Originally posted by pingufunkybeat
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Linux Works Towards True CPU Hotplug Support
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All opinions are my own not those of my employer if you know who they are.
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Originally posted by Veerappan View PostWhen hotplugging memory/CPU/other you'd first send a signal of some sorts to the OS that the piece of hardware you're about to remove should be deactivated. For memory, that would mean moving all of the data off of that stick of RAM. For a CPU, all threads would be migrated onto other CPUs. The same type of process would be used for other hardware you're about to swap. It's the same idea as unmounting/ejecting a flash drive before you pull it out of the USB port.
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Originally posted by ownagefool View PostThis is the point generally. You don't really care about a desktop machine going down, but a server hosting a couple of hundred of VMs you want to be always available is a different matter. Of course, this is why you do redundancy, but it'd still be nice thing nonetheless.
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Such hotplugging should theoretically work best on a multi processor (not multicore) desktop or server system, where there are more than one discrete processors on the motherboard. What about a situation where you have a bad core within a multicore system? Could you simply turn off the bad core and limp along till you can swap the CPU in that case?
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Originally posted by DeepDayze View PostSuch hotplugging should theoretically work best on a multi processor (not multicore) desktop or server system, where there are more than one discrete processors on the motherboard. What about a situation where you have a bad core within a multicore system? Could you simply turn off the bad core and limp along till you can swap the CPU in that case?
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