On 8 June 2014 15:53, erik quanstrom <quanstro@quanstro.net> wrote:

> i was experimenting a bit with cinap's version of dropping duppage, and for
> the lame build the kernel tests there's quite a bit more i/o
>

that doesn't make any sense. duppage copied the page the wrong way round
(used the image page and put another copy in).
eliminating duppage simply copies the page from the image cache instead of
using that page. there isn't any i/o in either case.