[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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

On 13/06/13 14:55, Ian Campbell wrote:
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?

Perhaps, but it's probably the best change for 4.3 at this point.


Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.