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@@ -655,6 +655,13 @@ watchdog_device
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Watchdog device to use.
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The default value is /dev/watchdog.
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The special value "off" disables watchdog usage.
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+.IP
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+In a cluster with properly configured power fencing a watchdog
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+provides no additional value. On the other hand, slow watchdog
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+communication may incur multi-second delays in the Corosync main loop,
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+potentially breaking down membership. IPMI watchdogs are particularly
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+notorious in this regard: read about kipmid_max_busy_us in IPMI.txt in
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+the Linux kernel documentation.
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.SH "FILES"
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.TP
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Ferenc Wágner