On Tue, Sep 01, 2020 at 08:01:31PM +0100, Sami Kerola wrote: > A read() write() pair can be replaced with sendfile(), and it should be more > efficient than suffling bytes back and forth user and kernel space. What kinds of fds are this? If this involves things like a tty sendfile will probably stop working in Linux 5.10, as the kernel fallback is pretty horrible and not exactly more efficient. Sendfile also hasn't always been supported on all kinds of files, so you'll still always need a fallback.
