| 发明名称 |
EFFICIENT RECLAMATION OF PRE-ALLOCATED DIRECT MEMORY ACCESS (DMA) MEMORY |
| 摘要 |
For efficient reclamation of pre-allocated direct memory access (DMA) memory in a computing environment, hot-add random access memory (RAM) is emulated for a general purpose use by reclamation of pre-allocated DMA memory reserved at boot time by notifying a non-kernel use device user that the non-kernel use device has a smaller window, stopping and remapping to the smaller window, and notifying a kernel that new memory has been added, wherein the new memory is a region left after the remap. The hot-add RAM is split into at least two continuous parts. |
| 申请公布号 |
US2017123998(A1) |
申请公布日期 |
2017.05.04 |
| 申请号 |
US201715407368 |
申请日期 |
2017.01.17 |
| 申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
AKIRAV Shay H.;BAR Oren;BARSKY Roman;MAOZ Itay |
| 分类号 |
G06F12/1081;G06F9/44 |
主分类号 |
G06F12/1081 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method for efficient reclamation of pre-allocated direct memory access (DMA) memory using a processor device in a computing environment, the method comprising:
emulating a hot-add RAM for a general purpose use by reclamation of pre-allocated DMA memory reserved at boot time by notifying a non-kernel use device user that the non-kernel use device has a smaller window, stopping and remapping to the smaller window, and notifying a kernel that new memory has been added, wherein the new memory is a region left after the remap; and splitting the hot-add RAM into at least two continuous parts. |
| 地址 |
Armonk NY US |
