Public bug reported:

Originally reported at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1678184/comments/79

The user uses "nvme_core.default_ps_max_latency_us=6000" but the issue
still happens.

$ sudo nvme id-ctrl /dev/nvme0
NVME Identify Controller:
vid : 0x14a4
ssvid : 0x1b4b
sn : TW0XVRV7LOH006AJ09F1
mn : CX2-8B256-Q11 NVMe LITEON 256GB
fr : 48811QD
rab : 0
ieee : 002303
cmic : 0
mdts : 5
cntlid : 1
ver : 10200
rtd3r : f4240
rtd3e : f4240
oaes : 0
oacs : 0x1f
acl : 3
aerl : 3
frmw : 0x14
lpa : 0x2
elpe : 63
npss : 4
avscc : 0x1
apsta : 0x1
wctemp : 358
cctemp : 368
mtfa : 50
hmpre : 0
hmmin : 0
tnvmcap : 256060514304
unvmcap : 0
rpmbs : 0
sqes : 0x66
cqes : 0x44
nn : 1
oncs : 0x1f
fuses : 0
fna : 0
vwc : 0x1
awun : 255
awupf : 7
nvscc : 1
acwu : 0
sgls : 0
ps 0 : mp:8.00W operational enlat:0 exlat:0 rrt:0 rrl:0
          rwt:0 rwl:0 idle_power:- active_power:-
ps 1 : mp:4.00W operational enlat:5 exlat:5 rrt:1 rrl:1
          rwt:1 rwl:1 idle_power:- active_power:-
ps 2 : mp:2.10W operational enlat:5 exlat:5 rrt:2 rrl:2
          rwt:2 rwl:2 idle_power:- active_power:-
ps 3 : mp:0.1000W non-operational enlat:5000 exlat:5000 rrt:3 rrl:3
          rwt:3 rwl:3 idle_power:- active_power:-
ps 4 : mp:0.0100W non-operational enlat:50000 exlat:100000 rrt:4 rrl:4
          rwt:4 rwl:4 idle_power:- active_power:-

** Affects: linux (Ubuntu)
     Importance: Undecided
     Assignee: Kai-Heng Feng (kaihengfeng)
         Status: Confirmed

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https://bugs.launchpad.net/bugs/1694596

Title:
  LiteOn NVMe APST issue

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Originally reported at:
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1678184/comments/79

  The user uses "nvme_core.default_ps_max_latency_us=6000" but the issue
  still happens.

  $ sudo nvme id-ctrl /dev/nvme0
  NVME Identify Controller:
  vid : 0x14a4
  ssvid : 0x1b4b
  sn : TW0XVRV7LOH006AJ09F1
  mn : CX2-8B256-Q11 NVMe LITEON 256GB
  fr : 48811QD
  rab : 0
  ieee : 002303
  cmic : 0
  mdts : 5
  cntlid : 1
  ver : 10200
  rtd3r : f4240
  rtd3e : f4240
  oaes : 0
  oacs : 0x1f
  acl : 3
  aerl : 3
  frmw : 0x14
  lpa : 0x2
  elpe : 63
  npss : 4
  avscc : 0x1
  apsta : 0x1
  wctemp : 358
  cctemp : 368
  mtfa : 50
  hmpre : 0
  hmmin : 0
  tnvmcap : 256060514304
  unvmcap : 0
  rpmbs : 0
  sqes : 0x66
  cqes : 0x44
  nn : 1
  oncs : 0x1f
  fuses : 0
  fna : 0
  vwc : 0x1
  awun : 255
  awupf : 7
  nvscc : 1
  acwu : 0
  sgls : 0
  ps 0 : mp:8.00W operational enlat:0 exlat:0 rrt:0 rrl:0
            rwt:0 rwl:0 idle_power:- active_power:-
  ps 1 : mp:4.00W operational enlat:5 exlat:5 rrt:1 rrl:1
            rwt:1 rwl:1 idle_power:- active_power:-
  ps 2 : mp:2.10W operational enlat:5 exlat:5 rrt:2 rrl:2
            rwt:2 rwl:2 idle_power:- active_power:-
  ps 3 : mp:0.1000W non-operational enlat:5000 exlat:5000 rrt:3 rrl:3
            rwt:3 rwl:3 idle_power:- active_power:-
  ps 4 : mp:0.0100W non-operational enlat:50000 exlat:100000 rrt:4 rrl:4
            rwt:4 rwl:4 idle_power:- active_power:-

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