Simultaneous kernel mode and user mode access to a device using the NVMe interface

摘要

A system and method for enabling simultaneous kernel-mode access and user-mode access to an NVMe device (200) using the NVMe interface are disclosed. The method comprises generating a first set of queue (s) (113) by at least reserving a first range of memory addresses in the kernel space (110); providing a location address and size of the first set of queues (113) for a controller of the NVMe device (200); receiving a request for user-mode access from a user application process running on the host computer system; and performing the following in response to receiving the request for user mode access: generating a second set of queue (s) (132) by at least reserving a second range of memory addresses for use by the user application process and providing a location address and size of the second set of queues (132) for the user application process and the controller of the NVMe device (200).