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Problem Description
===============================
When testing cpu, memory and slot DLPAR on roselp4, the system crashed.
---uname output---
Linux roselp4 4.8.0-34-generic #36~16.04.1-Ubuntu SMP Wed Dec 21 18:53:20 UTC
2016 ppc64le ppc64le ppc64le GNU/Linux
Machine Type = lpar
Stack trace output:
[ 3289.065350] Unable to handle kernel paging request for data at address
0xc0000404565d6a00
[ 3289.065375] Faulting instruction address: 0xc0000000002e6eec
[ 3289.065379] Oops: Kernel access of bad area, sig: 11 [#1]
[ 3289.065382] SMP NR_CPUS=2048 NUMA pSeries
[ 3289.065386] Modules linked in: rpadlpar_io rpaphp dccp_diag dccp tcp_diag
udp_diag inet_diag unix_diag af_packet_diag netlink_diag rpcsec_gss_krb5
auth_rpcgss nfsv4 nfs lockd grace fscache rdma_ucm(OE) ib_ucm(OE) rdma_cm(OE)
iw_cm(OE) configfs ib_ipoib(OE) ib_cm(OE) ib_uverbs(OE) ib_umad(OE) mlx5_ib(OE)
mlx5_core(OE) mlx4_ib(OE) mlx4_en(OE) ib_sa(OE) ib_mad(OE) ib_core(OE)
ib_addr(OE) ib_netlink(OE) mlx4_core(OE) mlx_compat(OE) binfmt_misc pseries_rng
vmx_crypto sunrpc knem(OE) autofs4 dm_round_robin btrfs xor raid6_pq lpfc
crc32c_vpmsum ipr scsi_transport_fc devlink be2net scsi_dh_emc scsi_dh_rdac
scsi_dh_alua dm_multipath [last unloaded: mlx4_core]
[ 3289.065424] CPU: 82 PID: 40197 Comm: drmgr Tainted: G OE
4.8.0-34-generic #36~16.04.1-Ubuntu
[ 3289.065427] task: c00000045081ce00 task.stack: c00000044d414000
[ 3289.065430] NIP: c0000000002e6eec LR: c0000000002e7718 CTR: c0000000002e7630
[ 3289.065433] REGS: c00000044d417470 TRAP: 0300 Tainted: G OE
(4.8.0-34-generic)
[ 3289.065435] MSR: 800000010280b033 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE,TM[E]>
CR: 24082822 XER: 20000000
[ 3289.065446] CFAR: c000000000008750 DAR: c0000404565d6a00 DSISR: 40000000
SOFTE: 0
GPR00: c0000000002e7718 c00000044d4176f0 c0000000014a6600
c00000047e01f480
GPR04: 0000000000000010 0000000082000075 0000000000000075
0000000000000001
GPR08: 0000000002000000 0000000000000000 0000000082000075
0000000000000009
GPR12: 0000000084002828 c000000007b4e200 0000000000000000
0000000000000000
GPR16: 0000000000000000 0000000000000000 0000000000000000
c000000000d7a800
GPR20: 0000000010000050 c000000000fd4e6c c0000003e7933840
c0000000014daae0
GPR24: c00000000138dc48 0000000000000000 0000000000000001
c00000047e00fe80
GPR28: c0000404565d6a00 c00000047e01f480 c0000004565de700
f000000001159740
[ 3289.065486] NIP [c0000000002e6eec] deactivate_slab+0x18c/0x640
[ 3289.065489] LR [c0000000002e7718] slab_cpuup_callback+0xe8/0x170
[ 3289.065491] Call Trace:
[ 3289.065493] [c00000044d4176f0] [c0000000002e715c]
deactivate_slab+0x3fc/0x640 (unreliable)
[ 3289.065498] [c00000044d417810] [c0000000002e7718]
slab_cpuup_callback+0xe8/0x170
[ 3289.065502] [c00000044d417880] [c0000000000f98c8]
notifier_call_chain+0x98/0x110
[ 3289.065506] [c00000044d4178d0] [c0000000000ca564] __cpu_notify+0x54/0xa0
[ 3289.065509] [c00000044d4178f0] [c0000000000ca77c] cpu_notify_nofail+0x2c/0x40
[ 3289.065512] [c00000044d417910] [c0000000000ca7e4] notify_dead+0x54/0x170
[ 3289.065515] [c00000044d4179b0] [c0000000000c98c4]
cpuhp_invoke_callback+0x84/0x250
[ 3289.065519] [c00000044d417a10] [c0000000000c9bfc]
cpuhp_down_callbacks+0x8c/0x110
[ 3289.065523] [c00000044d417a60] [c00000000024e328] _cpu_down+0x168/0x2b0
[ 3289.065526] [c00000044d417ac0] [c0000000000cc068] do_cpu_down+0x68/0xb0
[ 3289.065530] [c00000044d417b00] [c000000000738448]
cpu_subsys_offline+0x28/0x40
[ 3289.065534] [c00000044d417b20] [c00000000072f9e4] device_offline+0x104/0x140
[ 3289.065538] [c00000044d417b60] [c00000000009a7bc]
dlpar_cpu_remove+0x24c/0x350
[ 3289.065542] [c00000044d417c40] [c00000000009aa50] dlpar_cpu_release+0x70/0xe0
[ 3289.065545] [c00000044d417c90] [c000000000021a04] arch_cpu_release+0x44/0x80
[ 3289.065548] [c00000044d417cb0] [c000000000738c8c] cpu_release_store+0x4c/0x80
[ 3289.065552] [c00000044d417ce0] [c00000000072b7b0] dev_attr_store+0x40/0x70
[ 3289.065555] [c00000044d417d00] [c0000000003e1e1c] sysfs_kf_write+0x6c/0xa0
[ 3289.065559] [c00000044d417d20] [c0000000003e0cdc]
kernfs_fop_write+0x17c/0x250
[ 3289.065563] [c00000044d417d70] [c000000000322b20] __vfs_write+0x40/0x80
[ 3289.065566] [c00000044d417d90] [c000000000323ec4] vfs_write+0xd4/0x270
[ 3289.065571] [c00000044d417de0] [c000000000325acc] SyS_write+0x6c/0x110
[ 3289.065575] [c00000044d417e30] [c000000000009584] system_call+0x38/0xec
[ 3289.065577] Instruction dump:
[ 3289.065579] b0df0018 60420000 815f0018 55490bfe 5529f83e 7d294378 913f0018
7c2004ac
[ 3289.065585] e93f0000 792907a4 f93f0000 e93d0022 <7d5c482a> 2faa0000 419e0064
7f86e378
[ 3289.065596] ---[ end trace 7f6da25673d4d05e ]---
Oops output:
Oops: Kernel access of bad area, sig: 11 [#1]
== Comment: #12 - Ping Tian Han <pt...@cn.ibm.com> - 2017-01-17 20:57:37 ==
Looks like this bug can be reproduced without the CadetE card. I think the
problem occurs on the BabyBlueTip card:
0292:60:00.0 Ethernet controller: Mellanox Technologies MT27520 Family
[ConnectX-3 Pro]
Subsystem: IBM MT27520 Family [ConnectX-3 Pro]
Kernel driver in use: mlx4_core
Kernel modules: mlx4_core
== Comment: #14 - Carol L. Soto <cls...@us.ibm.com> - 2017-01-19 10:39:38 ==
I can not see in the report the stack trace this bugzilla is complaining.
but in the report I saw the known issue that when u did this dlpar with memory
and cpu and mellanox cards the card hits eeh. I think that was kernel issue.
You can try to recreate what this bugzilla complains with dlpar of the
IO card but the test that you are running will hit the known issue I
explained.
== Comment: #15 - Ping Tian Han <pt...@cn.ibm.com> - 2017-01-19 19:12:47 ==
(In reply to comment #14)
> I can not see in the report the stack trace this bugzilla is complaining.
> but in the report I saw the known issue that when u did this dlpar with
> memory and cpu and mellanox cards the card hits eeh. I think that was kernel
> issue.
>
> You can try to recreate what this bugzilla complains with dlpar of the IO
> card but the test that you are running will hit the known issue I explained.
Thanks. Looks like this is a mellanox card issue.
Mirroring the bug to Canonical for their awareness.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Taco Screen team (taco-screen-team)
Status: New
** Tags: architecture-ppc64le bugnameltc-150353 severity-high
targetmilestone-inin---
--
ubuntu 16.04.2: crashed at deactivate_slab+0x18c/0x640 when testing dlpar
https://bugs.launchpad.net/bugs/1658968
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