Method and device for live migration of virtual machine in a multi-root I/O virtualization environment and computing host thereof

Patent metadata

Field	Value
Publication number	US-10838762-B2
Application number	US-201715851331-A
Country	US
Kind code	B2
Filing date	Dec 21, 2017
Priority date	Nov 30, 2017
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

A method for live migration of a virtual machine in a MR-IOV environment is provided. The method is used in a system, wherein the system includes a plurality of computing hosts, an MR-IOV device, and a management host including a physical function and configured to implement a plurality of virtual functions. Eand each computing host and the management host are coupled to the MR-IOV device. The method includes: migrating, by a source computing host of the computing hosts, a source virtual machine in the source computing host to a destination VM in a destination computing host of the computing hosts, wherein the source VM includes a source VF; transmitting, by the destination computing host, a request message to a management host and reassigning, by the management host, a first VF corresponding to the source VF in the management host to the destination VM according to the request message.

First claim

What is claimed is:

1. A method for live migration of a virtual machine in a multi-root I/O virtualization (MR-IOV) environment, used in a system, wherein the system at least comprises a plurality of computing hosts, an MR-IOV device and a management host including a physical function (PF) and configured to implement a plurality of virtual functions (VF), and each computing host and the management host are communicatively coupled to the MR-IOV device, the method comprising:
migrating, by a source computing host of the computing hosts, a source virtual machine (VM) in the source computing host to a destination VM in a destination computing host of the computing hosts, wherein the source VM includes a source VF;
transmitting, by the destination computing host, a request message to a management host; and
reassigning, by the management host, a first VF corresponding to the source VF in the management host to the destination VM according to the request message;
wherein after the source computing host migrates the source VM to the destination VM, the method further comprises:
transmitting, by the source computing host, a configuration message to the destination computing host; and
remapping, by a hypervisor controlled by the destination computing host, the configuration information to an extended page table (EPT) of the destination computing host.

2. The method for live migration of a virtual machine in a multi-root I/O virtualization (MR-IOV) environment as claimed in claim 1 , after the source computing host migrates the source VM to the destination VM, the method further comprising:
transmitting, by the source computing host, a notification message to the management host to notify the management host that the source computing host has de-allocated the source VM.

3. The method for live migration of a virtual machine in a multi-root I/O virtualization (MR-IOV) environment as claimed in claim 1 , wherein the configuration information at least comprises:
peripheral component interconnection express (PCIe) ID;
configuration space;
control and status register (CSR) addresses;
Rx ring buffer addresses;
Tx ring buffer addresses;
Rx packet buffer addresses; and
Tx packet buffer addresses.

4. A system for live migration of a virtual machine in a multi-root I/O virtualization (MR-IOV) environment, comprising:
an MR-IOV device;
a plurality of computing hosts, wherein each computing host is communicatively coupled to the MR-IOV device via a peripheral component interconnection express (PCIe) link; and
a management host, comprising a physical function (PF) and configured to implement a plurality of virtual functions (VF), wherein the management host is communicatively coupled to the MR-IOV device via a PCIe slot of the MR-IOV device;
wherein a source computing host of the computing hosts migrates a source virtual machine (VM) in the source computing host to a destination VM in a destination computing host of the computing hosts, wherein the source VM includes a source VF;
the source computing host transmits a request message to the management host; and
the management host reassigns a first VF corresponding to the source VF in the management host to the destination VM according to the request message;
wherein after the source computing host migrates the source VM to the destination VM, the source computing host transmits a configuration message to the destination computing host, and a hypervisor controlled by the destination computing host remaps the configuration information to an extended page table (EPT) of the destination computing host.

5. The system for live migration of a virtual machine in a multi-root I/O virtualization (MR-IOV) environment as claimed in claim 4 , after the source computing host migrates the source VM to the destination VM, the source computing host transmits a notification message to the management host to notify the management host that the source computing host has de-allocated the source VM.

6. The system for live migration of a virtual machine in a multi-root I/O virtualization (MR-IOV) environment as claimed in claim 4 , wherein the configuration information at least comprises:
PCIe ID;
configuration space;
control and status register (CSR) addresses;
Rx ring buffer addresses;
Tx ring buffer addresses;
Rx packet buffer addresses; and
Tx packet buffer addresses.

7. A method for live migration of a virtual machine in a multi-root I/O virtualization (MR-IOV) environment, used in a computing host, wherein the method comprises:
controlling a hypervisor to migrate a source virtual machine (VM) including a source virtual function (VF) in the computing host to a destination VM in a destination computing host; and
transmitting a configuration message to the destination computing host,
wherein the computing host and the destination computing host are coupled to an MR-IOV device to communicate with a management host;
remapping, by the hypervisor controlled by the destination computing host, the configuration information to an extended page table (EPT) of the destination computing host.

8. The method for live migration of a virtual machine in a multi-root I/O virtualization (MR-IOV) environment as claimed in claim 7 , wherein after migrating the source VM to the destination VM, the method further comprises:
transmitting a notification message to the management host to notify the management host that the source computing host has de-allocated the source VM.

9. The method for live migration of a virtual machine in a multi-root I/O virtualization (MR-IOV) environment as claimed in claim 7 , wherein the configuration information at least comprises:
peripheral component interconnection express (PCIe) ID;
configuration space;
control and status register (CSR) addresses;
Rx ring buffer addresses;
Tx ring buffer addresses;
Rx packet buffer addresses; and
Tx packet buffer addresses.

10. A computing host for live migration of a virtual machine in a multi-root I/O virtualization (MR-IOV) environment, comprising:
one or more processors; and
one or more computer storage media, storing one or more computer-readable instructions, wherein the processor is configured to drive the computer storage media to execute the following tasks:
controlling a hypervisor to migrate a source virtual machine (VM) including a source virtual function (VF) in the computing host to a destination VM in a destination computing host; and
transmitting a configuration message to the destination computing host,
wherein the computing host and the destination computing host are coupled to an MR-IOV device to communicate with a management host;
remapping, by the hypervisor controlled by the destination computing host, the configuration information to an extended page table (EPT) of the destination computing host.

11. The computing host for live migration of a virtual machine in a multi-root I/O virtualization (MR-IOV) environment as claimed in claim 10 , wherein after migrating the source VM to the destination VM, the processor further executes the following tasks:
transmitting a notification message to the management host to notify the management host that the source computing host has de-allocated the source VM.

12. The method for live migration of a virtual machine in a multi-root I/O virtualization (MR-IOV) environment as claimed in claim 10 , wherein the configuration information at least comprises:
PCIe ID;
configuration space;
control and status register (CSR) addresses;
Rx ring buffer addresses;
Tx ring buffer addresses;
Rx packet buffer addresses; and
Tx packet buffer addresses.

13. A method for live migrat

Assignees

• Ind Tech Res Inst

Inventors

• Lee Chao-Tang
• Hsiao Tai-Hua
• Tu Cheng-Chun
• Hsu Peng-Kai

Classifications

• G06F9/45558 Primary

  Hypervisor-specific management and integration aspects · CPC title

• G06F2009/45579

  I/O management, e.g. providing access to device drivers or storage · CPC title

• G06F2009/4557

  Distribution of virtual machine instances; Migration and load balancing · CPC title

• G06F9/4856 Primary

  resumption being on a different machine, e.g. task migration, virtual machine migration (G06F9/5088 takes precedence) · CPC title

• G06F13/4282

  on a serial bus, e.g. I2C bus, SPI bus (on daisy chain buses G06F13/4247) · CPC title