[PATCH] doc: make doc. for maxcpus= more visible

[Randy.Dunlap]

From: Randy Dunlap <rdunlap@xxxxxxxxxxxx>

Some people are confused about maxcpus=1 and maxcpus=0,
so put the documentation text from init/main.c into
Documentation/kernel-parameters.txt also.

Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxx>
---
 Documentation/kernel-parameters.txt |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletion(-)

--- linux-2616-rc1-secur.orig/Documentation/kernel-parameters.txt
+++ linux-2616-rc1-secur/Documentation/kernel-parameters.txt
@@ -801,7 +801,14 @@ running once the system is up.
 			Format: <1-256>
 
 	maxcpus=	[SMP] Maximum number of processors that	an SMP kernel
-			should make use of
+			should make use of.
+			Using "nosmp" or "maxcpus=0" will disable SMP
+			entirely (the MPS table probe still happens, though).
+			A command-line option of "maxcpus=<NUM>", where <NUM>
+			is an integer greater than 0, limits the maximum number
+			of CPUs activated in SMP mode to <NUM>.
+			Using "maxcpus=1" on an SMP kernel is the trivial
+			case of an SMP kernel with only one CPU.
 
 	max_addr=[KMG]	[KNL,BOOT,ia64] All physical memory greater than or
 			equal to this physical address is ignored.


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