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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-16 09:57:40 +07:00
7ccc4fe5ff
Call trace observed while running perf-fuzzer:
CPU: 43 PID: 9088 Comm: perf_fuzzer Not tainted 4.13.0-32-generic #35~lp1746225
task: c000003f776ac900 task.stack: c000003f77728000
NIP: c000000000299b70 LR: c0000000002a4534 CTR: c00000000029bb80
REGS: c000003f7772b760 TRAP: 0700 Not tainted (4.13.0-32-generic)
MSR: 900000000282b033 <SF,HV,VEC,VSX,EE,FP,ME,IR,DR,RI,LE>
CR: 24008822 XER: 00000000
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
NIP [c000000000299b70] perf_pmu_sched_task+0x170/0x180
LR [c0000000002a4534] __perf_event_task_sched_in+0xc4/0x230
Call Trace:
perf_iterate_sb+0x158/0x2a0 (unreliable)
__perf_event_task_sched_in+0xc4/0x230
finish_task_switch+0x21c/0x310
__schedule+0x304/0xb80
schedule+0x40/0xc0
do_wait+0x254/0x2e0
kernel_wait4+0xa0/0x1a0
SyS_wait4+0x64/0xc0
system_call+0x58/0x6c
Instruction dump:
3beafea0 7faa4800 409eff18 e8010060 eb610028 ebc10040 7c0803a6 38210050
eb81ffe0 eba1ffe8 ebe1fff8 4e800020 <0fe00000> 4bffffbc 60000000 60420000
---[ end trace 8c46856d314c1811 ]---
The context switch call-backs for thread-imc are defined in sched_task function.
So when thread-imc events are grouped with software pmu events,
perf_pmu_sched_task hits the WARN_ON_ONCE condition, since software PMUs are
assumed not to have a sched_task defined.
Patch to move the thread_imc enable/disable opal call back from sched_task to
event_[add/del] function
Fixes:
|
||
|---|---|---|
| .. | ||
| req-gen | ||
| 8xx-pmu.c | ||
| bhrb.S | ||
| callchain.c | ||
| core-book3s.c | ||
| core-fsl-emb.c | ||
| e500-pmu.c | ||
| e6500-pmu.c | ||
| hv-24x7-catalog.h | ||
| hv-24x7-domains.h | ||
| hv-24x7.c | ||
| hv-24x7.h | ||
| hv-common.c | ||
| hv-common.h | ||
| hv-gpci-requests.h | ||
| hv-gpci.c | ||
| hv-gpci.h | ||
| imc-pmu.c | ||
| isa207-common.c | ||
| isa207-common.h | ||
| Makefile | ||
| mpc7450-pmu.c | ||
| perf_regs.c | ||
| power5-pmu.c | ||
| power5+-pmu.c | ||
| power6-pmu.c | ||
| power7-events-list.h | ||
| power7-pmu.c | ||
| power8-events-list.h | ||
| power8-pmu.c | ||
| power9-events-list.h | ||
| power9-pmu.c | ||
| ppc970-pmu.c | ||