Messages in this thread | | | Date | Mon, 7 Nov 2011 17:04:58 +0000 | From | Matthew Garrett <> | Subject | Re: Fwd: Kernel Power management ?? turning off used devices that are in use. |
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On Fri, Nov 04, 2011 at 02:56:25PM +0800, hagar wrote: > > I have traced this behaviour to the cpu hotplug code. > > I need to be able to either switch off cpu hotpluging - or at least > prevent hotplugging certain cpu's
The kernel doesn't automatically hotplug CPUs on idle. Something in your userspace is doing so. I think that Ubuntu's powernap will do so under certain circumstances - try disabling that if you have it.
(Which doesn't alter the fact that there appears to be a bug here)
-- Matthew Garrett | mjg59@srcf.ucam.org
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