This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 2024599
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Changed in: linux (Ubuntu Jammy)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/2024599
Title:
linux-image-5.15.0-1032-realtime locks up under scheduler test load
Status in linux package in Ubuntu:
Incomplete
Status in linux source package in Jammy:
Incomplete
Bug description:
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 22.04.2 LTS
Release: 22.04
Codename: jammy
uname -a
Linux jammie-amd64-efi 5.15.0-1032-realtime #35-Ubuntu SMP PREEMPT_RT Tue Jan
24 11:45:03 UTC 2023 x86_64
x86_64 x86_64 GNU/Linux
free
total used free shared buff/cache
available
Mem: 4013888 200984 3439012 1204 373892
3744628
Swap: 4014076 0 4014076
Running in a kvm-qemu, 8 cpus, cpu Intel Core Processor (Skylake,
IBRS):
how to reproduce issue:
git clone https://github.com/ColinIanKing/stress-ng
sudo apt-get update
sudo apt-get build-dep stress-ng
sudo apt-get install libeigen3-dev libmpfr-dev libkmod-dev libxxhash-dev
libglvnd-dev libgbm-dev
cd stress-ng
make clean
make -j 8
sudo ./stress-ng --class scheduler --all 1 -v --vmstat 1 -t 30m
..wait for all the stressors to get invoked, system becomes
unresponsive, can't ^C stress-ng, can't swap consoles on the VM,
appears to be hard locked.
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