Non-quiescing key setting facility
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United States of America Patent
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Aug 12, 2014
Grant Date -
Jun 16, 2011
app pub date -
Dec 15, 2009
filing date -
Dec 15, 2009
priority date (Note) -
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Abstract
A non-quiescing key setting facility is provided that enables manipulation of storage keys to be performed without quiescing operations of other processors of a multiprocessor system. With this facility, a storage key, which is accessible by a plurality of processors of the multiprocessor system, is updated absent a quiesce of operations of the plurality of processors. Since the storage key is updated absent quiescing of other operations, the storage key may be observed by a processor as having one value at the start of an operation performed by the processor and a second value at the end of the operation. A mechanism is provided to enable the operation to continue, avoiding a fatal exception.
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