Comment 2 for bug 1833716

== Bionic GA 4.15.0 kernel ==

ubuntu@P8lpar4:~$ sudo su
root@P8lpar4:/home/ubuntu# drmgr -c cpu -r -q 1
Validating CPU DLPAR capability...yes.
CPU 121
root@P8lpar4:/home/ubuntu# drmgr -c cpu -a -q 1

[262984.440091] BUG: arch topology borken [262984.440110] the DIE domain not a subset of the NODE domain
[262984.440114] BUG: arch topology borken
[262984.440116] the DIE domain not a subset of the NODE domain
[262984.440120] BUG: arch topology borken
[262984.440122] the DIE domain not a subset of the NODE domain
[262984.443241] Unable to handle kernel paging request for data at address 0x50dbee4a
[262984.443261] Faulting instruction address: 0xc00000000017982c [262984.443281] LE SMP NR_CPUS=2048 NUMA pSeries
m iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables
ync_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear ibmvscs
[262984.443323] CPU: 120 PID: 1467 Comm: kworker/120:2 Not tainted 4.15.0-52-generic
#56-Ubuntu
[262984.443331] Workqueue: events cpuset_hotplug_workfn
[262984.443334] NIP: c00000000017982c LR: c000000000179908 CTR: 0000000000000000
[262984.443341] MSR: 8000000000009033 <SF,EE,ME,IR,DR,RI,LE> CR: 22824228 XER: 000
00005
      [262984.443349] GPR00: c000000000179908 c000000fcec0b7b0 c0000000016eb800 c000000f7c4
[262984.443349] GPR04: 0000000000000001 0000000000000000 0000000000000008 00000000000
[262984.443349] GPR08: 0000000000000018 ffffffffffffffff c000000fe22f5808 00000000000
1c600
[262984.443349] GPR16: 00000000000003c0 c000000001722494 c000000fd249d800 00000000000
00001
[262984.443349] GPR20: c000000ff7068580 0000000000000008 c0000000011d8580 c0000000017
[262984.443349] GPR24: 0000000000000000 ffffffffffffe830 ffffffffffffec30 00000000000
0102f
65d75
[262984.443389] LR [c000000000179908] destroy_sched_domain+0x38/0xc0
[262984.443392] Call Trace:
[262984.443395] [c000000fcec0b7b0] [ffffffffffffec30] 0xffffffffffffec30 (unreliable)
[262984.443400] [c000000fcec0b7f0] [c000000000179908] destroy_sched_domain+0x38/0xc0
[262984.443404] [c000000fcec0b820] [c000000000179e10] cpu_attach_domain+0xf0/0x870
[262984.443408] [c000000fcec0b960] [c00000000017b7e4] build_sched_domains+0x1254/0x12
f0
[262984.443412] [c000000fcec0ba90] [c00000000017c9d0] partition_sched_domains+0x2d0/0
x410
[262984.443416] [c000000fcec0bb20] [c000000000202b20] rebuild_sched_domains_locked+0x
60/0x80
[262984.443420] [c000000fcec0bb50] [c000000000205e28] rebuild_sched_domains+0x38/0x60
[262984.443424] [c000000fcec0bb80] [c000000000205f88] cpuset_hotplug_workfn+0x138/0xb
 60
[262984.443429] [c000000fcec0bc90] [c000000000138798] process_one_work+0x298/0x5a0
[262984.443433] [c000000fcec0bd20] [c000000000138b38] worker_thread+0x98/0x630
[262984.443436] [c000000fcec0bdc0] [c000000000141728] kthread+0x1a8/0x1b0
[262984.451901] [c000000fcec0be30] [c00000000000b65c] ret_from_kernel_thread+0x5c/0x8
0
[262984.451904] Instruction dump:
[262984.451906] 7d908026 fbe1fff8 91810008 f8010010 f821ffc1 7c7d1b78 2e240000 7c7f1b
78
[262984.451912] 48000010 7fbee840 7fdff378 419e0074 <ebdf0000> 4192002c 7c0004ac e95f
0010
[262984.451919] ---[ end trace b6da6a7114e365f9 ]---
[262984.454656]

== After the patches are applied 4.15.0 ==
      ubuntu@P8lpar4:~$ uname -a
Linux P8lpar4 4.15.0-53-generic #57~lp1833716+build.1-Ubuntu SMP Fri Jun 21 15:18:40 UTC 2019 ppc64le ppc64le ppc64le GNU/Linux
ubuntu@P8lpar4:~$

ubuntu@P8lpar4:~$ sudo su
root@P8lpar4:/home/ubuntu# drmgr -c cpu -r -q 1
Validating CPU DLPAR capability...yes.
CPU 121
root@P8lpar4:/home/ubuntu# drmgr -c cpu -a -q 1
Validating CPU DLPAR capability...yes.
CPU 121
root@P8lpar4:/home/ubuntu#

     Ubuntu 18.04.2 LTS P8lpar4 hvc0

P8lpar4 login: [ 25.687520] cloud-init[3439]: Cloud-init v. 19.1-1-gbaa47854-0ubunt
u1~18.04.1 running 'modules:final' at Mon, 24 Jun 2019 16:37:33 +0000. Up 25.30 secon
ds.