SMP alternatives [LWN.net]

SMP alternatives

Posted Dec 15, 2005 20:14 UTC (Thu) by captrb (subscriber, #2291)
Parent article: SMP alternatives

Can anybody speculate whether this functionality will make various
power management easier on SMP machines? It seems (without any
knowledge to back it up) that each CPU could be removed until there
was a single CPU left, then the same procedure that works on
uniprocessor machines could be performed.

It's a really shame, especially with dual core CPU's and
hyperthreading, that there is a choice between fancy power
management and multiple processors.

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SMP alternatives

Posted Dec 25, 2005 19:51 UTC (Sun) by efexis (guest, #26355) [Link]

No. This is talking about removing code once you've already switched down to a single processor, and adding code when you want to switch up.

Adding/removing processors at runtime, I believe, is already possible (otherwise this code would be pretty useless)