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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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