Boots – shoes – and leggings
Patent
1984-12-28
1987-06-16
Shaw, Gareth D.
Boots, shoes, and leggings
371 16, 371 20, G06F 944, G06F 1100
Patent
active
046740384
ABSTRACT:
The invention disclosed and claimed herein provides a method for a virtual machine, which maps to the V=R region of a host machine's address space, to resume program execution successfully when the host operating system terminates and subsequently restarts successfully after the occurrence of a system incident. The system incident brings the computer system down, but with a reasonable chance that the system will be able to bounce. A bounce occurs when the host operating system nucleus is reinitialized or refreshed. The virtual machine will be allowed to survive the system incident as long as its integrity can be maintained, i.e. as long as its status and in-progress work can be preserved. The status and in-progress work of the virtual machine is preserved in a reserved region of host storage in such a way that the time to save and restore virtual machine status is reduced, I/O that might cause further system incidents are avoided and the complexity of restoration of the virtual machine during a system incident is reduced.
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Reynolds, V=R Virtual Machine Recovery/Survival, IBM Technical Disclosure Bulletin, vol. 25, 113, Apr. 83, pp. 6278-6279.
Brelsford David P.
Cerutti Daniel D.
Coleman Leslie S.
Czak Lynn A.
Davison Gerald A.
Biela Joseph A.
International Business Machines - Corporation
Lacasse Randy W.
Shaw Gareth D.
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