From 78f92a82c20a9f66d215f6c6d96fb91c0763ce95 Mon Sep 17 00:00:00 2001 From: Randy Dunlap <rdunlap@xenotime.net> Date: Sat, 17 Feb 2007 19:58:30 +0100 Subject: [PATCH] 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 <rdunlap@xenotime.net> Signed-off-by: Adrian Bunk <bunk@stusta.de> --- Documentation/kernel-parameters.txt | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index abd575cfc759a..f6a3961da3496 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=<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. -- GitLab