Re: [patch] 'virtual => physical page mapping cache',

[Alan Cox]

On Fri, 2002-09-27 at 18:53, Ingo Molnar wrote:
> 
> On Fri, 27 Sep 2002, Chris Wedgwood wrote:
> 
> > O_DIRECT is allow to break if someone does something silly :)  [...]
> 
> to DMA into a page that does not belong to the process anymore? I doubt
> that.

Try doing a truncate on a file as an O_DIRECT write is occuring.
Scribbling into pages you dont own is the least of your problems.