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-rw-r--r--Documentation/IPMI.txt9
1 files changed, 8 insertions, 1 deletions
diff --git a/Documentation/IPMI.txt b/Documentation/IPMI.txt
index 0e3924ecd76..9101cbf2d88 100644
--- a/Documentation/IPMI.txt
+++ b/Documentation/IPMI.txt
@@ -502,7 +502,10 @@ used to control it:
modprobe ipmi_watchdog timeout=<t> pretimeout=<t> action=<action type>
preaction=<preaction type> preop=<preop type> start_now=x
- nowayout=x
+ nowayout=x ifnum_to_use=n
+
+ifnum_to_use specifies which interface the watchdog timer should use.
+The default is -1, which means to pick the first one registered.
The timeout is the number of seconds to the action, and the pretimeout
is the amount of seconds before the reset that the pre-timeout panic will
@@ -624,5 +627,9 @@ command line. The parameter is also available via the proc filesystem
in /proc/sys/dev/ipmi/poweroff_powercycle. Note that if the system
does not support power cycling, it will always do the power off.
+The "ifnum_to_use" parameter specifies which interface the poweroff
+code should use. The default is -1, which means to pick the first one
+registered.
+
Note that if you have ACPI enabled, the system will prefer using ACPI to
power off.