For one thing, if a page has not been modified since it was paged in, and it's slot on backing store has not been reused, it can be assigned to another address space without first writing it to disk. I believe this is called "page-stealing".
On Mon, Jul 2, 2012 at 10:14 AM, Edward Jaffe <[email protected]>wrote: > On 7/1/2012 7:03 PM, Alex Kodat wrote: > >> Sorry but I don't understand what re-entrancy has to do with how storage >> is >> backed. >> Care to explain? >> > > I was referring to the practice of using GETMAIN to acquire working storage > areas. This technique is most often employed by RENT programs. > > > >> Also, I assume by "have no control over the backing of storage" you meant >> that >> most older programs don't specify the required backing for their GETMAIN? >> > > No. I meant that programs don't have control over where the storage, into > which > they are loaded by the contents supervisor, is backed. > > > -- > Edward E Jaffe > Phoenix Software International, Inc > 831 Parkview Drive North > El Segundo, CA 90245 > 310-338-0400 x318 > [email protected] > http://www.phoenixsoftware.**com/ <http://www.phoenixsoftware.com/> > -- OREXXMan
