2.6.12.1 kernels - Issue with hyperthreading not showing as on

We took a few server to kernel 2.6.12.1 and previously it showed 4 cpu (2 dual xeons with hyperthreading) now it only shows 2 cpus. My tech says he's almost 100% hyperthreading is on.

Anyone have any thoughts or experience with this?

 

 

 

 

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