X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=module%2Fzfs%2Fvdev.c;h=662a877f8543a09d15a3bfa1e25b8de822f2a4c8;hb=refs%2Fheads%2Frertzinger%2Ffeature-zpool-get--p;hp=06097f355767d7f9f74cb7feda0469ca40ee98c7;hpb=295304bed6fa6744b8d011e36b9c2180311cedb2;p=zfs.git

diff --git a/module/zfs/vdev.c b/module/zfs/vdev.c
index 06097f3..662a877 100644
--- a/module/zfs/vdev.c
+++ b/module/zfs/vdev.c
@@ -61,9 +61,6 @@ static vdev_ops_t *vdev_ops_table[] = {
 	NULL
 };
 
-/* maximum scrub/resilver I/O queue per leaf vdev */
-int zfs_scrub_limit = 10;
-
 /*
  * Given a vdev type, return the appropriate ops vector.
  */
@@ -601,9 +598,9 @@ vdev_free(vdev_t *vd)
 		metaslab_group_destroy(vd->vdev_mg);
 	}
 
-	ASSERT3U(vd->vdev_stat.vs_space, ==, 0);
-	ASSERT3U(vd->vdev_stat.vs_dspace, ==, 0);
-	ASSERT3U(vd->vdev_stat.vs_alloc, ==, 0);
+	ASSERT0(vd->vdev_stat.vs_space);
+	ASSERT0(vd->vdev_stat.vs_dspace);
+	ASSERT0(vd->vdev_stat.vs_alloc);
 
 	/*
 	 * Remove this vdev from its parent's child list.
@@ -1258,11 +1255,12 @@ 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.
@@ -1827,7 +1825,7 @@ vdev_dtl_sync(vdev_t *vd, uint64_t txg)
 
 	if (vd->vdev_detached) {
 		if (smo->smo_object != 0) {
-			VERIFY(0 == dmu_object_free(mos, smo->smo_object, tx));
+			VERIFY0(dmu_object_free(mos, smo->smo_object, tx));
 			smo->smo_object = 0;
 		}
 		dmu_tx_commit(tx);
@@ -1857,6 +1855,7 @@ vdev_dtl_sync(vdev_t *vd, uint64_t txg)
 
 	space_map_truncate(smo, mos, tx);
 	space_map_sync(&smsync, SM_ALLOC, smo, mos, tx);
+	space_map_vacate(&smsync, NULL, NULL);
 
 	space_map_destroy(&smsync);
 
@@ -2031,7 +2030,7 @@ vdev_remove(vdev_t *vd, uint64_t txg)
 	tx = dmu_tx_create_assigned(spa_get_dsl(spa), txg);
 
 	if (vd->vdev_dtl_smo.smo_object) {
-		ASSERT3U(vd->vdev_dtl_smo.smo_alloc, ==, 0);
+		ASSERT0(vd->vdev_dtl_smo.smo_alloc);
 		(void) dmu_object_free(mos, vd->vdev_dtl_smo.smo_object, tx);
 		vd->vdev_dtl_smo.smo_object = 0;
 	}
@@ -2043,7 +2042,7 @@ vdev_remove(vdev_t *vd, uint64_t txg)
 			if (msp == NULL || msp->ms_smo.smo_object == 0)
 				continue;
 
-			ASSERT3U(msp->ms_smo.smo_alloc, ==, 0);
+			ASSERT0(msp->ms_smo.smo_alloc);
 			(void) dmu_object_free(mos, msp->ms_smo.smo_object, tx);
 			msp->ms_smo.smo_object = 0;
 		}
@@ -2321,7 +2320,7 @@ top:
 				(void) spa_vdev_state_exit(spa, vd, 0);
 				goto top;
 			}
-			ASSERT3U(tvd->vdev_stat.vs_alloc, ==, 0);
+			ASSERT0(tvd->vdev_stat.vs_alloc);
 		}
 
 		/*
@@ -3194,13 +3193,50 @@ 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 = gethrtime() - fio->io_timestamp;
+			if (delta > spa_deadman_synctime(spa)) {
+				zfs_dbgmsg("SLOW IO: zio timestamp %lluns, "
+				    "delta %lluns, last io %lluns",
+				    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);
 EXPORT_SYMBOL(vdev_online);
 EXPORT_SYMBOL(vdev_offline);
 EXPORT_SYMBOL(vdev_clear);
-
-module_param(zfs_scrub_limit, int, 0644);
-MODULE_PARM_DESC(zfs_scrub_limit, "Max scrub/resilver I/O per leaf vdev");
 #endif