Merge pull request #181 from leseb/transparent-hugepages

Ability to disable transparent hugepage

roles/ceph-common/defaults/main.yml

@@ -119,6 +119,7 @@ radosgw: false # referenced in monitor role too.
 # OS TUNING
 ###########
 
+disable_transparent_hugepage: true
 os_tuning_params:
   - { name: kernel.pid_max, value: 4194303 }
   - { name: fs.file-max, value: 26234859 }

roles/ceph-common/tasks/os_tuning.yml

@@ -3,6 +3,11 @@
   command: updatedb -e /var/lib/ceph
   ignore_errors: true
 
+- name: Disable transparent hugepage
+  command: "echo never > /sys/kernel/mm/redhat_transparent_hugepage/enabled"
+  ignore_errors: true
+  when: disable_transparent_hugepage
+
 - name: Apply OS tuning
   sysctl: >
     name={{ item.name }}