Input/output (I/O) processing via a page fault doorbell mechanism
US9424114B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 13, 2014 |
| Grant date | Aug 23, 2016 |
| Priority date | — |
| Expiry date | Aug 28, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/1052
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods are disclosed for processing an input/output (I/O) operation. An example system includes a kernel interface that receives a notification of a page fault. The page fault is responsive to an application attempting to perform an operation on a memory region that is set to a first access mode. When the memory region is set to the first access mode, the application does not have permission to perform the operation on the memory region. The system also includes a handler that responsive to the notification (i) sets the memory region to a second access mode and (ii) spawns a kernel thread to drain data from the memory region. When the memory region is set to the second access mode, the application has permission to perform the operation on the memory region. The system further includes an I/O module that stores the data in the memory region for processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.