Queue utilization for optimized storage access

Abstract

A storage controller includes a processing device to send a Non-Volatile Memory Express over Fibre Channel (NVMe/FC) command to a submission queue without routing the NVMe/FC command through a kernel space, the submission queue being reserved for direct access by an initiator device to a user space of the storage controller.

What is claimed is: 
     
         1 . A system comprising:
 a storage controller comprising a processing device to:   send a Non-Volatile Memory Express over Fibre Channel (NVMe/FC) command from a user application to a submission queue, the NVMe/FC command bypassing a kernel space, wherein the submission queue is reserved for direct access by an initiator device via the user application.   
     
     
         2 . The system of  claim 1 , wherein the processing device is to instruct a Fibre Channel Host Bus Adapter (FC HBA) to route the NVMe/FC command to the submission queue. 
     
     
         3 . The system of  claim 2 , wherein the NVMe/FC command is received by the FC HBA via a fiber-channel non-volatile memory express (FC NVMe) interface of a storage controller. 
     
     
         4 . The system of  claim 1 , wherein the processing device is further to:
 send a second NVMe/FC command that is to be routed through a kernel space to a second submission queue, the second submission queue being reserved for use by a kernel space of a storage controller.   
     
     
         5 . The system of  claim 4 , wherein the submissions queue and the second submission queue are to communicate concurrently with the initiator device. 
     
     
         6 . The system of  claim 1 , wherein the NVMe/FC command is to be routed through an NVMe/FC stack. 
     
     
         7 . The system of  claim 1 , wherein the processing device is further to:
 transmit a command to a kernel space device driver to allocate the submission queue for the direct access to user space.   
     
     
         8 . A method comprising:
 transmitting a command directly from a user application to a submission queue, the command bypassing a kernel space, the submission queue reserved for direct access by an initiator device via the user application.   
     
     
         9 . The method of  claim 8 , wherein the command corresponds to a Non-Volatile Memory Express over Fibre Channel (NVMe/FC) command. 
     
     
         10 . The method of  claim 9 , further comprising:
 instructing a Fibre Channel Host Bus Adapter (FC HBA) to route the NVMe/FC command to the submission queue.   
     
     
         11 . The method of  claim 9 , wherein the NVMe/FC command is to be routed through an NVMe/FC stack in user space. 
     
     
         12 . The method of  claim 11 , wherein the NVMe/FC command is received by the FC HBA via a fiber-channel non-volatile memory express (FC NVMe) interface of a storage controller. 
     
     
         13 . The method of  claim 8 , further comprising:
 sending a second NVMe/FC command that is to be routed through a kernel space to a second submission queue, the second submission queue being reserved for use by a kernel space of a storage controller.   
     
     
         14 . The method of  claim 13 , wherein the submissions queue and the second submission queue are to communicate concurrently with the initiator device. 
     
     
         15 . A non-transitory computer readable storage medium storing instructions, which when executed, cause a processing device of a storage controller to:
 transmit a command directly from a user application to a submission queue, the command bypassing a kernel space, the submission queue reserved for direct access by an initiator device via the user application.   
     
     
         16 . The non-transitory computer readable storage medium of  claim 15 , wherein the command corresponds to a Non-Volatile Memory Express over Fibre Channel (NVMe/FC) command. 
     
     
         17 . The non-transitory computer readable storage medium of  claim 16 , wherein the processing device is to instruct a Fibre Channel Host Bus Adapter (FC HBA) to route the NVMe/FC command to the submission queue. 
     
     
         18 . The non-transitory computer readable storage medium of  claim 16 , wherein the NVMe/FC command is to be routed through an NVMe/FC stack. 
     
     
         19 . The non-transitory computer readable storage medium of  claim 18 , wherein the NVMe/FC command is received by the FC HBA via a fiber-channel non-volatile memory express (FC NVMe) interface of the storage controller. 
     
     
         20 . The non-transitory computer readable storage medium of  claim 15 , wherein the processing device is further to:
 send a second NVMe/FC command that is to be routed through a kernel space to a second submission queue, the second submission queue being reserved for use by a kernel space of a storage controller.