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SarahS93
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Joined: 21 Nov 2013
Posts: 469

PostPosted: Thu Jan 05, 2017 4:48 pm    Post subject: cpu hotplug into a virtual machine Reply with quote

what hardware do i need to add and to remove a cpu in qemu virtual machine?
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eccerr0r
Watchman
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Joined: 01 Jul 2004
Posts: 7134
Location: almost Mile High in the USA

PostPosted: Thu Jan 05, 2017 8:04 pm    Post subject: Reply with quote

<witty riddle response>
None, it should be done in software.
</witty riddle response>

You just need to have CPU hotplug support in the guest OS. Having guest hotplug CPU ACPI support helps too. Pretty much depends on the guest OS what it will do with the hotplugged CPU. Last time I tried it on my Gentoo in Gentoo I had to manually tell it to use the new CPUs.
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