Comment 0 for bug 1739498

== Comment: #0 - Breno Leitao - 2017-12-19 09:48:10 ==
When running Ubuntu 17.10 on POWER9, I got the following error:

[409038.118908] WARNING: CPU: 47 PID: 294 at /build/linux-LIHoWc/linux-4.13.0/mm/vmalloc.c:2527 pcpu_get_vm_areas+0x62c/0x660
[409038.118909] Modules linked in: xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack libcrc32c ipt_REJECT nf_reject_ipv4 xt_tcpudp bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter kvm_hv kvm at24 ofpart ipmi_powernv ipmi_devintf ipmi_msghandler cmdlinepart powernv_flash uio_pdrv_genirq uio mtd vmx_crypto ibmpowernv crct10dif_vpmsum opal_prd binfmt_misc ip_tables x_tables autofs4 crc32c_vpmsum ast i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm drm tg3 ahci libahci
[409038.118933] CPU: 47 PID: 294 Comm: kworker/47:0 Tainted: G W 4.13.0-12-generic #13-Ubuntu
[409038.118934] Workqueue: events pcpu_balance_workfn
[409038.118936] task: c000003fe3cdcc00 task.stack: c000003fe3be0000
[409038.118937] NIP: c00000000032c1fc LR: c0000000002f5fd4 CTR: 0000000000000000
[409038.118937] REGS: c000003fe3be3810 TRAP: 0700 Tainted: G W (4.13.0-12-generic)
[409038.118938] MSR: 900000000282b033 <SF,HV,VEC,VSX,EE,FP,ME,IR,DR,RI,LE>
[409038.118944] CR: 24024828 XER: 20040000
[409038.118944] CFAR: c00000000032bdb8 SOFTE: 1
                GPR00: 000020000df00000 c000003fe3be3a90 c0000000015e3000 c000203fff6b6880
                GPR04: c000203fff223608 0000000000000008 c000203fff6b6888 0000000000000000
                GPR08: 000020000df00000 0000080000000000 0000000001600000 c000203fff6b6888
                GPR12: 0000000000000002 c00000000faded80 c000000000f6c050 c000003fe3be3bc0
                GPR16: 0000000000100000 0000000000000000 c00000000189daf8 c000203fff223608
                GPR20: 000020000f500000 c000203fff2235f8 c000203fff223600 0000000000000000
                GPR24: 0000000000000000 c000203fff6b6888 0000000000000001 000020000f500000
                GPR28: 0000000000000002 00000000000fffff d000080000000000 d000000000000000
[409038.118963] NIP [c00000000032c1fc] pcpu_get_vm_areas+0x62c/0x660
[409038.118964] LR [c0000000002f5fd4] pcpu_create_chunk+0xb4/0x1b0
[409038.118965] Call Trace:
[409038.118966] [c000003fe3be3a90] [c000003fe3be3ad0] 0xc000003fe3be3ad0 (unreliable)
[409038.118968] [c000003fe3be3b60] [c0000000002f5fd4] pcpu_create_chunk+0xb4/0x1b0
[409038.118970] [c000003fe3be3ba0] [c0000000002f7890] pcpu_balance_workfn+0x600/0x960
[409038.118972] [c000003fe3be3ca0] [c0000000001205d8] process_one_work+0x298/0x5a0
[409038.118975] [c000003fe3be3d30] [c000000000120968] worker_thread+0x88/0x620
[409038.118977] [c000003fe3be3dc0] [c00000000012980c] kthread+0x1ac/0x1c0
[409038.118979] [c000003fe3be3e30] [c00000000000b4e8] ret_from_kernel_thread+0x5c/0x74
[409038.118980] Instruction dump:
[409038.118981] eae30000 4191fad0 7ed3b378 e9210030 7efbbb78 7c791b78 3b400000 e9530000

---uname output---
4.13.0-12-generic

== Comment: #3 - ANEESH K. K V - 2017-12-20 05:59:13 ==
https://<email address hidden>

The above may be related?

Related discussions https://<email address hidden>

-aneesh

== Comment: #4 - Breno Leitao - 2017-12-20 09:48:07 ==
I just tested with kernel 4.15.0-041500rc4 and I didn't see a problem so far.