------- Comment From naveed...@in.ibm.com 2018-05-17 02:50 EDT-------
(In reply to comment #15)
> Still namespaces are not visible under /dev/disk/by-path
>
>
> # ll /dev/disk/by-path/ | grep -i nvme
> #
> # nvme list | grep nvme | wc -l
> 32
> #

I am able to view the(In reply to comment #16)
> Can you ensure you are booted into the test kernel posted in comment #2?  It
> should have the following text in the uname -a output: "lp1758205"

we do not see the nvme devices in disk/by-path even in above said kernel
and -20 kernel

===console logs===
# ll /dev/disk/by-path/ | grep -i nvme
# uname -a
Linux ltciofvtr-spoon4 4.15.0-12-generic #13~lp1758205 SMP Tue Mar 27 16:09:39 
UTC 2018 ppc64le ppc64le ppc64le GNU/Linux
# nvme list
Node             SN                   Model                                    
Namespace Usage                      Format           FW Rev
---------------- -------------------- ---------------------------------------- 
--------- -------------------------- ---------------- --------
/dev/nvme0n1     S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
1          24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n10    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
10         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n11    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
11         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n12    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
12         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n13    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
13         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n14    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
14         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n15    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
15         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n16    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
16         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n17    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
17         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n18    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
18         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n19    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
19         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n2     S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
2          24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n20    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
20         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n21    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
21         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n22    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
22         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n23    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
23         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n24    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
24         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n25    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
25         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n26    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
26         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n27    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
27         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n28    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
28         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n29    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
29         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n3     S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
3          24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n30    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
30         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n31    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
31         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n32    S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
32         24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n4     S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
4          24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n5     S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
5          24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n6     S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
6          24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n7     S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
7          24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n8     S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
8          24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12
/dev/nvme0n9     S3RVNA0J600206       PCIe3 1.6TB NVMe Flash Adapter II x8     
9          24.58  GB /  24.58  GB      4 KiB +  0 B   MN12MN12

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https://bugs.launchpad.net/bugs/1758205

Title:
  Ubuntu 18.04 NVMe disks are not displayed on lsblk and /dev/disk/by-
  path (NVMe / Bolt ) (systemd?)

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