Abstract: Performing logical partition (LPAR)-to-LPAR communication in a network computing environment. Read or write requests to different memory areas of a single computer memory are controlled by a storage control element, where the requests are issued by different multiple operating systems using a general network transfer format. A request is sent by a first operating system to said storage control element, where the request is executed with a processor instruction. A result of the request is received by the same or a second operating system. A modified processor instruction is sent to the storage control element, which implements an execution of the instruction synchronously performed to the sending of the instruction, without buffering the request of the instruction in a dedicated queue.

Abstract: The present invention discloses a solution for check-stopping firmware implemented virtual communication channels without disabling all firmware functions. In the solution, a virtual input/output subsystem of firmware can be selectively isolated from other portions of the firmware. This permits the virtual input/output subsystem to be disabled when severe errors occur involving virtual communication channels, without affecting other portions and functions of the firmware. Check-stopping the virtual I/O subsystem can be performed using existing hardware mechanisms for handling permanent errors including channel report words (CRW), channel control block (CHCB), and the like. The subsystem can be reactivated in response to a firmware patch which can be an automated or manual procedure.