Page fault support for virtual machine network accelerators

A system comprising:

• a memory;
• and
• a processing device operatively coupled to the memory, the processing device to:
• receive, at a network accelerator device of a computer system, form a network, a first incoming packet and a second incoming packet;
• responsive to receiving a first notification that an attempt to store the first incoming packet at a first buffer of a plurality of buffers associated with the network accelerator device caused a page fault:
• store the first incoming packet at a second buffer of the plurality of buffers;
• and
• append a first identifier of the first buffer to a faulty buffer data structure;
• responsive to receiving a second notification indicating a resolution of the page fault, remove the first identifier from the faulty buffer data structure;
• store the second incoming packet at the first buffer;
• and
• forward, to a driver of the network accelerator device, a second identifier of the second buffer and the first identifier of the first buffer, wherein the plurality of buffers are allocated by the driver of the network accelerator device, and wherein the driver of the network accelerator device is executed by a guest operating system of a virtual machine running on the computer system.

A non-transitory computer-readable media storing instructions that, when executed, cause a processing device to:

• receive, at a network accelerator device of a computer system, form a network, a first incoming packet and a second incoming packet;
• responsive to receiving a first notification that an attempt to store the first incoming packet at a first buffer of a plurality of buffers associated with the network accelerator device caused a page fault:
• store the first incoming packet at a second buffer of the plurality of buffers;
• and
• append a first identifier of the first buffer to a faulty buffer data structure;
• responsive to receiving a second notification indicating a resolution of the page fault, remove the first identifier from the faulty buffer data structure;
• store the second incoming packet at the first buffer;
• and
• forward, to a driver of the network accelerator device, a second identifier of the second buffer and the first identifier of the first buffer, wherein the plurality of buffers are allocated by the driver of the network accelerator device, and wherein the driver of the network accelerator device is executed by a guest operating system of a virtual machine running on the computer system.