# [OmniOS-discuss] Kernel Panic - ZFS on iSCSI target and transferring data.

Dan McDonald danmcd at omniti.com
Wed May 21 15:20:10 UTC 2014

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    On May 21, 2014, at 5:53 AM, Svavar Örn Eysteinsson <svavar at januar.is> wrote:

    <SNIP!>

    >                 panicstr = BAD TRAP: type=8 (#df Double fault) rp=ffffff04e3069f10 addr=0
    >                 panicstack = unix:real_mode_stop_cpu_stage2_end+9de3 () | unix:trap+ca5 () | unix:_patch_xrstorq_rbx+196 () | zfs:zio_vdev_delegated_io+86 () | zfs:vdev_queue_aggregate+298 () | zfs:vdev_queue_io_to_issue+5e () | zfs:vdev_queue_io_done+88 () | zfs:zio_vdev_io_done+80 () | zfs:zio_execute+88 () | zfs:vdev_queue_io_done+78 () | zfs:zio_vdev_io_done+80 () | zfs:zio_execute+88 () | zfs:vdev_queue_io_done+78 () | zfs:zio_vdev_io_done+80 () | zfs:zio_execute+88 () | zfs:vdev_queue_io_done+78 () | zfs:zio_vdev_io_done+80 () | zfs:zio_execute+88 () | zfs:vdev_queue_io_done+78 () | zfs:zio_vdev_io_done+80 () | zfs:zio_execute+88 () | zfs:vdev_queue_io_done+78 () | zfs:zio_vdev_io_done+80 () | zfs:zio_execute+88 () | zfs:vdev_queue_io_done+78 () | zfs:zio_vdev_io_done+80 () | zfs:zio_execute+88 () | zfs:vdev_queue_io_done+78 () | zfs:zio_vdev_io_done+80 () | zfs:zio_execute+88 () | zfs:vdev_queue_io_done+78 () | zfs:zio_vdev_io_done+80 () | zfs:zio_execute+88 () | zfs:vdev_queue_io_done+78 () | zfs:zio_vdev_io_done+80 () | zfs:zio_execute+88 () | zfs:vdev_queue_io_done+78 () | zfs:zio_vdev_io_done+80 () | zfs:zio_execute+88 () | zfs:vdev_queue_io_done+78 () | zfs:zio_vdev_io_done+80 () | zfs:zio_execute+88 () | zfs:vdev_queue_io_done+78 () | zfs:zio_vdev_io_done+80 () | zfs:zio_execute+88 () | zfs:vdev_queue_io_done+78 () | zfs:zio_vdev_io_done+80 () | zfs:zio_execute+88 () | zfs:vdev_queue_io_done+78 () | zfs:zio_vdev_io_done+80 () | zfs:zio_execute+88 () | zfs:vdev_queue_io_done+78 () | zfs:zio_vdev_io_done+80 () | zfs:zio_execute+88 () | zfs:vdev_queue_io_done+78 () | zfs:zio_vdev_io_done+80 () | zfs:zio_execute+88 () | zfs:vdev_queue_io_done+78 () | zfs:zio_vdev_io_done+80 () | zfs:zio_execute+88 () | zfs:vdev_queue_io_done+78 () | zfs:zio_vdev_io_done+80 () | zfs:zio_execute+88 () | zfs:vdev_queue_io_done+78 () | zfs:zio_vdev_io_done+80 () | zfs:zio_execute+88 () | zfs:vdev_queue_io_done+78 () | zfs:zio_vdev_io_done+80 () | zfs:zio_execute+88 () | zfs:vdev_queue_io_done+78 () | zfs:zio_vdev_io_done+80 () |

    Oh how cute, the kernel somehow managed to infinitely recurse, causing a stack overflow!

    > The only feature that I have enabled on this zPool and or ZFS dataset is a Lz4 compression on the zfs dataset.

    Hmmm, lz4 compression and stack overflow?  I see one illumos bug related to that:

    	https://www.illumos.org/issues/3705

    But that bug's fix has been in OmniOS since r151006.  You're not running something older, are you?

    There ARE new ZFS fixes in r151010, and if you can, I'd highly recommend the upgrade.

    Dan

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