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More recent linux kernels now have a seperate scheduler for
hyperthreaded CPUs which is different from the one used on true SMP
machines.  A hyper-threaded CPU is still only one CPU, it is not
actually dual core, treating it as such had some problems.  Since I do
not have a P4 to test with, I do not know if this is the cause of your
processor showing up differently in /proc/cpuinfo

Out of curiosity what kernel version are you currently running (uname -r)?

To import your current config, copy /boot/config`uname -r` to
/path/to/extracted/kernel/source/.config

cd into the kernel source, then type:
make oldconfig

The option you are looking for is under "Processor type and features" ->
SMT (Hyperthreading) scheduler support

To check if your current kernel has this support:
grep CONFIG_SCHED_SMT /boot/config-`uname -r`

Johnny Stork wrote:
> I had some problems with the graphical installer and so had to install 
> FC7 in text mode on my primary workstation (Intel P4, 3ghz 
> Hyperthreaded) but I noticed that my Hyperthreaded Intel CPU, which is 
> recognized as dual cpu's on all other distros of Linux and Windows, only 
> shows as having 1 cpu? I realize that SMP support is now built into the 
> single kernel, but how can I re-enable SMP support? Do I need to rebuild 
> the kernel? If so, it has been years since I did this so if I do need to 
> rebuild the kernel, can someone describe how I can
> 
> 1: Call up the existing configuration
> 2: Just make changes needed to get the hyperthreaded cpu recognised as 
> dual cpu's?
> 
> 
> grep processor /proc/cpuinfo
> processor : 0
> 
> 
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