Public bug reported:
---Problem Description---
Bolt based NVMe disks (namespaces) are not displayed on lsblk and
/dev/disk/by-path
# nvme list
Node SN Model
Namespace Usage Format FW Rev
---------------- -------------------- ----------------------------------------
--------- -------------------------- ---------------- --------
/dev/nvme0n1 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
1 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n10 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
10 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n11 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
11 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n12 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
12 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n13 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
13 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n14 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
14 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n15 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
15 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n16 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
16 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n17 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
17 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n18 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
18 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n19 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
19 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n2 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
2 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n20 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
20 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n21 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
21 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n22 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
22 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n23 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
23 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n24 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
24 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n25 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
25 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n26 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
26 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n27 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
27 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n28 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
28 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n29 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
29 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n3 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
3 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n30 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
30 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n31 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
31 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n32 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
32 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n4 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
4 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n5 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
5 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n6 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
6 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n7 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
7 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n8 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
8 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
/dev/nvme0n9 S3RVNA0J600206 PCIe3 1.6TB NVMe Flash Adapter II x8
9 28.67 GB / 28.67 GB 4 KiB + 0 B MN12MN12
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 1 931.5G 0 disk
??sda1 8:1 1 7M 0 part
??sda2 8:2 1 931.5G 0 part /
sdb 8:16 1 931.5G 0 disk
??sdb1 8:17 1 7M 0 part
??sdb2 8:18 1 9.3G 0 part
??sdb3 8:19 1 856.8G 0 part
??sdb4 8:20 1 1K 0 part
??sdb5 8:21 1 1G 0 part
??sdb6 8:22 1 64.4G 0 part
??rhelaa_ltciofvtr--spoon400-swap 253:0 0 4G 0 lvm
??rhelaa_ltciofvtr--spoon400-home 253:1 0 19.8G 0 lvm
??rhelaa_ltciofvtr--spoon400-root 253:2 0 40.6G 0 lvm
---uname output---
# uname -a Linux ltciofvtr-spoon4 4.15.0-10-generic #11-Ubuntu SMP Tue Feb 13
18:21:52 UTC 2018 ppc64le ppc64le ppc64le GNU/Linux
Machine Type = AC922
---Steps to Reproduce---
1> install Ubuntu 18.04 on AC922 system
2> make sure Bolt adapter is present in the system
0003:01:00.0 Non-Volatile memory controller [0108]: Samsung Electronics Co Ltd
NVMe SSD Controller 172Xa [144d:a822] (rev 01)
3> create name space using following script
#!/bin/bash
device=/dev/nvme0
echo $device
nvme format $device
nvme set-feature $device -f 0x0b --value=0x0100
nvme delete-ns $device -n 0xFFFFFFFF
sleep 5
nvme list
nvme get-log $device -l 200 -i 4
max=`nvme id-ctrl $device | grep ^nn | awk '{print $NF}'`
for i in $(eval echo {1..$max})
do
echo $i
nvme create-ns $device --nsze=7000000 --ncap=7000000 --flbas=0 --dps=0
nvme attach-ns $device --namespace-id=$i --controllers=`nvme list-ctrl
$device | awk -F: '{print $2}'`
sleep 2
nvme get-log $device -l 200 -i 4
sleep 2
done
nvme list
4> run #nvme ns-rescan /dev/nvme0 ; #lsblk
==
After discussion with the owner of lsblk and several maintainers of nvme
developers, we removed slaves and holders for multipath NVME.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/nvme/host/core.c?h=v4.16-rc6&id=8a30ecc6e0ecbb9ae95daf499b2680b885ed0349
Revert "nvme: create 'slaves' and 'holders' entries for hidden cont
I have verified the patch with the latest kernel. Please include above
patch in Ubuntu18.04
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage)
Status: New
** Tags: architecture-ppc64le bugnameltc-164830 severity-medium
targetmilestone-inin1804
** Tags added: architecture-ppc64le bugnameltc-164830 severity-medium
targetmilestone-inin1804
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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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