Input/Output completion system for a data processing platform

Details Input/Output completion system for a data processing platform Input/Output completion system for a data processing platform

2009-11-23

2010-10-19

Patel, Niketa I (Department: 2181)

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output data buffering

C710S056000

Reexamination Certificate

active

07818478

ABSTRACT:
A mechanism is disclosed for performing I/O operations using queue banks within a data processing system that supports multiple processing partitions. A queue bank is a re-useable area of memory allocated for performing I/O operations. All memory locking and address-translation functions are generally performed only once for a queue bank to reduce system overhead. After a queue bank has been used to perform an I/O operation, some processing is performed to make it available for re-use. This processing determines whether the queue bank contains memory that is being removed from a current processing partition. If so, a delay is imposed so that the queue bank is not made available for immediate re-use. This creates a window of time wherein all queue banks that contain the affected memory are inactive, thereby allowing the affected memory to be removed from the partition without halting on-going I/O activity.

REFERENCES:
patent: 6665601 (2003-12-01), Nielsen
patent: 7487319 (2009-02-01), Benhase et al.

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