hammerhead: Shorter down lock durations

Change-Id: I703421dd1f5c99f65213fe855cd4e5b96440d756
Signed-off-by: Dan Trifan <jimsth@gmail.com>
hammerhead: Reenable load based syncs

Change-Id: I7980558bcf4b1f166ced4177e39f5df7fe73dde6
Signed-off-by: Dan Trifan <jimsth@gmail.com>
Merge changes I7980558b,I703421dd into kk44

* changes:
  hammerhead: Reenable load based syncs
  hammerhead: Shorter down lock durations