Method and apparatus for upgrading vhost-net module
A method and an apparatus for upgrading a para-virtualized network adapter kernel acceleration module are disclosed. The method includes switching a network flow of a first para-virtualized network adapter kernel acceleration module to a user mode for transmission; removing the first para-virtualized network adapter kernel acceleration module; inserting a second para-virtualized network adapter kernel acceleration module; and switching a transmission of the network flow in the user mode to a transmission by the second para-virtualized network adapter kernel acceleration module. The method and the apparatus for upgrading a para-virtualized network adapter kernel acceleration module switches between a kernel mode and a user mode for a network flow without affecting fluctuations in a network flow of a virtual machine. An upgrade of a para-virtualized network adapter kernel acceleration module is achieved, which is unnoticeable by a user, and user experience is not affected.
1. A method comprising:
switching a network flow of a first para-virtualized network adapter kernel acceleration module to a user mode for transmission;
removing the first para-virtualized network adapter kernel acceleration module;
inserting a second para-virtualized network adapter kernel acceleration module; and
switching a transmission of the network flow in the user mode to a transmission by the second para-virtualized network adapter kernel acceleration module.
2. The method of claim 1 , wherein switching the network flow of the first para-virtualized network adapter kernel acceleration module to the user mode for transmission comprises:
a process of a machine virtualizer obtaining a usage status of a shared memory; and
the process of the machine virtualizer controlling sending and/or receiving network data packets in the shared memory.
3. The method of claim 2 , wherein switching the network flow of the first para-virtualized network adapter kernel acceleration module to the user mode for transmission further comprises stopping a poll of a kernel thread of the first para-virtualized network adapter kernel acceleration module.
4. The method of claim 1 , wherein removing the first para-virtualized network adapter kernel acceleration module comprises clearing up resources of the first para-virtualized network adapter kernel acceleration module.
5. The method of claim 1 , wherein inserting the second para-virtualized network adapter kernel acceleration module comprises initializing resources of the second para-virtualized network adapter kernel acceleration module.
6. The method of claim 1 , wherein switching the transmission of the network flow in the user mode to the transmission by the second para-virtualized network adapter kernel acceleration module comprises:
the second para-virtualized network adapter kernel acceleration module creating a kernel thread;
the kernel thread of the second para-virtualized network adapter kernel acceleration module obtaining a usage status of a shared memory; and
the kernel thread of the second para-virtualized network adapter kernel acceleration module controlling sending and/or receiving of network data packets in the shared memory.
7. The method of claim 6 , wherein switching the transmission of the network flow in the user mode to the transmission by the second para-virtualized network adapter kernel acceleration module further comprises opening a poll of the kernel thread of the second para-virtualized network adapter kernel acceleration module.
8. An apparatus comprising:
one or more processors;
memory storing executable instructions that, when executed by the one or more processors, cause the one or more processors to perform acts comprising:
switching a network flow of a first para-virtualized network adapter kernel acceleration module to a user mode for transmission;
removing the first para-virtualized network adapter kernel acceleration module;
inserting a second para-virtualized network adapter kernel acceleration module; and
switching a transmission of the network flow in the user mode to a transmission by the second para-virtualized network adapter kernel acceleration module.
9. The apparatus of claim 8 , wherein the acts further comprise enabling a process of a machine virtualizer to obtain a usage status of a shared memory, and enabling the process of the machine virtualizer to control sending and/or receiving of a data packet in the shared memory.
10. The apparatus of claim 9 , the acts further comprise stopping a poll of a kernel thread of the first para-virtualized network adapter kernel acceleration module.
11. The apparatus of claim 8 , wherein the acts further comprise clearing up resources of the first para-virtualized network adapter kernel acceleration module.
12. The apparatus of claim 8 , wherein the acts further comprise initializing resources of the second para-virtualized network adapter kernel acceleration module.
13. The apparatus of claim 8 , wherein the acts further comprise creating a kernel thread for the second para-virtualized network adapter kernel acceleration module, enabling the kernel thread of the second para-virtualized network adapter kernel acceleration module to obtain a usage status of a shared memory, and to control sending and/or receiving of network data packets in the shared memory.
14. The apparatus of claim 13 , wherein the acts further comprise opening a poll of the kernel thread of the second para-virtualized network adapter kernel acceleration module.
15. One or more computer-readable media storing executable instructions that, when executed by one or more processors, cause the one or more processors to perform acts comprising:
switching a network flow of a first para-virtualized network adapter kernel acceleration module to a user mode for transmission;
removing the first para-virtualized network adapter kernel acceleration module;
inserting a second para-virtualized network adapter kernel acceleration module; and
switching a transmission of the network flow in the user mode to a transmission by the second para-virtualized network adapter kernel acceleration module.
16. The one or more computer-readable media of claim 15 , wherein switching the network flow of the first para-virtualized network adapter kernel acceleration module to the user mode for transmission comprises:
a process of a machine virtualizer obtaining a usage status of a shared memory; and
the process of the machine virtualizer controlling sending and/or receiving network data packets in the shared memory.
17. The one or more computer-readable media of claim 16 , wherein switching the network flow of the first para-virtualized network adapter kernel acceleration module to the user mode for transmission further comprises stopping a poll of a kernel thread of the first para-virtualized network adapter kernel acceleration module.
18. The one or more computer-readable media of claim 15 , wherein removing the first para-virtualized network adapter kernel acceleration module comprises clearing up resources of the first para-virtualized network adapter kernel acceleration module.
19. The one or more computer-readable media of claim 15 , wherein inserting the second para-virtualized network adapter kernel acceleration module comprises initializing resources of the second para-virtualized network adapter kernel acceleration module.
20. The one or more computer-readable media of claim 15 , wherein switching the transmission of the network flow in the user mode to the transmission by the second para-virtualized network adapter kernel acceleration module comprises
the second para-virtualized network adapter kernel acceleration module creating a kernel thread;
the kernel thread of the second para-virtualized network adapter kernel acceleration module obtaining a usage status of a shared memory;
the kernel thread of the second para-virtualized network adapter kernel acceleration module controlling sending and/or receiving of network data packets in the shared memory; and
opening a poll of the kernel thread of the second para-virtualized network adapter kernel acceleration module.