Related to bnc#886599 and others. That is use the vhangup(8) tool
to explicit do a virtually hangup on the specified on the terminal
line to give e.g. the bash a few seconds to e.g. safe its history.

[crrodriguez@opensuse.org: Feb 2015
This a known kernel bug, no notification from the cgroup subsystem 
arrives and the processes in the "scope" units have 
to be SIGKILL'ed without delay in order not to hang shutdown
Status: fix not available as of Feb 16 2015 
track progress: https://bugzilla.redhat.com/show_bug.cgi?id=1141137
]

---
 units/getty@.service.m4        |    1 +
 units/serial-getty@.service.m4 |    1 +
 2 files changed, 2 insertions(+)
Index: systemd-221/units/getty@.service.m4
===================================================================
--- systemd-221.orig/units/getty@.service.m4
+++ systemd-221/units/getty@.service.m4
@@ -29,6 +29,7 @@ ConditionPathExists=/dev/tty0
 [Service]
 # the VT is cleared by TTYVTDisallocate
 ExecStart=-/sbin/agetty --noclear %I $TERM
+ExecStopPost=-/sbin/vhangup /dev/%I
 Type=idle
 Restart=always
 RestartSec=0
Index: systemd-221/units/serial-getty@.service.m4
===================================================================
--- systemd-221.orig/units/serial-getty@.service.m4
+++ systemd-221/units/serial-getty@.service.m4
@@ -24,6 +24,7 @@ IgnoreOnIsolate=yes
 
 [Service]
 ExecStart=-/sbin/agetty --keep-baud 115200,38400,9600 %I $TERM
+ExecStopPost=-/sbin/vhangup /dev/%I
 Type=idle
 Restart=always
 UtmpIdentifier=%I