[Bug 231516] [ZFS] Crash upon dectection of failed drive.

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=231516

--- Comment #8 from commit-hook at freebsd.org ---
A commit references this bug:

Author: mav
Date: Thu Apr 25 15:51:01 UTC 2019
New revision: 346679
URL: https://svnweb.freebsd.org/changeset/base/346679

Log:
  MFC r339009 (by allanjude):
  Avoid panic when adjusting priority of a read in the face of an IO error

  PR:             231516
  Reported by:    sbruno
  Approved by:    re (rgrimes)
  Obtained from:  ZFS-on-Linux
  X-MFC-with:     334844
  Sponsored by:   Klara Systems

  MFV/ZoL:        Fix zio->io_priority failed (7 < 6) assert

  commit c26cf0966d131b722c32f8ccecfe5791a789d975
  Author: Tony Hutter <hutter2 at llnl.gov>
  Date:   Tue May 29 18:13:48 2018 -0700

    Fix zio->io_priority failed (7 < 6) assert

    This fixes an assert in vdev_queue_change_io_priority():

      VERIFY3(zio->io_priority < ZIO_PRIORITY_NUM_QUEUEABLE) failed (7 < 6)
      PANIC at vdev_queue.c:832:vdev_queue_change_io_priority()

    Reviewed-by: Tom Caputi <tcaputi at datto.com>
    Reviewed-by: George Melikov <mail at gmelikov.ru>
    Reviewed-by: Brian Behlendorf <behlendorf1 at llnl.gov>
    Signed-off-by: Tony Hutter <hutter2 at llnl.gov>

Changes:
_U  stable/11/
  stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_queue.c

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