Andy Lutomirski wrote: <snip> > There should be a number measured in, say, nanoseconds in here > somewhere. The actual extent of the speedup is unmeasurable here. > Also, it's worth reading at least one of Linus' many rants about > zero-copy. It's not an automatic win.
It's well-understood that it's not an automatic win; significant testing on multiple architectures indicated that 512K is a surprisingly universal crossover point. The userspace code, therefore, switches from copying (normal kdbus parameters) to zero-copy (memfds) right around there. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
