Re: [Lhms-devel] [PATCH 0/7] Fragmentation Avoidance V19

Dave Hansen
2005-11-07T11:01:13Z

On Mon, 2005-11-07 at 09:00 +0100, Ingo Molnar wrote:
> * Linus Torvalds <torvalds@osdl.org> wrote:
> > So remappable kernels are certainly doable, they just have more
> > fundamental problems than remappable user space _ever_ has. Both from
> > a performance and from a complexity angle.
>
> furthermore, it doesnt bring us any closer to removable RAM. The problem
> is still unsolvable (due to the 'how to do you find live pointers to fix
> up' issue), even if the full kernel VM is 'mapped' at 4K granularity.

I'm not sure I understand. If you're remapping, why do you have to find
live and fix up live pointers? Are you talking about things that
require fixed _physical_ addresses?

-- Dave