improve
+#                    database performance.
+### END INIT INFO
+
+case $1 in
+  start)
+    if [ -d /sys/kernel/mm/transparent_hugepage ]; then
+      thp_path=/sys/kernel/mm/transparent_hugepage
+    elif [ -d /sys/kernel/mm/redhat_transparent_hugepage ]; then
+      thp_path=/sys/kernel/mm/redhat_transparent_hugepage
+    else
+      exit 0
+    fi
+
+    echo 'never' > ${thp_path}/enabled
+    echo 'never' > ${thp_path}/defrag
+
+    unset thp_path
+    ;;
+esac

templates/default/disable-transparent-hugepages.service.j2

@@ -0,0 +1,15 @@
+[Unit]
+Description=Disable Transparent Huge Pages
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/sh -c "/usr/bin/echo never | tee /sys/kernel/mm/transparent_hugepage/enabled"
+ExecStart=/usr/bin/sh -c "/usr/bin/echo never | tee /sys/kernel/mm/transparent_hugepage/defrag"
+{% if ansible_distribution_major_version == '6' %}
+ExecStart=/usr/bin/sh -c "/usr/bin/echo no | tee /sys/kernel/mm/transparent_hugepage/khugepaged/defrag"
+{% elif ansible_distribution_major_version == '7' %}
+ExecStart=/usr/bin/sh -c "/usr/bin/echo 0 | tee /sys/kernel/mm/transparent_hugepage/khugepaged/defrag"
+{% endif %}
+
+[Install]
+WantedBy=multi-user.target