I applied the suggested patch to our systemd as well. We were hit badly by this bug, about 400 systems are generating these messages and spam logs (actually only just a few we upgraded from sysvinit to systemd, we stopped the process due to this).
After applying the patch, systemd does not produce these "Looping too fast" messages at the original scale anymore. However, there are still several such messages being generated at bootup: ... Jun 08 13:43:47 f0046-pushkino.rgs-podm.ru systemd[1]: Starting Update UTMP about System Runlevel Changes... Jun 08 13:43:47 f0046-pushkino.rgs-podm.ru systemd[1]: Started Update UTMP about System Runlevel Changes. Jun 08 13:43:47 f0046-pushkino.rgs-podm.ru systemd[1]: Startup finished in 2.929s (kernel) + 28.032s (userspace) = 30.962s. Jun 08 13:43:57 f0046-pushkino.rgs-podm.ru systemd[1]: Looping too fast. Throttling execution a little. Jun 08 13:43:58 f0046-pushkino.rgs-podm.ru systemd[1]: Looping too fast. Throttling execution a little. Jun 08 13:43:59 f0046-pushkino.rgs-podm.ru systemd[1]: Looping too fast. Throttling execution a little. Jun 08 13:44:01 f0046-pushkino.rgs-podm.ru systemd[1]: Looping too fast. Throttling execution a little. Jun 08 13:44:54 f0046-pushkino.rgs-podm.ru ntpd_intres[2240]: DNS ntp.msk.rgs-podm.ru -> 10.77.7.90 Jun 08 13:48:12 f0046-pushkino.rgs-podm.ru systemd[1]: Time has been changed ... I don't know how problematic it is. Thanks, /mjt
