Set default zvol elevator to noop

[mirror_zfs-debian.git] / module / zfs / zvol.c

diff --git a/module/zfs/zvol.c b/module/zfs/zvol.c
index b07476c4208507cbb9849a0317f51a4a6f1b7d71..c3bd25c3b610be4ea1a63f7ade350fa51bbedc12 100644 (file)
--- a/module/zfs/zvol.c
+++ b/module/zfs/zvol.c
@@ -1159,6 +1159,7 @@ static zvol_state_t *
 zvol_alloc(dev_t dev, const char *name)
 {
        zvol_state_t *zv;
+       int error = 0;
 
        zv = kmem_zalloc(sizeof (zvol_state_t), KM_SLEEP);
        if (zv == NULL)
@@ -1168,6 +1169,15 @@ zvol_alloc(dev_t dev, const char *name)
        if (zv->zv_queue == NULL)
                goto out_kmem;
 
+#ifdef HAVE_ELEVATOR_CHANGE
+       error = elevator_change(zv->zv_queue, "noop");
+#endif /* HAVE_ELEVATOR_CHANGE */
+       if (error) {
+               printk("ZFS: Unable to set \"%s\" scheduler for zvol %s: %d\n",
+                   "noop", name, error);
+               goto out_queue;
+       }
+
 #ifdef HAVE_BLK_QUEUE_FLUSH
        blk_queue_flush(zv->zv_queue, VDEV_REQ_FLUSH | VDEV_REQ_FUA);
 #else