[linus:master] [block] 245618f8e4: stress-ng.fpunch.fail

[kernel test robot <oliver.sang@intel.com>]

Hello,


we don't have enough knowledge if this is a kernel issue or test case issue.

=========================================================================================
tbox_group/testcase/rootfs/kconfig/compiler/nr_threads/disk/testtime/fs/test/cpufreq_governor:
  lkp-icl-2sp4/stress-ng/debian-12-x86_64-20240206.cgz/x86_64-rhel-9.4/gcc-12/100%/1HDD/60s/xfs/fpunch/performance

3efe7571c3ae2b64 245618f8e45ff4f79327627b474
---------------- ---------------------------
       fail:runs  %reproduction    fail:runs
           |             |             |
           :6          100%           6:6     stress-ng.fpunch.fail

since the failure is persistent, just report what we observed in our tests FYI.


kernel test robot noticed "stress-ng.fpunch.fail" on:

commit: 245618f8e45ff4f79327627b474b563da71c2c75 ("block: protect wbt_lat_usec using q->elevator_lock")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

[test failed on linus/master      b36ddb9210e6812eb1c86ad46b66cc46aa193487]
[test failed on linux-next/master 8566fc3b96539e3235909d6bdda198e1282beaed]
[test failed on fix commit        9730763f4756e32520cb86778331465e8d063a8f]

in testcase: stress-ng
version: stress-ng-x86_64-1c71921fd-1_20250212
with following parameters:

	nr_threads: 100%
	disk: 1HDD
	testtime: 60s
	fs: xfs
	test: fpunch
	cpufreq_governor: performance



config: x86_64-rhel-9.4
compiler: gcc-12
test machine: 128 threads 2 sockets Intel(R) Xeon(R) Platinum 8358 CPU @ 2.60GHz (Ice Lake) with 128G memory

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


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@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202505221030.760980df-lkp@intel.com

2025-03-20 08:33:52 mkdir -p /mnt/stress-ng
2025-03-20 08:33:52 mount /dev/sdc1 /mnt/stress-ng
2025-03-20 08:33:52 cd /mnt/stress-ng
  File: "/mnt/stress-ng"
    ID: 82100000000 Namelen: 255     Type: xfs
Block size: 4096       Fundamental block size: 4096
Blocks: Total: 78604800   Free: 78518242   Available: 78518242
Inodes: Total: 157286400  Free: 157286397
2025-03-20 08:33:52 stress-ng --timeout 60 --times --verify --metrics --no-rand-seed --fpunch 128
stress-ng: info:  [4680] setting to a 1 min run per stressor
stress-ng: info:  [4680] dispatching hogs: 128 fpunch
stress-ng: info:  [4680] note: /proc/sys/kernel/sched_autogroup_enabled is 1 and this can impact scheduling throughput for processes not attached to a tty. Setting this to 0 may improve performance metrics
stress-ng: warn:  [4680] metrics-check: all bogo-op counters are zero, data may be incorrect
stress-ng: metrc: [4680] stressor       bogo ops real time  usr time  sys time   bogo ops/s     bogo ops/s CPU used per       RSS Max
stress-ng: metrc: [4680]                           (secs)    (secs)    (secs)   (real time) (usr+sys time) instance (%)          (KB)
stress-ng: metrc: [4680] fpunch                0    557.92      0.40     19.56         0.00           0.00         0.03          3180
stress-ng: metrc: [4680] miscellaneous metrics:
stress-ng: metrc: [4680] fpunch              2049.12 extents per file (geometric mean of 128 instances)
stress-ng: info:  [4680] for a 620.45s run time:
stress-ng: info:  [4680]   79418.05s available CPU time
stress-ng: info:  [4680]       0.40s user time   (  0.00%)
stress-ng: info:  [4680]      19.59s system time (  0.02%)
stress-ng: info:  [4680]      19.99s total time  (  0.03%)
stress-ng: info:  [4680] load average: 250.69 349.62 213.80
stress-ng: info:  [4680] skipped: 0
stress-ng: info:  [4680] passed: 128: fpunch (128)
stress-ng: info:  [4680] failed: 0
stress-ng: info:  [4680] metrics untrustworthy: 0
stress-ng: info:  [4680] successful run completed in 10 mins, 20.45 secs


we don't observe any abnormal output in dmesg. below is an example from parent
commit.

2025-03-20 09:12:39 mkdir -p /mnt/stress-ng
2025-03-20 09:12:39 mount /dev/sdc1 /mnt/stress-ng
2025-03-20 09:12:39 cd /mnt/stress-ng
  File: "/mnt/stress-ng"
    ID: 82100000000 Namelen: 255     Type: xfs
Block size: 4096       Fundamental block size: 4096
Blocks: Total: 78604800   Free: 78518242   Available: 78518242
Inodes: Total: 157286400  Free: 157286397
2025-03-20 09:12:39 stress-ng --timeout 60 --times --verify --metrics --no-rand-seed --fpunch 128
stress-ng: info:  [4689] setting to a 1 min run per stressor
stress-ng: info:  [4689] dispatching hogs: 128 fpunch
stress-ng: info:  [4689] note: /proc/sys/kernel/sched_autogroup_enabled is 1 and this can impact scheduling throughput for processes not attached to a tty. Setting this to 0 may improve performance metrics
stress-ng: metrc: [4689] stressor       bogo ops real time  usr time  sys time   bogo ops/s     bogo ops/s CPU used per       RSS Max
stress-ng: metrc: [4689]                           (secs)    (secs)    (secs)   (real time) (usr+sys time) instance (%)          (KB)
stress-ng: metrc: [4689] fpunch             1166     60.31      0.11     34.66        19.33          33.54         0.45          3164
stress-ng: metrc: [4689] miscellaneous metrics:
stress-ng: metrc: [4689] fpunch              2051.97 extents per file (geometric mean of 128 instances)
stress-ng: info:  [4689] for a 60.91s run time:
stress-ng: info:  [4689]    7796.93s available CPU time
stress-ng: info:  [4689]       0.11s user time   (  0.00%)
stress-ng: info:  [4689]      34.68s system time (  0.44%)
stress-ng: info:  [4689]      34.79s total time  (  0.45%)
stress-ng: info:  [4689] load average: 325.78 93.83 32.28
stress-ng: info:  [4689] skipped: 0
stress-ng: info:  [4689] passed: 128: fpunch (128)
stress-ng: info:  [4689] failed: 0
stress-ng: info:  [4689] metrics untrustworthy: 0
stress-ng: info:  [4689] successful run completed in 1 min


from above, parent can finish run in 1 min, then has "bogo ops" and "bogo ops/s"

for 245618f8e4, the test seems run much longer, and the results for "bogo ops"
and "bogo ops/s" are all 0.



The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20250522/202505221030.760980df-lkp@intel.com



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