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

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

2005-08-16

2005-08-16

Myers, Paul R. (Department: 2111)

Electrical computers and digital data processing systems: input/

Access arbitrating

C710S244000, C710S113000, C711S203000, C711S205000, C711S207000

Reexamination Certificate

active

06931471

ABSTRACT:
A computer system has physical pages of memory subject to access by input/output (“I/O”) devices, and a certain table with entries associating the physical pages with the I/O devices. Responsive to a request for data be moved from a first physical page to a second physical page, an entry is selected for the first physical page in the table. The selected entry indicates an association of the first physical page and one of the I/O devices. Arbitration is temporarily disabled for the selected I/O device so that I/O operations for the I/O device are temporarily disabled. Once arbitration is disabled for the device the data is moved from the first physical page to a second one of the physical pages and the entry is updated in the table to reflect a new association between the I/O device and the second physical page.

REFERENCES:
patent: 6112286 (2000-08-01), Schimmel et al.
patent: 6128684 (2000-10-01), Okayama
patent: 6182168 (2001-01-01), Guthrie
patent: 6725284 (2004-04-01), Arndt
patent: 6741258 (2004-05-01), Peck et al.

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