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Linux Cross Reference
Linux/Documentation/smp.txt

Version: ~ [ 2.4.0 ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 To set up SMP
  2 
  3 Configure the kernel and answer Y to CONFIG_SMP.
  4 
  5 If you are using LILO, it is handy to have both SMP and non-SMP
  6 kernel images on hand. Edit /etc/lilo.conf to create an entry
  7 for another kernel image called "linux-smp" or something.
  8 
  9 The next time you compile the kernel, when running a SMP kernel,
 10 edit linux/Makefile and change "MAKE=make" to "MAKE=make -jN"
 11 (where N = number of CPU + 1, or if you have tons of memory/swap
 12  you can just use "-j" without a number). Feel free to experiment
 13 with this one.
 14 
 15 Of course you should time how long each build takes :-)
 16 Example:
 17    make config
 18    time -v sh -c 'make dep ; make clean install modules modules_install'
 19 
 20 If you are using some Compaq MP compliant machines you will need to set
 21 the operating system in the BIOS settings to "Unixware" - don't ask me
 22 why Compaqs don't work otherwise.

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