Extend --wait-clean to checkpoint resync

Root file systems backed by external metadata arrays need to be
explicitly checkpointed near the time the rootfs is marked readonly as
userspace will not have an opportunity to react to the final shutdown of
the array.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/Monitor.c b/Monitor.c
index 8d8939c..a080390 100644
--- a/Monitor.c
+++ b/Monitor.c
@@ -686,6 +686,9 @@ int WaitClean(char *dev)
 		tm.tv_sec = 5;
 		tm.tv_usec = 0;
 
+		/* give mdmon a chance to checkpoint resync */
+		sysfs_set_str(mdi, NULL, "sync_action", "idle");
+
 		FD_ZERO(&fds);
 
 		/* wait for array_state to be clean */