On Tue, 10 Feb 2009 09:04:51 -0500, Martin, Terry R. (CMS/CTR) (CTR) <[email protected]> wrote:
... > 2) I believe that some of the paging slots >are old data in other words the pages are not going away after a task is >complete how can I research this. The Linux guests have not been >recycled but I thought if they had allocated the slots that after a task >within the Linux guest completed that the slots would be reclaimed. > ... That's not necessarily true. When a Linux task completes, Linux does not necessarily inform CP that the link between Linux virtual and Linux real is broken and that any saved contents of the Linux real page can be discarde d. Even with CMM or CMMA enabled, Linux is not obligated to inform CP of ev ery page transition, and even when it does, CP may not "notice" a page is in a state where old contents (backed on CP paging DASD) can be discarded befo re Linux reuses it for some new mapping.
