Abort function for storage devices by using a poison bit flag wherein a command for indicating which command should be aborted

摘要

An abort function for storage devices sets a “poison bit” flag in the command to be deleted while the command resides on a submission queue prior to being fetched by the SSD controller. In response to the set “poison bit” flag, a storage device controller aborts execution of the I/O command and returns an abort successful status reply to the completion queue.

主权项

1. A method of executing an abort command in a system including a host communicating with a storage device, the method comprising:
storing an input/output (I/O) command in an I/O submission queue located in system memory; receiving an abort command with respect to the I/O command placed on the I/O submission queue; setting a “poison bit” flag within the I/O command placed on the I/O submission queue indicating that the I/O command should be aborted; fetching, by a storage device controller included as part of the storage device, the I/O command from the I/O submission queue; aborting execution of the I/O command in response to the bit indicating the I/O command should be aborted; and returning a result indicating the abort was successful to an I/O completion queue located in the system memory.