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[Po-Hsu Lin <2042388@xxxxxxxxxxxxxxxxxx>]

Hi Emil,
I just give your test kernel a try, it looks like it can solve the issue! Thanks!

$ sudo ./stress-ng -v -t 5 --context 4 --context-ops 3000 --ignite-cpu --syslog --verbose --verify --oomable
stress-ng: debug: [1163] invoked with './stress-ng -v -t 5 --context 4 --context-ops 3000 --ignite-cpu --syslog --verbose --verify --oomable' by user 0 'root'
stress-ng: debug: [1163] stress-ng 0.17.00 gb5f33cfd1d9d
stress-ng: debug: [1163] system: Linux riscv64-mantic 6.5.0-9-generic #9.2 SMP Thu Nov  2 16:20:40 UTC 2023 riscv64, gcc 13.2.0, glibc 2.38
stress-ng: debug: [1163] RAM total: 7.7G, RAM free: 7.2G, swap free: 0.0
stress-ng: debug: [1163] temporary file path: '/home/ubuntu/autotest/client/tmp/ubuntu_stress_smoke_test/src/stress-ng', filesystem type: ext2 (1505198 blocks available)
stress-ng: debug: [1163] 8 processors online, 8 processors configured
stress-ng: info:  [1163] setting to a 5 secs run per stressor
stress-ng: debug: [1163] cache allocate: using defaults, cannot determine cache level details
stress-ng: debug: [1163] cache allocate: shared cache buffer size: 2048K
stress-ng: info:  [1163] dispatching hogs: 4 context
stress-ng: debug: [1163] starting stressors
stress-ng: debug: [1163] 4 stressors started
stress-ng: debug: [1164] context: [1164] started (instance 0 on CPU 7)
stress-ng: debug: [1165] context: [1165] started (instance 1 on CPU 5)
stress-ng: debug: [1166] context: [1166] started (instance 2 on CPU 0)
stress-ng: debug: [1167] context: [1167] started (instance 3 on CPU 2)
stress-ng: debug: [1165] context: [1165] exited (instance 1 on CPU 5)
stress-ng: debug: [1164] context: [1164] exited (instance 0 on CPU 7)
stress-ng: debug: [1166] context: [1166] exited (instance 2 on CPU 0)
stress-ng: debug: [1163] context: [1164] terminated (success)
stress-ng: debug: [1167] context: [1167] exited (instance 3 on CPU 2)
stress-ng: debug: [1163] context: [1165] terminated (success)
stress-ng: debug: [1163] context: [1166] terminated (success)
stress-ng: debug: [1163] context: [1167] terminated (success)
stress-ng: debug: [1163] metrics-check: all stressor metrics validated and sane
stress-ng: info:  [1163] skipped: 0
stress-ng: info:  [1163] passed: 4: context (4)
stress-ng: info:  [1163] failed: 0
stress-ng: info:  [1163] metrics untrustworthy: 0
stress-ng: info:  [1163] successful run completed in 5.05 secs
$ echo $?
0
$ uname -a
Linux riscv64-mantic 6.5.0-9-generic #9.2 SMP Thu Nov  2 16:20:40 UTC 2023 riscv64 riscv64 riscv64 GNU/Linux

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https://bugs.launchpad.net/bugs/2042388

Title:
  context test in ubuntu_stress_smoke_test failed with M-6.5 riscv /
  starfive instances

Status in ubuntu-kernel-tests:
  New
Status in glibc package in Ubuntu:
  Invalid
Status in glibc source package in Mantic:
  New

Bug description:
  This issue can be found from the very beginning of these two kernels
  * mantic/linux-starfive/6.5.0-1001.2
  * mantic/linux-riscv/6.5.0-7.7.2

  Test failed with:
   context STARTING
   context RETURNED 2
   context FAILED
   stress-ng: debug: [12644] invoked with './stress-ng -v -t 5 --context 4 --context-ops 3000 --ignite-cpu --syslog --verbose --verify --oomable' by user 0 'root'
   stress-ng: debug: [12644] stress-ng 0.16.05 gaea6f3306f46
   stress-ng: debug: [12644] system: Linux mantic-starfive-riscv64 6.5.0-1001-starfive #2-Ubuntu SMP Fri Oct  6 12:08:59 UTC 2023 riscv64, gcc 13.2.0, glibc 2.38
   stress-ng: debug: [12644] RAM total: 7.7G, RAM free: 6.6G, swap free: 1024.0M
   stress-ng: debug: [12644] temporary file path: '/home/ubuntu/autotest/client/tmp/ubuntu_stress_smoke_test/src/stress-ng', filesystem type: ext2 (4617314 blocks available)
   stress-ng: debug: [12644] 8 processors online, 8 processors configured
   stress-ng: info:  [12644] setting to a 5 secs run per stressor 
   stress-ng: debug: [12644] cache allocate: using defaults, cannot determine cache level details
   stress-ng: debug: [12644] cache allocate: shared cache buffer size: 2048K
   stress-ng: info:  [12644] dispatching hogs: 4 context
   stress-ng: debug: [12644] starting stressors
   stress-ng: debug: [12644] 4 stressors started
   stress-ng: debug: [12645] context: [12645] started (instance 0 on CPU 2)
   stress-ng: debug: [12647] context: [12647] started (instance 2 on CPU 5)
   stress-ng: debug: [12648] context: [12648] started (instance 3 on CPU 7)
   stress-ng: debug: [12646] context: [12646] started (instance 1 on CPU 4)
   stress-ng: debug: [12644] context: [12645] terminated on signal: 11 (Segmentation fault)
   stress-ng: debug: [12644] context: [12645] terminated (success)
   stress-ng: debug: [12644] context: [12646] terminated on signal: 11 (Segmentation fault)
   stress-ng: debug: [12644] context: [12646] terminated (success)
   stress-ng: debug: [12644] context: [12647] terminated on signal: 11 (Segmentation fault)
   stress-ng: debug: [12644] context: [12647] terminated (success)
   stress-ng: debug: [12644] context: [12648] terminated on signal: 11 (Segmentation fault)
   stress-ng: debug: [12644] context: [12648] terminated (success)
   stress-ng: warn:  [12644] metrics-check: all bogo-op counters are zero, data may be incorrect
   stress-ng: debug: [12644] metrics-check: all stressor metrics validated and sane 
   stress-ng: info:  [12644] skipped: 0
   stress-ng: info:  [12644] passed: 4: context (4)
   stress-ng: info:  [12644] failed: 0
   stress-ng: info:  [12644] metrics untrustworthy: 0 
   stress-ng: info:  [12644] unsuccessful run completed in 9.98 secs

  Looks like the tests have passed. But marked as failed with a non-zero
  return code.

  Tested with stress-ng V0.16.05 and V0.17.00, they all failed with the
  same issue.

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