linux-kernel - [driver-core:pmu_bus] [perf/core] 8c8ac498a0: sysfs:cannot_create_duplicate

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Message-ID: <202502191352.b65c904c-lkp@intel.com>
Date: Wed, 19 Feb 2025 13:59:30 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <devel@...verdev.osuosl.org>,
	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim
	<namhyung@...nel.org>, Mark Rutland <mark.rutland@....com>, "Alexander
 Shishkin" <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>,
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>,
	"Liang, Kan" <kan.liang@...ux.intel.com>, <linux-kernel@...r.kernel.org>,
	<linux-perf-users@...r.kernel.org>, <oliver.sang@...el.com>
Subject: [driver-core:pmu_bus] [perf/core]  8c8ac498a0:
 sysfs:cannot_create_duplicate_filename



Hello,

kernel test robot noticed "sysfs:cannot_create_duplicate_filename" on:

commit: 8c8ac498a0c5d8e68247800639bfb554bb65c782 ("perf/core: move all of the pmu devices into their own location")
https://git.kernel.org/cgit/linux/kernel/git/gregkh/driver-core.git pmu_bus

in testcase: boot

config: x86_64-randconfig-071-20250217
compiler: gcc-12
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G

(please refer to attached dmesg/kmsg for entire log/backtrace)


+--------------------------------------------------------+------------+------------+
|                                                        | 5c96041392 | 8c8ac498a0 |
+--------------------------------------------------------+------------+------------+
| sysfs:cannot_create_duplicate_filename                 | 0          | 6          |
| WARNING:at_kernel/events/core.c:#perf_event_sysfs_init | 0          | 6          |
| RIP:perf_event_sysfs_init                              | 0          | 6          |
+--------------------------------------------------------+------------+------------+


If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@...el.com>
| Closes: https://lore.kernel.org/oe-lkp/202502191352.b65c904c-lkp@intel.com


[    9.537939][    T1] RAPL PMU: API unit is 2^-32 Joules, 0 fixed counters, 10737418240 ms ovfl timer
[    9.539489][    T1] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x2c9477ac655, max_idle_ns: 440795235027 ns
[    9.555343][    T1] AVX2 or AES-NI instructions are not detected.
[    9.557309][    T1] AES CTR mode by8 optimization enabled
[    9.558531][    T1] sm3_avx_x86_64: BMI2 instruction are not detected.
[    9.574389][    T1] sysfs: cannot create duplicate filename '/devices/pmu_bus/power'
[    9.575589][    T1] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.14.0-rc1-00002-g8c8ac498a0c5 #1 95963aaeb84018cf4204d4190168e0e20d73ea75
[    9.575599][    T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[    9.575602][    T1] Call Trace:
[    9.575604][    T1]  <TASK>
[ 9.575608][ T1] dump_stack_lvl (kbuild/src/consumer/lib/dump_stack.c:123) 
[ 9.575629][ T1] sysfs_warn_dup (kbuild/src/consumer/fs/sysfs/dir.c:32) 
[ 9.575636][ T1] sysfs_create_dir_ns (kbuild/src/consumer/fs/sysfs/dir.c:63) 
[ 9.575641][ T1] ? __pfx_sysfs_create_dir_ns (kbuild/src/consumer/fs/sysfs/dir.c:41) 


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20250219/202502191352.b65c904c-lkp@intel.com



-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki