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SMP support for Linux with up to 16 processors using the Intel MP
specification.
WARNING:
This is experimental. Back up your disks first. Experience is that
it is basically stable in its current (inefficient form).
To fix:
o Fix sys_idle to exit/enter kernel state and do hlt's.
o Fix scheduler decisions to reschedule. Per cpu reschedule ?
o Clean up message pass.
o Test for B stepping processors.
o Clean up processor specific/independent split.
o Document it all. [PARTLY DONE]
o Halt other CPU's on reset/panic doesn't always work.
o Don't waste page at 4K - don't need it now.(watch the GDT code).
o Dump bootup pages once booted somehow.
o Clean up warnings/volatiles.
o Fix load_TR() for non contiguous processor ids
o Iterate over the slave timer requests if one is lost (keep a count per cpu)
o Distribute irq's (locking present just needs the 82489 to be asked
nicely).
o 486 startup code.
o How to handle mixed FPU/non FPU processors.
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