SMP kernel on UP machines?

[esmith]

Matthew Dillon wrote:

    I'm not entirely sure how to do this, because the IPI code depends on
    the local APIC.   If a cpu has HTT doesn't that mean that it must also
    have a local APIC for each logical cpu?  
Yes

from http://www.ussg.iu.edu/hypermail/linux/kernel/0301.1/0630.html

The "logical" or "sibling" processor has its own local APIC. This
is necessary to send it the Startup IPI and soft IPIs while the system is
running.
However, it is a full function APIC and can receive I/O interrupts. I have
seen this happen many times.
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