>>I don't known if the event is the same for kvm cpu hotplug.
This udev rule is working (I take it from opensuse and rhel)
80-hotplug-cpu-mem.rules
# Hotplug physical CPU
SUBSYSTEM=="cpu", ACTION=="add", TEST=="online", ATTR{online}=="0", \
ATTR{online}="1"
# Hotplug physical memory
SUBSYSTEM=="memory", ACTION=="add", TEST=="state", ATTR{state}=="offline", \
ATTR{state}="online"
Don't work with debian wheezy (3.10 kernel), but work with jessie. (So maybe
it's udev version related).
Works out of the box with rhel7 guest.
----- Mail original -----
De: "Alexandre DERUMIER" <[email protected]>
À: [email protected]
Envoyé: Mardi 7 Janvier 2014 07:06:48
Objet: Re: [pve-devel] RFC : qemu-server : add cpu_hotplug
>>(I'm not sure,but maybe this could be done auto with qemu-ga)
I see some guy doing it with qemu-ga, but maybe it's also possible with a clean
udev rule in guest.
xen is doing it with this udev rules
SUBSYSTEM=="cpu",ACTION=="add",RUN+="/bin/sh -c '[ ! -e /sys$devpath/online ]
|| echo 1 > /sys$devpath/online'"
I don't known if the event is the same for kvm cpu hotplug.
----- Mail original -----
De: "Alexandre Derumier" <[email protected]>
À: [email protected]
Envoyé: Lundi 6 Janvier 2014 17:56:46
Objet: [pve-devel] RFC : qemu-server : add cpu_hotplug
Theses patches are cpu_hotplug feature.
unplug is not yet available in current qemu.
This introduce a new "maxcpus" config value.
If maxcpus is defined, sockets should be set to 1, as we can only hotplug
1cpu/core step by step, up to maxcpus value.
Tested under debian with kernel 3.2.
cpu need to be enabled after hotplug in guest with "echo 1 >
/sys/devices/system/cpu/cpuX/online".
(I'm not sure,but maybe this could be done auto with qemu-ga)
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