Comment 3 for bug 1968886

I gave it a try with the test kernel shared by Dimitri.

1. Launch a jammy(kernel version: 5.15.0-25-generic) based LXD VM locally
2. Disable the security boot.
3. Install the test kernels (version: 5.15.0-26-generic)
4. Reboot the VM
5. Install the latest lxd snap(5.0.0-e478009) from the store
6. Run the test plan
```
ubuntu@jammy-kernel-lp1968886:~$ sudo sysctl -a | grep pid_max
kernel.pid_max = 4194304
ubuntu@jammy-kernel-lp1968886:~$ lxc exec small-pid-container -- sysctl -a 2>/dev/null | grep pid_max
kernel.pid_max = 65536
```

The test results matched what we expected.