diff options
Diffstat (limited to 'module/zfs/vdev.c')
| -rw-r--r-- | module/zfs/vdev.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/module/zfs/vdev.c b/module/zfs/vdev.c index afff4d423..15ff30fb3 100644 --- a/module/zfs/vdev.c +++ b/module/zfs/vdev.c @@ -3195,6 +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); |