Data processing system and method using virtual storage system

Electrical computers and digital data processing systems: input/ – Interrupt processing

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Details

710260, 710261, 710262, 711200, 711202, 711210, 712244, G06F 946

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active

060386312

ABSTRACT:
In executing indivisible operations to be executed without being interrupted, pseudo-store instructions PST which do not perform data writing are used to perform a check for the presence or absence in a memory of pages necessary for execution of the indivisible operations. In the event of absence of the necessary pages, the necessary pages are pre-stored in the memory. This prevents the generation of page fault interruptions during the execution of an indivisible operation, thereby enabling the indivisible operation to be implemented on a software basis. A disable interrupt instruction is executed prior to the execution of the indivisible operation as required, and data indicating an address of the disable interrupt instruction is preserved in order to return to the disable interrupt instruction. In the case where an interruption, such as a page fault interruption, which cannot be disabled even in a interrupt disabled state is generated during data processing, processing is resumed from the disable interrupt instruction after the termination of processing for the interruption or an asynchronous interruption, with reference to the address.

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