X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=module%2Fzfs%2Fvdev.c;h=15ff30fb3b4e585ea51a8ee948953b454651f950;hb=55d85d5a8c45c4559a4a0e675c37b0c3afb19c2f;hp=06097f355767d7f9f74cb7feda0469ca40ee98c7;hpb=295304bed6fa6744b8d011e36b9c2180311cedb2;p=zfs.git

diff --git a/module/zfs/vdev.c b/module/zfs/vdev.c
index 06097f3..15ff30f 100644
--- a/module/zfs/vdev.c
+++ b/module/zfs/vdev.c
@@ -1258,11 +1258,12 @@ vdev_open(vdev_t *vd)
 	if (vd->vdev_asize == 0) {
 		/*
 		 * This is the first-ever open, so use the computed values.
-		 * For testing purposes, a higher ashift can be requested.
+		 * For compatibility, a different ashift can be requested.
 		 */
 		vd->vdev_asize = asize;
 		vd->vdev_max_asize = max_asize;
-		vd->vdev_ashift = MAX(ashift, vd->vdev_ashift);
+		if (vd->vdev_ashift == 0)
+			vd->vdev_ashift = ashift;
 	} else {
 		/*
 		 * Detect if the alignment requirement has increased.
@@ -3194,6 +3195,46 @@ vdev_split(vdev_t *vd)
 	vdev_propagate_state(cvd);
 }
 
+void
+vdev_deadman(vdev_t *vd)
+{
+	int c;
+
+	for (c = 0; c < vd->vdev_children; c++) {
+		vdev_t *cvd = vd->vdev_child[c];
+
+		vdev_deadman(cvd);
+	}
+
+	if (vd->vdev_ops->vdev_op_leaf) {
+		vdev_queue_t *vq = &vd->vdev_queue;
+
+		mutex_enter(&vq->vq_lock);
+		if (avl_numnodes(&vq->vq_pending_tree) > 0) {
+			spa_t *spa = vd->vdev_spa;
+			zio_t *fio;
+			uint64_t delta;
+
+			/*
+			 * Look at the head of all the pending queues,
+			 * if any I/O has been outstanding for longer than
+			 * the spa_deadman_synctime we log a zevent.
+			 */
+			fio = avl_first(&vq->vq_pending_tree);
+			delta = ddi_get_lbolt64() - fio->io_timestamp;
+			if (delta > NSEC_TO_TICK(spa_deadman_synctime(spa))) {
+				zfs_dbgmsg("SLOW IO: zio timestamp %llu, "
+				    "delta %llu, last io %llu",
+				    fio->io_timestamp, delta,
+				    vq->vq_io_complete_ts);
+				zfs_ereport_post(FM_EREPORT_ZFS_DELAY,
+				    spa, vd, fio, 0, 0);
+			}
+		}
+		mutex_exit(&vq->vq_lock);
+	}
+}
+
 #if defined(_KERNEL) && defined(HAVE_SPL)
 EXPORT_SYMBOL(vdev_fault);
 EXPORT_SYMBOL(vdev_degrade);