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apport-collect 1973875

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This change has been made by an automated script, maintained by the
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** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1973875

Title:
  nvme list-subsys <device>  don't show full assoiciations

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I create four associations as below

  # nvme list-subsys
  nnvme-subsys0 - NQN=nqn.1988-11.com.dell:powerstore:00:227c6d20994a5764BF97
  \
   +- nvme0 tcp traddr=172.16.100.161 trsvcid=4420 live
   +- nvme1 tcp traddr=172.16.100.162 trsvcid=4420 live
   +- nvme2 tcp traddr=fd31:d09b:724c:200:0000:ffff:ac10:c8a1 trsvcid=4420 live
   +- nvme3 tcp traddr=fd31:d09b:724c:200:0000:ffff:ac10:c8a2 trsvcid=4420 live

  however,  if i check individual namespace, there only have three.

  # nvme list-subsys /dev/nvme0n1
  nvme-subsys0 - NQN=nqn.1988-11.com.dell:powerstore:00:227c6d20994a5764BF97
  \
   +- nvme0 tcp traddr=172.16.100.161 trsvcid=4420 live optimized
   +- nvme1 tcp traddr=172.16.100.162 trsvcid=4420 live non-optimized
   +- nvme3 tcp traddr=fd31:d09b:724c:200:0000:ffff:ac10:c8a2 trsvcid=4420 live 
non-optimized

  
  # nvme list-subsys /dev/nvme0n2
  nvme-subsys0 - NQN=nqn.1988-11.com.dell:powerstore:00:227c6d20994a5764BF97
  \
   +- nvme0 tcp traddr=172.16.100.161 trsvcid=4420 live non-optimized
   +- nvme1 tcp traddr=172.16.100.162 trsvcid=4420 live optimized
   +- nvme3 tcp traddr=fd31:d09b:724c:200:0000:ffff:ac10:c8a2 trsvcid=4420 live 
optimized

  
  also it affect iostate output

  # iostat 4 ALL | egrep 'n2 '
  nvme0c0n2         0.02         0.32         0.00         0.00       1108      
    0          0
  nvme0c1n2         0.00         0.04         0.00         0.00        128      
    0          0
  nvme0c3n2         0.00         0.04         0.00         0.00        128      
    0          0
  nvme0n2           0.00         0.00         0.00         0.00          0      
    0          0

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