公开(公告)号：US07908403B2

公开(公告)日：2011-03-15

申请号：US12030961

申请日：2008-02-14

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

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

IPC分类号： G06F3/00

CPC分类号： G06F13/122 ,  G06F9/50

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.

摘要翻译： 提供了一种用于在经由一个或多个通道与多个操作系统通信的控制单元处减少预留设备访问争用的计算机程序产品，装置和方法。 计算机程序产品包括可由处理电路读取的有形存储介质，并且存储用于由处理电路执行以执行包括从第一操作系统在控制单元处接收命令消息的方法的指令，该第一操作系统包括I / O操作命令 用于设备。 接收到设备忙指示符，指示第二操作系统已经预留了设备。 响应于设备忙指示灯，命令消息在设备忙碌队列中排队。 控制单元监视设备端指示器。 服务设备忙碌队列以响应设备结束指示符执行​​I / O操作命令。