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[Bug 931964] systemd: BUG: soft lockup - CPU#0 stuck
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Thu, 11 Jun 2015 08:34:54 +0000
  • Message-id: <bug-931964-21960-GSV88OAL3q@http.bugzilla.suse.com/>
http://bugzilla.suse.com/show_bug.cgi?id=931964

--- Comment #19 from Thomas Blume <thomas.blume@xxxxxxxx> ---
(In reply to Roland Bernet from comment #16)
This time I managed to get also the output of systemctl status.
I'll attach the output and the information in /var/log/messages.

-->--
2015-06-11T01:57:58.295352+02:00 farm-ui kernel: [148728.688839] CPU: 4 PID:
14045 Comm: systemd Tainted: P O 3.11.10-29-default #1
--<--

pid 14045 is a user session:

-->--
user-1242.slice
Loaded: loaded
Active: active since Wed 2015-06-10 09:52:18 CEST; 16h ago
CGroup: /user.slice/user-1242.slice
└─user@1242.service
├─14045 /usr/lib/systemd/systemd --user
└─14046 (sd-pam)

Jun 10 09:52:18 farm-ui systemd[1]: Created slice user-1242.slice.
Jun 10 09:52:18 farm-ui systemd[14045]: pam_unix(systemd-user:session): session
opened for user ivanov by (uid=0)
Jun 10 09:52:18 farm-ui sshd[14047]: subsystem request for sftp by user ivanov
Jun 10 09:52:18 farm-ui systemd[14045]: Starting Default.
Jun 10 09:52:18 farm-ui systemd[14045]: Reached target Default.
Jun 10 09:52:18 farm-ui systemd[14045]: Startup finished in 75ms.
Jun 10 09:53:10 farm-ui sshd[14122]: subsystem request for sftp by user ivanov
Jun 10 09:56:53 farm-ui sshd[14032]: pam_unix(sshd:session): session closed for
user ivanov
Jun 10 09:58:11 farm-ui sshd[14122]: Received disconnect from 77.56.105.133:
11: disconnected by user
Jun 10 09:58:11 farm-ui sshd[14119]: pam_unix(sshd:session): session closed for
user ivanov
user-2089.slice -> '/org/freedesktop/systemd1/unit/user_2d2089_2eslice'
--<--

It takes more than 3 Minutes between the sftp request and the session end.
So, I guess the sftp process somehow triggered the lockup.

In the meantime I had also a soft lockup by a user program. It seems it's
not a systemd issue, systemd seems to trigger the bug just more likely than
any other command. The lockup happened at the same place in the kernel.

This is what I was expecting, thanks for the confirmation.
Ok, to make it a duplicate of bug 864430 then?

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