Add warning log for snapshot data mover fell backup to Velero native snapshot. (#6602)

Enlarge throttle of UT case TestThrottle_ShouldOutput to avoid occasional CI
failure due to timeout caused by test environment's CPU speed

Signed-off-by: Xun Jiang <jxun@vmware.com>

pkg/backup/item_backupper.go

@@ -525,6 +525,11 @@ func (ib *itemBackupper) takePVSnapshot(obj runtime.Unstructured, log logrus.Fie
 	// After that, this warning can be removed.
 	if boolptr.IsSetToTrue(ib.backupRequest.Spec.SnapshotMoveData) {
 		log.Warnf("VolumeSnapshotter plugin doesn't support data movement.")
+
+		if features.IsEnabled(velerov1api.CSIFeatureFlag) && pv.Spec.CSI == nil {
+			log.Warn("Cannot use CSI data mover to handle PV, because PV doesn't contain CSI in spec.",
+				" Fall back to Velero native snapshot.")
+		}
 	}
 
 	if ib.backupRequest.ResPolicies != nil {

pkg/uploader/kopia/progress_test.go

@@ -37,7 +37,7 @@ func TestThrottle_ShouldOutput(t *testing.T) {
 		expectedOutput bool
 	}{
 		{interval: time.Second, expectedOutput: true},
-		{interval: time.Second, throttle: time.Now().UnixNano() + int64(time.Nanosecond*10000), expectedOutput: false},
+		{interval: time.Second, throttle: time.Now().UnixNano() + int64(time.Nanosecond*100000000), expectedOutput: false},
 	}
 	p := new(Progress)
 	for _, tc := range testCases {