William E Sherman

US Patent:

6345295, Feb 5, 2002

Filed:

Jan 22, 1999

Appl. No.:

09/235303

Inventors:

Brent Cameron Beardsley - Tucson AZ
Carl Evan Jones - Tucson AZ
William Griswold Sherman - Tucson AZ
Joe Edward Smothers - Tucson AZ

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1338

US Classification:

709224, 709223, 709106, 709227, 714 38, 714 45, 714 35, 717 4

Abstract:

A trace facility for a computer system attachment network, a method for operating that network, and trace tools in the network. The network has a plurality of the trace tools, each connected to a communication path, the trace facility providing a system wide trace. The trace facility comprises at least one trace buffer at each trace tool. Each trace tool has an address filter selecting an address range of information on the bus, the information being communicated on the bus as events, and storing the selected event information in the trace buffers, thereby conducting a trace. A breakpoint connection is provided interconnecting each of the trace tools. A trace tool control at each trace tool responds to a trace stop command addressed to the trace tool, to stop the trace at its address filter and trace buffer, and to issue a breakpoint signal on the breakpoint connection to all the interconnected trace tools. The interconnected trace tools respond to the breakpoint signal to stop the trace thereat, so that the trace is saved at each trace tool. An elapse clock provides a time stamp for each traced event to allow determination of the timing of each event.

US Patent:

7302546, Nov 27, 2007

Filed:

Jan 9, 2004

Appl. No.:

10/754139

Inventors:

Yu-Cheng Hsu - Tucson AZ, US
John Norbert McCauley - Tucson AZ, US
Cheng-Chung Song - Tucson AZ, US
William Griswold Sherman - Tucson AZ, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 12/00

US Classification:

711203, 711 1, 711 6, 713 1, 713 2

Abstract:

Provided are a method, system, and article of manufacture, wherein in certain embodiments, a plurality of logical memory blocks corresponding to a memory in a computational device are allocated. An attribute is associated with at least one logical memory block, wherein the attribute indicates whether the at least one logical memory block can be swapped from the memory, and wherein physical blocks corresponding to the at least one logical memory block are contiguous.

US Patent:

7487403, Feb 3, 2009

Filed:

Nov 12, 2004

Appl. No.:

10/987572

Inventors:

Yu-Cheng Hsu - Tucson AZ, US
John Norbert McCauley - Tucson AZ, US
William Griswold Sherman - Tucson AZ, US
Cheng-Chung Song - Tucson AZ, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 11/00

US Classification:

714 44

Abstract:

Provided is a method for handling a fabric failure. A module intercepts a signal indicating a failure of a path in a fabric providing a connection to a shared device. The module generates an interrupt to a device driver in an operating system providing an interface to the shared device that is inaccessible due to the path failure. The device driver requests information from the module on a status of a plurality of devices that are not accessible due to the path failure and receives information indicating the inaccessible device. The device driver reconfigures to discontinue use of the inaccessible device.

US Patent:

7584271, Sep 1, 2009

Filed:

Jan 7, 2004

Appl. No.:

10/752632

Inventors:

Yu-Cheng Hsu - Tucson AZ, US
John Norbert McCauley - Tucson AZ, US
Cheng-Chung Song - Tucson AZ, US
William Griswold Sherman - Tucson AZ, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 15/177

US Classification:

709220, 713 2

Abstract:

A determination is made as to whether a configuration indicator associated with a resource indicates a delayed configuration of the resource, wherein the resource is shared by a plurality of processing complexes via a bus, and wherein if the delayed configuration of the resource is indicated then the resource is prevented from being configured during initial program loads of the plurality of processing complexes. The resource is configured by only one of the of plurality of processing complexes that shares the resource, in response to determining that the configuration indicator associated with the resource indicates the delayed configuration of the resource.

US Patent:

7676558, Mar 9, 2010

Filed:

Nov 12, 2004

Appl. No.:

10/987381

Inventors:

Timothy Roy Block - Rochester MN, US
Yu-Cheng Hsu - Tucson AZ, US
John Norbert McCauley - Tucson AZ, US
Sean Patrick Riley - Tucson AZ, US
William Griswold Sherman - Tucson AZ, US
Cheng-Chung Song - Tucson AZ, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 15/13

US Classification:

709222, 709220, 709221, 709228, 709231, 709250, 370254, 370255, 710 8, 710 10

Abstract:

Provided are a method, system, and program for configuring shared devices over a fabric. A module in a first processing complex configures a first part of a fabric enabling communication with a set of devices accessible through the first part of the fabric. The module detects a located device accessible through a second part of the fabric, wherein a second processing complex is designated to configure the second part of the fabric and the located device. The module determines whether the second processing complex is available in response to detecting the uninitialized device. The module passes to a device driver in the first processing complex an uninitialized property for the located device. The device driver requests the module to configure the second part of the fabric to enable access to the located device over the second part of the fabric in response to determining that the located device has the uninitialized property.

US Patent:

7676645, Mar 9, 2010

Filed:

Oct 19, 2007

Appl. No.:

11/875679

Inventors:

Yu-Cheng Hsu - Tucson AZ, US
John Norbert McCauley - Tucson AZ, US
Cheng-Chung Song - Tucson AZ, US
William Griswold Sherman - Tucson AZ, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 12/00
G06F 12/02
G06F 21/00
G06F 13/00
G06F 13/28
G06F 9/26
G06F 9/34
G06F 9/00
G06F 9/24
G06F 15/177
G06F 1/24

US Classification:

711203, 711 1, 711 6, 711104, 711165, 711170, 711171, 711172, 711173, 711209, 713 1, 713 2

Abstract:

Provided are a method, system, and article of manufacture, wherein in certain embodiments, a plurality of logical memory blocks corresponding to a memory in a computational device are allocated. An attribute is associated with at least one logical memory block, wherein the attribute indicates whether the at least one logical memory block can be swapped from the memory, and wherein physical blocks corresponding to the at least one logical memory block are contiguous.

US Patent:

7774656, Aug 10, 2010

Filed:

Jan 7, 2009

Appl. No.:

12/350189

Inventors:

Yu-Cheng Hsu - Tucson AZ, US
John Norbert McCauley - Tucson AZ, US
William Griswold Sherman - Tucson AZ, US
Cheng-Chung Song - Tucson AZ, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 11/00

US Classification:

714 44

Abstract:

Provided are a method, system, and program for handling a fabric failure. A module intercepts a signal indicating a failure of a path in a fabric providing a connection to a shared device. The module generates an interrupt to a device driver in an operating system providing an interface to the shared device that is inaccessible due to the path failure. The device driver requests information from the module on a status of a plurality of devices that are not accessible due to the path failure and receives information indicating the inaccessible device. The device driver reconfigures to discontinue use of the inaccessible device.

US Patent:

8028189, Sep 27, 2011

Filed:

Nov 17, 2004

Appl. No.:

10/991207

Inventors:

Yu-Cheng Hsu - Tucson AZ, US
John N. McCauley - Tucson AZ, US
Juan J. Ruiz - Tucson AZ, US
William G. Sherman - Tucson AZ, US
Cheng-Chung Song - Tucson AZ, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 11/00

US Classification:

714 5

Abstract:

A technique for handling hardware errors in a computing system, such as a data storage facility, while avoiding a system crash. An interface is registered with an operating system of the computing system to process hardware errors. When a hardware error is detected, the interface checks an error register to identify the adapter that likely causes the error, and quarantines, e. g. , blocks off, the offending adapter from the computing system. The interface then notifies the operating system that the error has been handled, thereby causing the operating system to bypass a system crash that would otherwise occur. The interface can be provided as a kernel extension of a device driver associated with the operating system.