[systemd-devel] systemd killing processes on monitor wakeup?

[Raman Gupta]

Does anyone have any tips for debugging this or getting more information?
Should I create an issue for this?

On Sun, Jan 23, 2022 at 3:43 PM Raman Gupta <rocketraman at gmail.com> wrote:

> (A variation of this message was originally sent to fedora-users)
>
> I have a couple processes that have been consistently dying every time I
> wake up my monitors after the system has been idle. One is Slack Desktop
> and the other is IntelliJ IDEA.
>
> I used an eBPF program (killsnoop.py at
> https://github.com/iovisor/bcc/blob/master/tools/killsnoop.py) to trace
> where the signal to shut down these processes was coming from, and it
> appears that systemd is sending pretty much every active process signal 15
> and then 18.
>
> TIME      PID    COMM             SIG  TPID   RESULT
> ... on monitor wakeup ...
> 12:16:58  2551   systemd          15   2938613 0
> 12:16:58  2551   systemd          18   2938613 0
> 12:16:58  2551   systemd          15   2938814 0
> 12:16:58  2551   systemd          18   2938814 0
> 12:16:58  2551   systemd          15   2938832 0
> 12:16:58  2551   systemd          18   2938832 0
> 12:16:58  2551   systemd          15   2938978 0
> 12:16:58  2551   systemd          18   2938978 0
> 12:16:58  2551   systemd          15   2939432 0
> 12:16:58  2551   systemd          18   2939432 0
> 12:16:58  2551   systemd          15   2939899 0
> 12:16:58  2551   systemd          18   2939899 0
> 12:16:58  2551   systemd          15   2942192 0
> 12:16:58  2551   systemd          18   2942192 0
> ...
>
> Process 2551 is the PDF of the source of the signal according to
> killsnoop, 15 and 18 are the signals being sent, and TPID is the target
> PID, which among many others, does include my dying processes. Process 2551
> is indeed systemd, specifically the user process:
>
> raman       2551       1  0 Jan07 ?        00:00:10
> /usr/lib/systemd/systemd --user
>
> This behavior is relatively new. What is going on here? I haven't found
> any other reports of this behavior anywhere else.
>
> I'm using systemd-249.9-1.fc35 on Fedora 35.
>
> Regards,
> Raman
>
>
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