Method, apparatus, and program product for facilitating...

Details Method, apparatus, and program product for facilitating... Method, apparatus, and program product for facilitating...

2007-04-03

2007-04-03

Park, Ilwoo (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output command process

C710S006000, C710S039000

Reexamination Certificate

active

10132340

ABSTRACT:
A serialization detection arrangement determines whether a received IO request requires serialization. An overlap detection arrangement then determines if the received IO request produces an impermissible overlap condition. Each IO request producing an impermissible overlap condition is blocked so that it cannot be executed by a storage device while the impermissible overlap condition exists. However, IO requests avoiding an impermissible overlap condition are passed on to the storage device to be executed at the device. Blocking or passing IO requests is preferably performed by an IO request control arrangement. Upon receipt of an IO done signal for a particular IO request, a completion arrangement starts any IO request that had been blocked by the particular IO request and updates the records for both pending requests requiring serialization and blocked IO requests.

REFERENCES:
patent: 5790868 (1998-08-01), Hotea et al.
patent: 6665738 (2003-12-01), Vishlitzky et al.

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