** Package changed: kernel-package (Ubuntu) => linux (Ubuntu)
** Also affects: ubuntu-power-systems
Importance: Undecided
Status: New
** Changed in: ubuntu-power-systems
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1752002
Title:
[P9,POwer NV][WSP][DD2.1][Ubuntu 1804][Perf fuzzer] : Call trace is
seen while running perf fuzzer (perf:)
Status in The Ubuntu-power-systems project:
Incomplete
Status in linux package in Ubuntu:
New
Bug description:
== Comment: #0 - Shriya R. Kulkarni <shriy...@in.ibm.com> - 2018-02-02
01:21:36 ==
Problem Description :
=============
Warn on message is seen while running perf fuzzer tests.
Machine details :
==========
Hardware : Witherspoon (wsp12) + DD2.1
OS : Ubuntu 1804
uname -a : 4.13.0-32-generic #35~lp1746225 ( Kernel from the bug :
https://bugzilla.linux.ibm.com/show_bug.cgi?id=164107#c7 )
Steps to reproduce :
============
Build Kernel :
--------------------
To avoid the kernel crash due to Perf fuzzer , use the kernel mentioned in
the link : https://bugzilla.linux.ibm.com/show_bug.cgi?id=164107#c7
#! /bin/bash
set -x
git clone https://github.com/deater/perf_event_tests.git
cd perf_event_tests/include
mkdir asm
cd asm
wget http://9.114.13.132/repo/shriya/perf_regs.h
cd ../../lib
make
sleep 10
cd ../fuzzer
make
sleep 10
echo 0 > /proc/sys/kernel/nmi_watchdog
echo 2 > /proc/sys/kernel/perf_event_paranoid
echo 100000 > /proc/sys/kernel/perf_event_max_sample_rate
./perf_fuzzer -r 1492143527
Call trace :
=======
[ 329.228031] ------------[ cut here ]------------
[ 329.228039] WARNING: CPU: 43 PID: 9088 at
/home/jsalisbury/bugs/lp1746225/ubuntu-artful/kernel/events/core.c:3038
perf_pmu_sched_task+0x170/0x180
[ 329.228040] Modules linked in: ofpart at24 uio_pdrv_genirq uio cmdlinepart
powernv_flash mtd ipmi_powernv vmx_crypto ipmi_devintf ipmi_msghandler
ibmpowernv opal_prd crct10dif_vpmsum sch_fq_codel ip_tables x_tables autofs4
crc32c_vpmsum lpfc ast i2c_algo_bit drm_kms_helper syscopyarea sysfillrect
sysimgblt mlx5_core fb_sys_fops ttm tg3 nvmet_fc drm ahci nvmet nvme_fc libahci
nvme_fabrics mlxfw nvme_core devlink scsi_transport_fc
[ 329.228068] CPU: 43 PID: 9088 Comm: perf_fuzzer Not tainted
4.13.0-32-generic #35~lp1746225
[ 329.228070] task: c000003f776ac900 task.stack: c000003f77728000
[ 329.228071] NIP: c000000000299b70 LR: c0000000002a4534 CTR:
c00000000029bb80
[ 329.228073] REGS: c000003f7772b760 TRAP: 0700 Not tainted
(4.13.0-32-generic)
[ 329.228073] MSR: 900000000282b033 <SF,HV,VEC,VSX,EE,FP,ME,IR,DR,RI,LE>
[ 329.228079] CR: 24008822 XER: 00000000
[ 329.228080] CFAR: c000000000299a70 SOFTE: 0
GPR00: c0000000002a4534 c000003f7772b9e0 c000000001606200
c000003fef858908
GPR04: c000003f776ac900 0000000000000001 ffffffffffffffff
0000003fee730000
GPR08: 0000000000000000 0000000000000000 c0000000011220d8
0000000000000002
GPR12: c00000000029bb80 c000000007a3d900 0000000000000000
0000000000000000
GPR16: 0000000000000000 0000000000000000 0000000000000000
0000000000000000
GPR20: 0000000000000000 0000000000000000 c000003f776ad090
c000000000c71354
GPR24: c000003fef716780 0000003fee730000 c000003fe69d4200
c000003f776ad330
GPR28: c0000000011220d8 0000000000000001 c0000000014c6108
c000003fef858900
[ 329.228098] NIP [c000000000299b70] perf_pmu_sched_task+0x170/0x180
[ 329.228100] LR [c0000000002a4534] __perf_event_task_sched_in+0xc4/0x230
[ 329.228101] Call Trace:
[ 329.228102] [c000003f7772b9e0] [c0000000002a0678]
perf_iterate_sb+0x158/0x2a0 (unreliable)
[ 329.228105] [c000003f7772ba30] [c0000000002a4534]
__perf_event_task_sched_in+0xc4/0x230
[ 329.228107] [c000003f7772bab0] [c0000000001396dc]
finish_task_switch+0x21c/0x310
[ 329.228109] [c000003f7772bb60] [c000000000c71354] __schedule+0x304/0xb80
[ 329.228111] [c000003f7772bc40] [c000000000c71c10] schedule+0x40/0xc0
[ 329.228113] [c000003f7772bc60] [c0000000001033f4] do_wait+0x254/0x2e0
[ 329.228115] [c000003f7772bcd0] [c000000000104ac0] kernel_wait4+0xa0/0x1a0
[ 329.228117] [c000003f7772bd70] [c000000000104c24] SyS_wait4+0x64/0xc0
[ 329.228121] [c000003f7772be30] [c00000000000b184] system_call+0x58/0x6c
[ 329.228121] Instruction dump:
[ 329.228123] 3beafea0 7faa4800 409eff18 e8010060 eb610028 ebc10040 7c0803a6
38210050
[ 329.228127] eb81ffe0 eba1ffe8 ebe1fff8 4e800020 <0fe00000> 4bffffbc
60000000 60420000
[ 329.228131] ---[ end trace 8c46856d314c1811 ]---
[ 375.755943] hrtimer: interrupt took 31601 ns
== Comment: #4 - SEETEENA THOUFEEK <sthou...@in.ibm.com> - 2018-02-05
06:34:09 ==
== Comment: #5 - SEETEENA THOUFEEK <sthou...@in.ibm.com> - 2018-02-05
06:36:12 ==
We have similar issue reported on different distro where Anju Provided the
patch. Patch attached above.
.
Will check with her if that patch got accepted upstream
== Comment: #14 - SEETEENA THOUFEEK <sthou...@in.ibm.com> - 2018-02-23
01:52:50 ==
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