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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

** Tags added: kernel-da-key kernel-hyper-v xenial

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https://bugs.launchpad.net/bugs/1541587

Title:
  Hang when iSCSI targets are removed

Status in linux package in Ubuntu:
  Triaged

Bug description:
  There is a problem (Hang) when iSCSI targets are removed in the 4.4.0
  kernel.  The problem looks like it spans from 3.18 to 4.5. There is a
  bug in scsi_scan.c (scsi_mod) and scsi_transport_fc.  Emulex tested a
  fix from Johannes(SUSE) that fixed it in the 4.4.0 kernel but I think
  it is still waiting to get picked up in a stable kernle.  This Hang
  can happen on any devloss and on driver unload.

  There is a patch from Bart van Asche that others reported is needed in
  order to fix this issue. It's called "Separate target visibility from
  reaped state information"

  https://patchwork.kernel.org/patch/7987711/

  This bug was brought to my attention by Dick Kennedy at Emulex (now
  acquired by Avago/Broadcom).

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