> According to Linus Torvalds:
> > No. sendfile() was designed to do the right thing wrt nonblocking
> > writes, so you can have a select() loop with sendfile() the same way
> > you'd have it with read()+write().
>
> Would you mean "the right thing wrt nonblocking _reads_", by any chance?
Nope, sendfile() always reads from the page cache, so the reads are never
non-blocking. Obviously for a web server you'd do non-blocking reads too
(to get the commands from the client), but sendfile() itself is not
implicated in that end..
Linus
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