Fast path userspace RDMA resource error detection
US9021148B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2013 |
| Grant date | Apr 28, 2015 |
| Priority date | — |
| Expiry date | Nov 15, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/545
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Mechanisms are provided for providing an early warning of an error state of a remote direct memory access (RDMA) resource to a userspace application. The mechanisms detect, using kernelspace logic, an error event having occurred, and perform a write operation to write an error state value to a userspace shared memory state data structure indicating the RDMA resource to be in an error state. The mechanisms detect, using userspace logic, the RDMA resource being in an error state by reading the error state value from the userspace shared memory state data structure in response to a userspace application attempting to perform a RDMA operation using the RDMA resource. In addition, the mechanisms initiate, by the userspace application, an operation to tear down the RDMA resource in response to detecting the RDMA resource being in the error state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.