No, neither guest support nor host exploitation is included in current versions of z/VM.
- Bill Holder, z/VM Development, IBM On Fri, 30 Oct 2009 15:36:52 -0400, Neale Ferguson <[email protected]> wrote: >Can guests use it under z/VM? > > >On 10/30/09 3:33 PM, "Alan Altmark" <[email protected]> wrote: > >> No, you cannot persuade z/VM to use enhanced DAT ("EDAT"). >> >> Another religious war in the offing. One of the ways EDAT improves >> performance is by eliminating page tables (leaving more room in the ca che >> for Good Things) and speeding up the address translation process. All >> "pages" are 1MB (the size of a segment). When paging, that means you have >> to swap 256 4K pages at once, and they have to be contiguous in real >> memory. So while you get some good benefits, memory fragmentation can >> create significant pain.
