Re: posix_fallocate

[Robert Elz <kre%munnari.OZ.AU@localhost>]

    Date:        Sun, 17 Nov 2013 08:05:03 +0000
    From:        David Holland <dholland-tech%NetBSD.org@localhost>
    Message-ID:  <20131117080503.GB7874%netbsd.org@localhost>

  | I don't see how this is a DoS attack that e.g. dd if=/dev/urandom
  | of=/dev/null isn't.

To answer both you and the Mouse - the difference is that a user process
actually writing data consumes measurable resources, and thus is easy to
find and kill.   When everything happens in the kernel, spotting which
arrantly idle user process is making it happen is not at all easy.

kre