path: root/Documentation/IPMI.txt
diff options
authorCorey Minyard <>2007-10-18 03:07:09 -0700
committerLinus Torvalds <>2007-10-18 14:37:32 -0700
commit650dd0c7faf8126aaa261833dc9171a070deeaf3 (patch)
tree02d7d4674995442072f6516897f873361368d889 /Documentation/IPMI.txt
parentf8fbcd3b9da5830fded133dbeb7066b1b92ee736 (diff)
IPMI: documentation fixes
Clean up IPMI documentation to remove references to high-res timers and add info about the polling thread. Also fix an doc error for a parameter. Signed-off-by: Corey Minyard <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
Diffstat (limited to 'Documentation/IPMI.txt')
1 files changed, 10 insertions, 7 deletions
diff --git a/Documentation/IPMI.txt b/Documentation/IPMI.txt
index 24dc3fcf1594..83b05459eb5c 100644
--- a/Documentation/IPMI.txt
+++ b/Documentation/IPMI.txt
@@ -441,17 +441,20 @@ ACPI, and if none of those then a KCS device at the spec-specified
0xca2. If you want to turn this off, set the "trydefaults" option to
-If you have high-res timers compiled into the kernel, the driver will
-use them to provide much better performance. Note that if you do not
-have high-res timers enabled in the kernel and you don't have
-interrupts enabled, the driver will run VERY slowly. Don't blame me,
+If your IPMI interface does not support interrupts and is a KCS or
+SMIC interface, the IPMI driver will start a kernel thread for the
+interface to help speed things up. This is a low-priority kernel
+thread that constantly polls the IPMI driver while an IPMI operation
+is in progress. The force_kipmid module parameter will all the user to
+force this thread on or off. If you force it off and don't have
+interrupts, the driver will run VERY slowly. Don't blame me,
these interfaces suck.
The driver supports a hot add and remove of interfaces. This way,
interfaces can be added or removed after the kernel is up and running.
-This is done using /sys/modules/ipmi_si/hotmod, which is a write-only
-parameter. You write a string to this interface. The string has the
+This is done using /sys/modules/ipmi_si/parameters/hotmod, which is a
+write-only parameter. You write a string to this interface. The string
+has the format:
The "op"s are: