Methods and apparatus for non-disruptive upgrade by...

Details Methods and apparatus for non-disruptive upgrade by... Methods and apparatus for non-disruptive upgrade by...

2011-02-15

2011-02-15

Hafiz, Tariq (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

Peripheral configuration

C710S015000, C710S062000

Reexamination Certificate

active

07890664

ABSTRACT:
Methods and apparatus for non-disruptive upgrade by redirecting I/O operations. With this arrangement, a driver upgrade does not require restarting an application. In one embodiment, a method includes installing on a computer a legacy upgrade module in a kernel having a legacy driver with first and second loadable extensions for handling input/output operations for applications to and from devices, retrieving and storing static configuration data from the legacy driver, transferring the stored static configuration data to a new driver, obtaining runtime device configuration data from the devices and transferring the runtime device configuration data to the new driver, and filtering device input/output operations such that prior to cutover input/output operations are directed by the LUM through device stacks for the legacy driver and after cutover input/output operations are directed to the new driver.

REFERENCES:
patent: 2007/0174849 (2007-07-01), Cheung et al.
Araki, Hitoshi, A Nonstop Updating Technique for Device Driver Programs on the IROS Platform, 2002, ieee.org [online, accessed on Dec. 16, 2010], URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=00525144.

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