I recently installed FC2 to a Dell Precision 610 workstation with dual procs (P3 Xeon 500MHz) & it seems like the OS only recognizes one (top, & ps only show one cpu as well). Here is the ouput from cpuinfo. I would be curious to know if I missed something in the install process. Thanks, Rick
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 7
model name : Pentium III (Katmai)
stepping : 2
cpu MHz : 497.596
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 mmx fxsr sse
bogomips : 987.13

When you boot up, you should see two choices in the GRUB bootloader menu, "Fedora Core (2.6.blah.blah-smp)" and "Fedora Core-up (2.6.blah.blah)". Make sure you choose the first one with SMP in it.

Or do you not have that first choice about the SMP? In that case you will need to recompile the kernel with "Symmetric Multiprocessing Support" enabled.

The good news is that it looks like I've installed the proper kernel
(from grub.conf):
title Fedora Core (2.6.5-1.358smp)
root (hd1,0)
kernel /vmlinuz-2.6.5-1.358smp ro root=LABEL=/ rhgb quiet
initrd /initrd-2.6.5-1.358smp.img
Unfortunately, the machine hangs after you select it. It looks like it uncompresses the kernal, says "OK." Everything hangs right after that. Odd.
Thanks in advance, Rick