Page invalidation processing with setting of storage key to predefined value
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United States of America Patent
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Apr 5, 2016
Grant Date -
Aug 9, 2012
app pub date -
Apr 20, 2012
filing date -
Dec 14, 2009
priority date (Note) -
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Abstract
A method is provided for facilitating processing within a multiprocessor computer system by: setting, in association with invalidate page table entry processing, a storage key at a matching location in central storage of a multiprocessor computer system to a predefined value; and subsequently executing a request to update the storage key to a new storage key, the subsequently executing including determining whether the predefined value is an allowed stale value, and if so, replacing in central storage the storage key of predefined value with the new storage key without requiring purging or updating of the storage key in any local processor cache of the multiprocessor computer system, thus minimizing interprocessor communication pursuant to processing of the request to update the storage key to the new storage key.
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