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| author | Randy Dunlap <rdunlap@xenotime.net> | 2007-02-17 19:58:30 +0100 |
|---|---|---|
| committer | Adrian Bunk <bunk@stusta.de> | 2007-02-17 19:58:30 +0100 |
| commit | 78f92a82c20a9f66d215f6c6d96fb91c0763ce95 (patch) | |
| tree | f0929fcde8615bfa23334f44bf592e11c12909a1 /Documentation/kernel-parameters.txt | |
| parent | 4b2d5c049079d342e3e268c162dcecbd7bad1411 (diff) | |
| download | lwn-78f92a82c20a9f66d215f6c6d96fb91c0763ce95.tar.gz lwn-78f92a82c20a9f66d215f6c6d96fb91c0763ce95.zip | |
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>
Diffstat (limited to 'Documentation/kernel-parameters.txt')
| -rw-r--r-- | Documentation/kernel-parameters.txt | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index abd575cfc759..f6a3961da349 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. |