You can do this with large reads: read(fd, buf, 100 megs) can, in the kernel, do something like: read(fd, buf[0:first-page-boundary]) remap(fd

You can do this with large reads: read(fd, buf, 100 megs) can, in the kernel, do something like: read(fd, buf[0:first-page-boundary]) remap(fd, buf[first-page-boundary:last-page-boundary]) read(fd, buf[last-page-boundary:end]) There you go, zero copy reads. Or at least, minimal copy reads -- at most you will get 2 pages worth of copying.