发明授权
- 专利标题: Reserved device access contention reduction
- 专利标题(中): 保留设备访问争用减少
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申请号: US12030961申请日: 2008-02-14
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公开(公告)号: US07908403B2公开(公告)日: 2011-03-15
- 发明人: Mark P Bendyk , Daniel F Casper , John R. Flanagan , Clint A. Hardy , Roger G. Hathorn , Catherine C. Huang , Matthew L. Kalos , Louis W. Ricci , Gustav E. Sittmann , Harry M. Yudenfriend
- 申请人: Mark P Bendyk , Daniel F Casper , John R. Flanagan , Clint A. Hardy , Roger G. Hathorn , Catherine C. Huang , Matthew L. Kalos , Louis W. Ricci , Gustav E. Sittmann , Harry M. Yudenfriend
- 申请人地址: US NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: US NY Armonk
- 代理机构: Cantor Colburn LLP
- 代理商 John Campbell
- 主分类号: G06F3/00
- IPC分类号: G06F3/00
摘要:
A computer program product, an apparatus, and a method for reducing reserved device access contention at a control unit in communication with a plurality of operating systems via one or more channels are provided. The computer program product includes a tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method that includes receiving a command message at the control unit from a first operating system, including an I/O operation command for a device. A device busy indicator is received, indicating that a second operating system has reserved the device. The command message is queued on a device busy queue in response to the device busy indicator. The control unit monitors for a device end indicator. The device busy queue is serviced to perform the I/O operation command in response to the device end indicator.
公开/授权文献
- US20090210583A1 RESERVED DEVICE ACCESS CONTENTION REDUCTION 公开/授权日:2009-08-20
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