add support for hugepages to nova flavors

Nova flavors need to be properly configured to use hugepages
backed memory. This patch performs flavors configuration on plugin startup

Change-Id: I05da7e7069e63c07d47c8996326df8ca53536811

1 files changed, 10 insertions, 0 deletions

diff --git a/devstack/plugin.sh b/devstack/plugin.sh
index 64c3d1a..b55e76a 100644
--- a/devstack/plugin.sh
+++ b/devstack/plugin.sh
@@ -51,6 +51,12 @@ function configure_ml2_for_fast_path {
     fi
 }
 
+function nova_set_hugepages_flavor {
+    for flavor_id in $(nova flavor-list | awk '{print $2}' | grep [0-9]); do
+        nova flavor-key $flavor_id set hw:mem_page_size=large
+    done
+}
+
 # main loop
 if is_service_enabled net-6wind; then
     source $NET_6WIND_DIR/devstack/libs/fast-path
@@ -69,6 +75,10 @@ if is_service_enabled net-6wind; then
         if is_service_enabled neutron; then
             configure_ml2_for_fast_path
         fi
+    elif [[ "$1" == "stack" && "$2" == "extra" ]]; then
+        if is_service_enabled nova; then
+            nova_set_hugepages_flavor
+        fi
     fi
 
     if [[ "$1" == "unstack" ]]; then