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Change CPU count on live Linux VM
2019 Community Moderator ElectionWeight-based block IO control for VMsVirtualBox guest: 16 CPUs detected but only 1 onlineGentoo virt-manager on system without GNOME cannot connect to libvirtd due to polkit throwing a missing file errorQuestion about CentOS and KVM virtualization and PCI PassthroughVery high I/O wait time on KVM virtual machineWhen is `irqbalance` needed in a Linux VM under VMware?Virtualization to switch systems without rebootCan i trust /proc/cpuinfo in a virtual environmentUnknown NMI reason 20 and 30 on a VMWhy is the wrong number of vCPUs assigned to the VM unless the topology is declared?
Is it possible to change the number of VCPUs on a KVM virtual machine on Linux without stopping it first? The Linux kernel has calls for addition and removal of CPUs (CPU hotplug in the Kernel) for physical machines (on hardware that supports that) but I can't find anything on VMs and how to allocate more/fewer resources to running machines.
linux linux-kernel virtual-machine kvm hot-plug
asked yesterday
rbanffyrbanffy
49648
add a comment |
Is it possible to change the number of VCPUs on a KVM virtual machine on Linux without stopping it first? The Linux kernel has calls for addition and removal of CPUs (CPU hotplug in the Kernel) for physical machines (on hardware that supports that) but I can't find anything on VMs and how to allocate more/fewer resources to running machines.
linux linux-kernel virtual-machine kvm hot-plug
asked yesterday
rbanffyrbanffy
49648
add a comment |
Is it possible to change the number of VCPUs on a KVM virtual machine on Linux without stopping it first? The Linux kernel has calls for addition and removal of CPUs (CPU hotplug in the Kernel) for physical machines (on hardware that supports that) but I can't find anything on VMs and how to allocate more/fewer resources to running machines.
linux linux-kernel virtual-machine kvm hot-plug
asked yesterday
rbanffyrbanffy
49648
Is it possible to change the number of VCPUs on a KVM virtual machine on Linux without stopping it first? The Linux kernel has calls for addition and removal of CPUs (CPU hotplug in the Kernel) for physical machines (on hardware that supports that) but I can't find anything on VMs and how to allocate more/fewer resources to running machines.
linux linux-kernel virtual-machine kvm hot-plug
linux linux-kernel virtual-machine kvm hot-plug
asked yesterday
rbanffyrbanffy
49648
asked yesterday
rbanffyrbanffy
49648
asked yesterday
rbanffyrbanffy
49648
asked yesterday
rbanffyrbanffy
49648
asked yesterday
rbanffyrbanffy
49648
49648
add a comment |
add a comment |
1 Answer
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Yes, but only up to the maximum number of vCPUs in the virtual machine definition. Increasing the maximum number requires a shutdown.
For example, this VM has two vCPUs of a maximum 8. Increasing beyond 8 requires a shutdown.
<vcpu placement='static' current='2'>8</vcpu>
answered yesterday
Michael HamptonMichael Hampton
5,90412145
add a comment |
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1 Answer
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Yes, but only up to the maximum number of vCPUs in the virtual machine definition. Increasing the maximum number requires a shutdown.
For example, this VM has two vCPUs of a maximum 8. Increasing beyond 8 requires a shutdown.
<vcpu placement='static' current='2'>8</vcpu>
answered yesterday
Michael HamptonMichael Hampton
5,90412145
add a comment |
Yes, but only up to the maximum number of vCPUs in the virtual machine definition. Increasing the maximum number requires a shutdown.
For example, this VM has two vCPUs of a maximum 8. Increasing beyond 8 requires a shutdown.
<vcpu placement='static' current='2'>8</vcpu>
answered yesterday
Michael HamptonMichael Hampton
5,90412145
add a comment |
Yes, but only up to the maximum number of vCPUs in the virtual machine definition. Increasing the maximum number requires a shutdown.
For example, this VM has two vCPUs of a maximum 8. Increasing beyond 8 requires a shutdown.
<vcpu placement='static' current='2'>8</vcpu>
answered yesterday
Michael HamptonMichael Hampton
5,90412145
Yes, but only up to the maximum number of vCPUs in the virtual machine definition. Increasing the maximum number requires a shutdown.
For example, this VM has two vCPUs of a maximum 8. Increasing beyond 8 requires a shutdown.
<vcpu placement='static' current='2'>8</vcpu>
answered yesterday
Michael HamptonMichael Hampton
5,90412145
answered yesterday
Michael HamptonMichael Hampton
5,90412145
answered yesterday
Michael HamptonMichael Hampton
5,90412145
answered yesterday
Michael HamptonMichael Hampton
5,90412145
5,90412145
add a comment |
add a comment |
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