Linux mainline fork with MSM8998 patches | https://mainline.space | Currently supported devices:
OnePlus 5/5T, Xiaomi Mi 6, F(x)tec Pro¹ (2019 QX1000 model) & Sony Xperia XZ Premium (UNTESTED!)
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:
|
||
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.