Can guests use it under z/VM?
On 10/30/09 3:33 PM, "Alan Altmark" <alan_altm...@us.ibm.com> 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 cache
> 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.
