From: Randy Dunlap Date: Sat, 17 Feb 2007 18:58:30 +0000 (+0100) Subject: doc: make doc. for maxcpus= more visible X-Git-Tag: v2.6.21-rc1~71^2~7 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=78f92a82c20a9f66d215f6c6d96fb91c0763ce95;p=linux-2.6-omap-h63xx.git doc: make doc. for maxcpus= more visible 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 Signed-off-by: Adrian Bunk --- diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index abd575cfc75..f6a3961da34 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -863,7 +863,14 @@ and is between 256 and 4096 characters. It is defined in the file 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=", where + is an integer greater than 0, limits the maximum number + of CPUs activated in SMP mode to . + 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.