TSCs are a no-no on i386
Quoted 2 lines
Hopefully there are not too many SMP-486 machines out there ;-).
The mach-voyager subarchitecture code in 2.6 is designed to be able to boot an SMP 486 system. I actually have (or rather have the cards to build) a 5-way 486 system. (Although the cpu's were all certified as having correct cmpxchg semantics).
James