Re: [PATCH 03/35] xen: document Xen is using an unused bit for the pagetables

Andrea Arcangeli
2012-05-26T16:00:09Z

Hi Konrad,

On Fri, May 25, 2012 at 04:26:56PM -0400, Konrad Rzeszutek Wilk wrote:
> On Fri, May 25, 2012 at 07:02:07PM +0200, Andrea Arcangeli wrote:
> > Xen has taken over the last reserved bit available for the pagetables
> > which is set through ioremap, this documents it and makes the code
> > more readable.
>
> Andrea, my previous respone had a question about this - was wondering
> if you had a chance to look at that in your busy schedule and provide
> some advice on how to remove the _PAGE_IOMAP altogether?

I read you response but I didn't look into the P2M tree and
xen_val_pte code yet sorry. Thanks for looking into this, if it's
possible to remove it without downsides, it would be a nice
cleanup. It's not urgent though, we're not running out of reserved
pte bits yet :).