Although an object may already be known in the configuration, it's

worker thread may have been destroyed (e.g. during orphaning).

Make sure that objects get back their worker threads when they get a
new geom.

1 files changed, 11 insertions, 3 deletions

diff --git a/sys/geom/vinum/geom_vinum_drive.c b/sys/geom/vinum/geom_vinum_drive.c
index 244e169..279d569 100644
--- a/sys/geom/vinum/geom_vinum_drive.c
+++ b/sys/geom/vinum/geom_vinum_drive.c
@@ -535,13 +535,21 @@ gv_drive_taste(struct g_class *mp, struct g_provider *pp, int flags __unused)
 			d->freelist_entries = 1;
 
 			TAILQ_INIT(&d->bqueue);
+
+			/* Save it into the main configuration. */
+			LIST_INSERT_HEAD(&sc->drives, d, drive);
+		}
+
+		/*
+		 * Create a bio queue mutex and a worker thread, if necessary.
+		 */
+		if (mtx_initialized(&d->bqueue_mtx) == 0)
 			mtx_init(&d->bqueue_mtx, "gv_drive", NULL, MTX_DEF);
+
+		if (!(d->flags & GV_DRIVE_THREAD_ACTIVE)) {
 			kthread_create(gv_drive_worker, d, NULL, 0, 0,
 			    "gv_d %s", d->name);
 			d->flags |= GV_DRIVE_THREAD_ACTIVE;
-
-			/* Save it into the main configuration. */
-			LIST_INSERT_HEAD(&sc->drives, d, drive);
 		}
 
 		g_access(cp, -1, 0, 0);