Messages in this thread | | | Date | Thu, 24 Feb 2011 21:04:31 +0000 | From | Alan Cox <> | Subject | Re: [PATCH V5 2/2] tracing, perf : add cpu hotplug trace events |
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> That's the equivalent of physical hotplug, but we still have all the > memory state around, so it is possible from idle, when we have the
All sorts of other state goes walking as well though - on die device state for example like the GPU context may well also evaporate or disappear except for the minimum needed for scanout.
It's not just about the CPU its a system (albeit a SoC in most cases) going to sleep lock stock and barrel except for IRQ notifications, and in some cases things like offloaded audio playback.
Alan
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