@IBM, do the patches that were included in the PPA in comment #14 completely address a discrete issue? Or do we need to wait for further patches to be identified and upstreamed?
If the patches included in the PPA from comment #14 do address a concrete issue, then I would suggest re-focusing this bug on that issue, and raising a new bug for the other issues... -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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: In Progress Status in linux source package in Bionic: In Progress 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 == To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1752002/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
