Commit 78f92a82 authored by Randy Dunlap's avatar Randy Dunlap Committed by Adrian Bunk
Browse files

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: default avatarRandy Dunlap <>
Signed-off-by: default avatarAdrian Bunk <>
parent 4b2d5c04
......@@ -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.
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