Re: [Xen-devel] [PATCH] xen/tmem: Don't use map_domain_page for long-life-time pages.

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Thu, 2013-06-13 at 14:49 +0100, Jan Beulich wrote:
> >>> On 13.06.13 at 15:24, George Dunlap <george.dunlap@xxxxxxxxxxxxx> wrote:
> > Did I understand correctly that the map_domain_page() was required on 
> >  >5TiB systems, presumably because of limited virtual address space?  In 
> > which case this code will fail on those systems?
> > 
> > If that is the case, then we need to have a way to make sure tmem cannot 
> > be enabled on such systems.
> 
> Tmem is full of assumptions that all memory is mapped, and hence
> one of the requirements here was to disable tmem when that
> assumption is not true (until eventually tmem would get fixed).

Isn't this change moving it further away from that fixed state though?

Ian.


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