> + /* > + * After at least one byte was read from the input > + * file, don't wait for blocking I/O in the following > + * loop iterations; instead of blocking for arbitrary > + * amounts of time in the kernel, let userspace decide > + * how to proceed. This avoids excessive latency if > + * the output is being consumed faster than the input > + * file can fill it (e.g. sendfile() from a slow hard > + * disk to a fast network). > + */ > + flags |= SPLICE_F_NOWAIT; > + Hm, so the thing that is worrysome about this change is that this may cause regressions afaict as this is a pretty significant change from current behavior.
