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Date:      Thu, 15 May 2014 20:37:38 +0000
From:      Radim Kolar <hsn@sendmail.cz>
To:        Steven Hartland <killing@multiplay.co.uk>, "freebsd-fs@FreeBSD.org" <freebsd-fs@freebsd.org>, "bug-followup@freebsd.org" <bug-followup@freebsd.org>
Subject:   RE: kern/189355: zfs panic on 10-stable
Message-ID:  <BLU179-W4608DD52BA76CF84A4CDABAD360@phx.gbl>
In-Reply-To: <EB80EA4D187740B2B0AED9255EB386D2@multiplay.co.uk>
References:  <201405151240.s4FCe1Hw087808@freefall.freebsd.org>, <14010473114D42CC92756838300EEE64@multiplay.co.uk>, <BLU179-W70FBAE0611B8237808B4F7AD360@phx.gbl>, <BLU179-W50D5CEAEF125A4EA43B865AD360@phx.gbl> <BLU179-W6204A3A2EA88E7710CA8E4AD360@phx.gbl>, <EB80EA4D187740B2B0AED9255EB386D2@multiplay.co.uk>
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> Ok so thats what I thought it was could you see what vq is?
(kgdb) up 11
#11 0xc0cb8187 in vdev_queue_io_to_issue (vq=0xc46ab300)
    at /usr/src/sys/modules/zfs/../../cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_queue.c:489
489             if (avl_numnodes(&vq->vq_active_tree) >= zfs_vdev_max_active)
Current language:  auto; currently minimal
(kgdb) print vq
$1 = (vdev_queue_t *) 0xc46ab300
(kgdb) print *vq
$2 = {vq_vdev = 0xc46ab000, vq_class = {{vqc_active = 0, vqc_queued_tree = {
        avl_root = 0x0,
        avl_compar = 0xc0cb7de0 <vdev_queue_timestamp_compare>,
        avl_offset = 476, avl_numnodes = 0, avl_size = 732}}, {
      vqc_active = 0, vqc_queued_tree = {avl_root = 0x0,
        avl_compar = 0xc0cb7de0 <vdev_queue_timestamp_compare>,
        avl_offset = 476, avl_numnodes = 0, avl_size = 732}}, {
      vqc_active = 1, vqc_queued_tree = {avl_root = 0x0,
        avl_compar = 0xc0cb7d70 <vdev_queue_offset_compare>,
        avl_offset = 476, avl_numnodes = 0, avl_size = 732}}, {
      vqc_active = 0, vqc_queued_tree = {avl_root = 0x0,
        avl_compar = 0xc0cb7d70 <vdev_queue_offset_compare>,
        avl_offset = 476, avl_numnodes = 0, avl_size = 732}}, {
      vqc_active = 0, vqc_queued_tree = {avl_root = 0xc486c794,
        avl_compar = 0xc0cb7d70 <vdev_queue_offset_compare>,
        avl_offset = 476, avl_numnodes = 1, avl_size = 732}}, {
      vqc_active = 0, vqc_queued_tree = {avl_root = 0x0,
        avl_compar = 0xc0cb7d70 <vdev_queue_offset_compare>,
        avl_offset = 476, avl_numnodes = 0, avl_size = 732}}},
  vq_active_tree = {avl_root = 0xc476fa70,
    avl_compar = 0xc0cb7d70 <vdev_queue_offset_compare>, avl_offset = 476,
    avl_numnodes = 1, avl_size = 732}, vq_last_offset = 5941966336,
  vq_io_complete_ts = 7702783485, vq_lock = {lock_object = {
      lo_name = 0xc0d6b0ff "vq->vq_lock", lo_flags = 40960000, lo_data = 0,
      lo_witness = 0x0}, sx_lock = 3290710800}}
(kgdb)

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