--- trunk/grubby/new-kernel-pkg	2016/06/30 10:35:55	2993
+++ trunk/grubby/new-kernel-pkg	2016/06/30 10:39:38	2996
@@ -1061,4 +1061,13 @@
 # if we mounted the U-Boot directory, unmount it.
 [[ -n ${mounted} ]] && umount ${ubootDir}
 
+# make sure changes make it to the disk.
+# if /boot is a mountpoint, force the meta data on disk
+# to by-pass writeback delay.
+# PPC64LE-only to deal with Petitboot issues
+if [[ ${ARCH} = ppc64le ]]
+then
+    sync && mountpoint -q /boot && fsfreeze -f /boot && fsfreeze -u /boot
+fi
+
 exit 0