>>> On 21.08.17 at 20:05, <jgr...@suse.com> wrote: > Currently Linux has no support for grant v2 as this would reduce the > maximum number of active grants by a factor of 2 compared to v1, > because the number of possible grants are limited by the allowed number > of grant frames and grant entries of v2 need twice as much bytes as > those of v1. > > Unfortunately grant v2 is the only way to support either guests with > more than 16TB memory size or PV guests with memory above the 16TB > border, as grant v1 limits the frame number to be 32 bits wide. > > In order to remove the disadvantage of grant v2 this patch series > enables configuring different maximum grant frame numbers for v1 and > v2.
But that does imply higher memory footprint of such a guest in Xen, doesn't it? The limit, after all, is there to bound resource use of DomU-s. I wonder whether we shouldn't make any such increase dependent on first putting in place proper accounting of the memory used for individual domains. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
