DYNAMIC ALTERING OF SRIOV VIRTUAL FUNCTION (VF) RESOURCES INCLUDING DMA WINDOWS WITHOUT BRINGING DOWN THE VF

摘要

A method, system and computer program product are provided for implementing dynamic altering of a Single Root Input/Output Virtualization (SRIOV) virtual function (VF) resources including direct memory access (DMA) windows without bringing down the VF in a virtualized system. A request to alter VF resources is received, such as a dynamic request based on usage statistics or change in need of the user. Pending DMA requests are completed for the VF resources to be altered. Responsive to completing the DMA requests, new buffers are allocated for the resized DMA windows without bringing down the VF in a virtualized system.