On Sunday 31 May 2009 17:24:03 Andries E. Brouwer wrote:
> On Sun, May 31, 2009 at 04:39:11PM +0200, Bartlomiej Zolnierkiewicz wrote:
> 
> [HPA stuff deleted]
> 
> Hi Bartlomiej,
> 
> Apart from HPA one also has DCO, which functions rather similarly.
> (I have not checked whether the current kernel knows anything about DCO.)
> Have you thought about DCO?
> Probably the kernel should by default not touch any such setting.
> Maybe it should be reported?
> A user space utility might change this setting - thus a disk can change size.

We leave DCO handling entirely to user-space currently.