[systemd-bugs] [Bug 87570] New: Real time priority broken with systemd 218

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87570

            Bug ID: 87570
           Summary: Real time priority broken with systemd 218
           Product: systemd
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: general
          Assignee: systemd-bugs at lists.freedesktop.org
          Reporter: adriano.lols at gmail.com
        QA Contact: systemd-bugs at lists.freedesktop.org

Can't elevate process scheduling from normal to real time (fifo), neither as a
normal user or root. It's a fully updated archlinux system with the just
released systemd 218.

Steps to reproduce:
Look for this rtkit-daemon log output, when it starts:
rtkit-daemon[10832]: Successfully called chroot.
rtkit-daemon[10832]: Successfully dropped privileges.
rtkit-daemon[10832]: Successfully limited resources.
rtkit-daemon[10832]: Running.
rtkit-daemon[10832]: Canary thread running.
rtkit-daemon[10832]: Failed to make ourselves RT: Operation not permitted
rtkit-daemon[10832]: Watchdog thread running.

downgrade to systemd 217
notice that rtkit-daemon does not outputs "Failed to make ourselves RT:
Operation not permitted" anymore and any process that request real time
scheduling (like jack) will now work properly.

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