this affects jammy:linux-mtk-5.15-1034.40
http://test-results.kernel/d2024.08.12/jammy/linux-
mtk/5.15.0-1034.40/sru-mtk-testflinger-mtk-g1200.arm64-ubuntu_ltp-
log.html#cpuhotplug:cpuhotplug03-start
156254 cpuhotplug03 1 TINFO: Onlining CPU 1
156255 5 /bin/sh
/opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
156256 0 /bin/sh
/opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
156257 3 /bin/sh
/opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
156258 3 /bin/sh
/opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
156259 7 /bin/sh
/opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
156260 5 /bin/sh
/opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
156261 1 /bin/sh
/opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
156262 2 /bin/sh
/opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
156263 0 /bin/sh
/opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
156264 2 /bin/sh
/opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
156265 3 /bin/sh
/opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
156266 2 /bin/sh
/opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
156267 5 /bin/sh
/opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
156268 6 /bin/sh
/opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
156269 7 /bin/sh
/opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
156270 5 /bin/sh
/opt/ltp/testcases/bin/cpuhotplug_do_spin_loop
156271 cpuhotplug03 1 TFAIL: No
cpuhotplug_do_spin_loop processes found on CPU1
from the log, after waking up the cpu and 1 second sleep, the required
task is running on the cpu1 from the first time ps command, but could
not find the required task on the target cpu in the following second ps
command.
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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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