Messages in this thread | | | Subject | Re: [Xen-devel] [PATCH] xen/cpu: Make VCPU hotplug code online CPUs properly. | From | Ian Campbell <> | Date | Fri, 10 Feb 2012 15:03:46 +0000 |
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On Fri, 2012-02-10 at 14:43 +0000, Konrad Rzeszutek Wilk wrote: > Offlining CPUs works. Onlining does not work anymore and it looks > like we were missing a cpu_up() call in the hotplug bring up path.
Wasn't this a deliberate decision as part of the pvops upstreaming to be consistent with native cpu hotplug? After hotplugging a CPU administrator action is needed to actually online it.
http://xen.1045712.n5.nabble.com/cpu-down-but-no-cpu-up-in-drivers-xen-cpu-hotplug-c-td2545244.html
The fix is to add a udev rule: http://wiki.xen.org/wiki/Paravirt_Linux_CPU_Hotplug
Ian.
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