Dong, Eddie
2005-Jun-14 03:01 UTC
RE: [Xen-devel] Review needed for "commonisation"ofcommon/grant_table.c
Magenheimer, Dan (HP Labs Fort Collins) wrote:> > I understand (I think) how it works on x86. But the memory > model is somewhat different on ia64. Domain 0 has access > to all of machine memory and can create a duplicate mapping > for any page of any unprivileged guest. This is not controlled > by Xen (in the current implementation).Doesn''t XEN/domain0 use ballon driver to give memory to HV and let HV memory system allocate for other domains? Or are you proposing a new XEN memory mechanism (can you share with us for the details so that we can be in same page if this is the case)? But anyway I don''t think IA64 has such kind of specials.> As long as a page > is shared between Domain 0 and Domain N, I don''t see that > reference counts are necessary.Don''t you want to keep the capability for the code coming soon?> > If pages are to be shared between two unprivileged domains, > there may be some value in reference counts. But that doesn''t > fit very well with the current frontend/backend model. >Eddie _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel