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| author | Corey Minyard <cminyard@mvista.com> | 2007-10-18 03:07:09 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-18 14:37:32 -0700 |
| commit | 650dd0c7faf8126aaa261833dc9171a070deeaf3 (patch) | |
| tree | 02d7d4674995442072f6516897f873361368d889 /Documentation/IPMI.txt | |
| parent | f8fbcd3b9da5830fded133dbeb7066b1b92ee736 (diff) | |
| download | lwn-650dd0c7faf8126aaa261833dc9171a070deeaf3.tar.gz lwn-650dd0c7faf8126aaa261833dc9171a070deeaf3.zip | |
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 <cminyard@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/IPMI.txt')
| -rw-r--r-- | Documentation/IPMI.txt | 17 |
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 false. -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 -format: +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: <op1>[:op2[:op3...]] The "op"s are: add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]] |