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Disable the ratelimit of kdump service on hotplug events 

When doing cpu softplug via /sys

ie)
        echo 0 > /sys/devices/system/cpu/cpuX/online
        echo 1 > /sys/devices/system/cpu/cpuX/online

the kdump service is restarted on every cpu up and down.  Eventually the
service stops because it is rate limited by systemd.

[root@dhg3 hoemann]# systemctl status kdump
kdump.service - Crash recovery kernel arming
   Loaded: loaded (/usr/lib/systemd/system/kdump.service; enabled)
   Active: failed (Result: start-limit) since Tue 2014-04-22 17:02:56 MDT; 59min ago
  Process: 8803 ExecStop=/usr/bin/kdumpctl stop (code=exited, status=0/SUCCESS)
  Process: 8911 ExecStart=/usr/bin/kdumpctl start (code=killed, signal=TERM)
 Main PID: 8911 (code=killed, signal=TERM)

Apr 22 17:02:56 dhg3 systemd[1]: Starting Crash recovery kernel arming...
Apr 22 17:02:56 dhg3 systemd[1]: Stopping Crash recovery kernel arming...
Apr 22 17:02:56 dhg3 systemd[1]: Starting Crash recovery kernel arming...
Apr 22 17:02:56 dhg3 systemd[1]: kdump.service start request repeated too quickly, refusing to start.
Apr 22 17:02:56 dhg3 systemd[1]: Failed to start Crash recovery kernel arming.
Apr 22 17:02:56 dhg3 systemd[1]: Unit kdump.service entered failed state.

The ratelimiting can be disabled by adding StartLimitInterval=0 to the kdump
service file.

Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
This commit is contained in:
Prarit Bhargava 2014-05-02 10:28:34 -04:00 committed by WANG Chao
parent 649f83713e
commit f28832759e
1 changed files with 1 additions and 0 deletions
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1
kdump.service
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@ -7,6 +7,7 @@ Type=oneshot
ExecStart=/usr/bin/kdumpctl start
ExecStop=/usr/bin/kdumpctl stop
RemainAfterExit=yes
StartLimitInterval=0
[Install]
WantedBy=multi-user.target