Adding another processor
 

I've got a server that i've added another processor to. I don't remember if i enabled smp support or not during installation. How do i figure out if i did or not, and if not, what do i need to do to get both processors recognized?

I'm a newbie but here's what i would do to figure out what's going on. If proc fs support is built into the kernel then try cat /proc/cpuinfo at the command line. if you get only one processor ID (that's usually ID 0) in the processor field then SMP support is not enabled. If this is the case, you should recompile the kernel with SMP support. I don't know if this is possible without compiling the whole kernel from scratch (this is how I did it) but if you can afford a reboot that would be the best solution. download the source from www.kernel.org, tar xjfv linux-ver.bz2, cd dir_created, cp ../old_linux_dir/.config ./.config, make oldconfig, make xconfig (if an X server and Qt libraries are installed that is), make changes to the config file, make && make modules_install, cp ./arch/i386/boot/bzImage /root/bzImageSMP and then edit lilo.conf or grub.conf to boot the new kernel.

For more detailed info check http://www.kernelnewbies.org/faq/index.php3#compile and www.tldp.org