Re: [patch 1/3] mmu_notifier: Core code

[Robin Holt <holt@sgi.com>]

On Thu, Jan 31, 2008 at 07:58:40PM -0800, Christoph Lameter wrote:
> On Thu, 31 Jan 2008, Robin Holt wrote:
> 
> > > +	void (*invalidate_range_end)(struct mmu_notifier *mn,
> > > +				 struct mm_struct *mm, int atomic);
> > 
> > I think we need to pass in the same start-end here as well.  Without it,
> > the first invalidate_range would have to block faulting for all addresses
> > and would need to remain blocked until the last invalidate_range has
> > completed.  While this would work, (and will probably be how we implement
> > it for the short term), it is far from ideal.
> 
> Ok. Andrea wanted the same because then he can void the begin callouts.
> 
> The problem is that you would have to track the start-end addres right?

Yep.  We will probably no do that in the next week, but I would expect
we have that working before we submit xpmem again.  We will probably
just chain them up in a regular linked list.

Thanks,
Robin