Dynamically allocating limited system memory for DMA among multiple adapters
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United States of America Patent
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-
Mar 13, 2012
Grant Date -
Dec 2, 2010
app pub date -
May 28, 2009
filing date -
May 28, 2009
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method, apparatus, and computer program product dynamically allocate limited system memory for direct memory access (DMA) among a plurality of input/output (I/O) adapters in a system partition. Initially a minimum entitlement of I/O entitled memory capacity is allocated to each of the respective multiple I/O adapters. The minimum entitlement enables operation of an I/O adapter driver. Additional entitlement of I/O entitled memory capacity is selectively allocated based upon I/O demands of each I/O adapter.
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