Comment 17 for bug 1628976

------- Comment From <email address hidden> 2016-10-19 08:37 EDT-------
Hi,

Tested with "4.8.0-25-generic" kernel from -proposed. Issue reported in bug is not observed, memory_stress_ng test got completed and system was up and running.

But got below call trace while running mlock test [ not consistent ] . Attaching logs.

[ 5230.664871] Oops: Unrecoverable exception, sig: 6 [#1]
[ 5230.664874] SMP NR_CPUS=2048 NUMA pSeries
[ 5230.664878] Modules linked in: pseries_rng vmx_crypto ip_tables x_tables autofs4 ibmvscsi lpfc crc32c_vpmsum scsi_transport_fc
[ 5230.664889] CPU: 8 PID: 5499 Comm: stress-ng-mlock Not tainted 4.8.0-25-generic #27-Ubuntu
[ 5230.664893] task: c0000001b018c600 task.stack: c0000001ab288000
[ 5230.664895] NIP: c000000000009c64 LR: c000000000028d30 CTR: 0000000000000001
[ 5230.664899] REGS: c0000001ab28b9c0 TRAP: 0700 Not tainted (4.8.0-25-generic)
[ 5230.664901] MSR: 8000000302a03031 <SF,VEC,VSX,FP,ME,IR,DR,LE,TM[SE]> CR: 44002428 XER: 20000000
[ 5230.664913] CFAR: c000000000009c30 SOFTE: 1
PACATMSCRATCH: 800000010280b033
GPR00: c000000000028d30 c0000001ab28bc40 c000000001476700 00003fffd12d2b38
GPR04: 0000000000001000 00003fffd12d1dc0 0000000000000000 c0000001b018d560
GPR08: 00003fff9deffb10 0000000000000000 0000000000000000 000c000000000000
GPR12: c0000001b018d110 c00000000fb84800 00000000000186a0 00003fffd12d34a8
GPR16: 00003fffd12d34a3 ffffffffffffffff ffffffffffffffff 0000000000000001
GPR20: 0000000000000000 000000002b168160 00003fff9c010010 000000002b1681a8
GPR24: 0000000000000000 c0000001b018cdd0 0000000000000005 00003fffd12d2b28
GPR28: c0000001ab28bd30 c0000001ab28bea0 0000000000000000 00003fffd12d1dc0
[ 5230.664961] NIP [c000000000009c64] fast_exception_return+0x94/0x9c
[ 5230.664965] LR [c000000000028d30] handle_rt_signal64+0x80/0x790
[ 5230.664967] Call Trace:
[ 5230.664970] [c0000001ab28bc40] [c000000000028d18] handle_rt_signal64+0x68/0x790 (unreliable)
[ 5230.664978] [c0000001ab28bd10] [c00000000001b6d0] do_signal+0x1e0/0x2b0
[ 5230.664982] [c0000001ab28be00] [c00000000001b928] do_notify_resume+0xb8/0xd0
[ 5230.664986] [c0000001ab28be30] [c000000000009b44] ret_from_except_lite+0x70/0x74
[ 5230.664989] Instruction dump:
[ 5230.664992] 7c40e3a6 e9a100d8 7c7b03a6 e84101a0 7c4ff120 e8410170 7c5a03a6 e8010070
[ 5230.664999] e8410080 e8610088 e8810090 e8210078 <4c000024> 48000000 e8610178 88ed023b
[ 5230.665008] ---[ end trace 9f6fd8e3b185bfb5 ]---
[ 5230.697553]
[ 5235.381161] systemd-journald[603]: /dev/kmsg buffer overrun, some messages lost.
stress-ng: info: [5310] unsuccessful run completed in 307.27s (5 mins, 7.27 secs)
return_code is 2
*****************************************************************
** Error 2 reported on stressor mlock!)
*****************************************************************

Thanks,
Pavithra