| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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 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. |