Toward a reverse splice()
Toward a reverse splice()
[Kernel] Posted May 1, 2019 16:06 UTC (Wed) by corbet
The splice() system call is, at its core, a write operation; it attempts to implement zero-copy I/O by moving pages from a pipe to a file. At the 2019 Linux Storage, Filesystem, and Memory-Management Summit, Miklos Szeredi described a nascent idea for rsplice() — a "reverse splice" system call. There were not a lot of definitive outcomes from this discussion, but one thing was clear: rsplice() needs a much better description (and some code posted) before the development community can begin to form an opinion on it.