发明授权
US5613086A Method and system for locking a page of real storage using a virtual
address
失效
使用虚拟地址锁定实际存储页面的方法和系统
- 专利标题： Method and system for locking a page of real storage using a virtual address
- 专利标题（中）： 使用虚拟地址锁定实际存储页面的方法和系统
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申请号： US567861申请日： 1995-12-06
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公开(公告)号： US5613086A公开(公告)日： 1997-03-18
- 发明人: Jeffrey A. Frey , David C. Manners , Jeffrey M. Nick
- 申请人： Jeffrey A. Frey , David C. Manners , Jeffrey M. Nick
- 申请人地址： 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： NY Armonk
- 主分类号： G06F12/08
- IPC分类号： G06F12/08 ; G06F12/10 ; G06F12/12 ; G06F12/14
摘要：
A LOCK PAGE instruction is provided for locking a page of real storage using a virtual address. The LOCK PAGE instruction includes an operation code which specifies the operation to be performed, a first operand which contains the value of the real address obtained during execution of the LOCK PAGE instruction and a second operand which contains the value of the virtual address of the page to be locked during execution of LOCK PAGE. LOCK PAGE enables an address page or a data page to be locked without requiring the entire address space to be locked. A page is locked when a lock control bit in general register 0 is zero, the page is valid in main storage and a lock bit located in a page table entry is zero. In addition to the above, the technique used by an operating system service for reclaiming a page of real storage is altered to intersect with the LOCK PAGE facility.
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