Diffstat (limited to 'Documentation/IPMI.txt')
1 files changed, 5 insertions, 3 deletions
diff --git a/Documentation/IPMI.txt b/Documentation/IPMI.txt
index 83b05459eb5..bc38283379f 100644
@@ -584,9 +584,11 @@ The watchdog will panic and start a 120 second reset timeout if it
gets a pre-action. During a panic or a reboot, the watchdog will
start a 120 timer if it is running to make sure the reboot occurs.
-Note that if you use the NMI preaction for the watchdog, you MUST
-NOT use nmi watchdog mode 1. If you use the NMI watchdog, you
-must use mode 2.
+Note that if you use the NMI preaction for the watchdog, you MUST NOT
+use the nmi watchdog. There is no reasonable way to tell if an NMI
+comes from the IPMI controller, so it must assume that if it gets an
+otherwise unhandled NMI, it must be from IPMI and it will panic
Once you open the watchdog timer, you must write a 'V' character to the
device to close it, or the timer will not stop. This is a new semantic