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SubjectRe: sendfile

> Sat, May 03, 2003 at 12:42:59AM +0000, Miquel van Smoorenburg wrote:
> > In article <20030502210648.GA5322@mark.mielke.cc>,
> > Mark Mielke <mark@mark.mielke.cc> wrote:
> > >One question it raises in my mind, is whether there would be value in
> > >improving write()/send() such that they detect that the userspace
> > >pointer refers entirely to mmap()'d file pages, and therefore no copy
> > >of data from userspace -> kernelspace should be performed.
> > You mean like
> >
> http://hypermail.idiosynkrasia.net/linux-kernel/archived/2003/week00/0056.html
>
> Yes, definately, and thank you for referring us to work that has already
> been done.
>
> mark

Does this mean that if you memory map a file and send it through TCP,
you'll have no copy operations transfering data from disk to NIC (except
the DMS transfers disk->memory and memory->NIC)?

Does there exist work implementing this also for UDP?

-ph
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