International Business Machines Corporation
Filesystem using hardware transactional memory on non-volatile dual in-line memory module

Abstract:

A computer-implemented method comprises receiving a request to write to a file and, in response to the request, determining that the file exists in a storage device. In response to the determination that the file exists, the method further comprises mapping the file into a region of a non-volatile dual in-line memory module (NVDIMM); initiating a transaction to write to the mapped file in the NVDIMM without acquiring a speculative lock on the mapped file; and determining whether a conflict occurred in writing to the mapped file in the NVDIMM. In response to a determination that a conflict occurred, the method comprises restarting the transaction to write to the mapped file in the NVDIMM without acquiring the speculative lock on the mapped file. In response to a determination that no conflict occurred, the method comprises committing changes made to the mapped file to the file in the storage device.