SMP detection

Skylar Thompson skylar at
Thu Aug 31 00:28:06 UTC 2006

Michal Mertl wrote:
> No! Kernel threads (e.g. handling interrupts) aren't that much different
> to normal processes.
> Logical CPUs on a single HTT capable CPU share most of the CPU logic,
> especially all the external stuff (handling interrupts). Scheduling
> handling of interrupts on the "secondary/logical" core  wouldn't
> probably help performance at all (if that is at all possible).

Could you clarify note 20031022 in /usr/src/UPDATING? It states that HTT
CPUs are used for interrupts if they are detected, even if they aren't
used by regular processes. Was this something that just showed up in
pre-6.x releases?

-- Skylar Thompson (skylar at

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