Patent ID: 8621120
Filing Date: 2013-12-31
Classification: G06F

Abstract:
1. A computer implemented method for selectively stalling direct memory access (DMA) operations, the computer implemented method comprising: examining a migration in progress (MIP) bit in a translation control entry (TCE) holding register that is set to a value to indicate whether a page address in the TCE is associated with a physical page in migration; determining, based on the value of the MIP bit, whether a page address referenced in a TCE table corresponds with a physical page being migrated to another location in a system memory; and stalling, only for the physical page being migrated, all DMA operations from an input/output (I/O) adapter corresponding only to the physical page being migrated, responsive to the value of the MIP bit being set to indicate that the physical page being migrated corresponds to the referenced page address in the TCE.