canonical-ubuntu-qa team mailing list archive

[Cory Todd <1931390@xxxxxxxxxxxxxxxxxx>]

This affects jammy:linux-oracle-5.15-1040.46 for the 2023.07.10 cycle

The issue is a bit flaky, fails maybe 1/5 times.

** Tags added: sru-20230710

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https://bugs.launchpad.net/bugs/1931390

Title:
  cpuhotplug03 in cpuhotplug from ubuntu_ltp failed after successful
  CPU1 offline

Status in ubuntu-kernel-tests:
  New
Status in linux package in Ubuntu:
  Incomplete

Bug description:
  In cpuhotplug (ubuntu_ltp) tests, offline and online of CPU1 succeeds,
  but later the test fails with:

  utils:0153| [stdout] Name: cpuhotplug03
  utils:0153| [stdout] Date: Wed Jun 9 03:52:16 UTC 2021
  utils:0153| [stdout] Desc: Do tasks get scheduled to a newly on-lined CPU?
  utils:0153| [stdout]
  utils:0153| [stdout] CPU is 1
  utils:0153| [stdout] USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
  utils:0153| [stdout] root 858611 0.0 0.0 2616 540 ? R 03:52 0:00 /bin/sh /opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
  ...
  ...
  ...
  utils:0153| [stdout] 49 /bin/sh /opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
  utils:0153| [stdout] 82 /bin/sh /opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
  utils:0153| [stdout] 18 /bin/sh /opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
  utils:0153| [stdout] cpuhotplug03 1 TFAIL: No cpuhotplug_do_spin_loop processes found on CPU1
  utils:0153| [stdout] tag=cpuhotplug03 stime=1623210736 dur=3 exit=exited stat=1 core=no cu=22260 cs=78

  IMPORTANT: The CPU1 got properly offlined and onlined. For failures of
  CPU1 offline, please see lp:1836167 (reported previously as part of
  lp:1836167).

  Po-Hsu Lin (cypressyew) wrote on 2020-09-25:
  On F-oem-5.6 with node glameow:
  cpuhotplug03 1 TFAIL: No cpuhotplug_do_spin_loop processes found on CPU1

  Kelsey Skunberg (kelsey-skunberg) wrote on 2020-10-06:
  spotted on Focal aws : 5.4.0-1026.26 : amd64
  cpuhotplug03 1 TFAIL: No cpuhotplug_do_spin_loop processes found on CPU1

  Po-Hsu Lin (cypressyew) wrote on 2021-06-09:
  Found on 5.11.0-1005.5 - intel
  Node spitfire, passed on node bavor.
  cpuhotplug03 1 TFAIL: No cpuhotplug_do_spin_loop processes found on CPU1

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