Documentation update about pal_halt_light

Hello,

I had to hang around in the code to find this invaluable option "nohalt". Let's document it!

That's a trivial documentation update, please apply.

Eric Piel

--
Documentation update about pal_halt_light on IA-64

--

@@ -837,6 +837,9 @@
 			instruction doesn't work correctly and not to
 			use it.
 
+	nohalt		[IA-64] Tells the kernel not to use the power saving 
+			function PAL_HALT_LIGHT when idle.
+
 	noirqdebug	[IA-32] Disables the code which attempts to detect and
 			disable unhandled interrupt sources.
 

Eric> Hello, I had to hang around in the code to find this Eric> invaluable option "nohalt". Let's document it!

Eric> That's a trivial documentation update, please apply.

Good catch. I thought it was documented already. Perhaps it got lost. In any case, I think it would be good to mention why someone might want to turn it on. Perhaps something along the lines of:

"This increases power-consumption. On the positive side, it
reduces interrupt wake-up latency, which may improve performance in certain environments such as networked servers."

--david

Eric> -- Documentation update about pal_halt_light on IA-64

Eric> Signed-off-by: Eric Piel <[email protected]> -- --- Eric> kernel-parameters.txt.bak 2005-03-09 15:39:10.348323818 +0100 Eric> +++ kernel-parameters.txt 2005-03-09 15:55:19.583141065 +0100 Eric> @@ -837,6 +837,9 @@ instruction doesn't work correctly and not Eric> to use it.

Eric> + nohalt [IA-64] Tells the kernel not to use the power saving Eric> + function PAL_HALT_LIGHT when idle. + noirqdebug [IA-32] Eric> Disables the code which attempts to detect and disable Eric> unhandled interrupt sources.

Yes, the more, the merrier! Here is a new patch with the additional information proposed by David (and a little bit from me).

please discard the previous patch and apply this one, Eric

@@ -837,6 +837,13 @@
 			instruction doesn't work correctly and not to
 			use it.
 
+	nohalt		[IA-64] Tells the kernel not to use the power saving 
+			function PAL_HALT_LIGHT when idle. This increases 
+			power-consumption. On the positive side, it reduces
+			interrupt wake-up latency, which may improve performance
+			in certain environments such as networked servers or
+			real-time systems.
+
 	noirqdebug	[IA-32] Disables the code which attempts to detect and
 			disable unhandled interrupt sources.