As Tom Marchant has already pointed out, Hobart Spitz's view of page stealing is mistaken.
Perhaps even more important his view of how the ASM [Auxiliary Storage Manager] works is also mistaken. No page that has not been modified is paged out. (One of the minor but important merits of reentrant coding is/was that by segregating never paged-out code pages and frequently paged-out data pages it reduces paging overheads significantly.) His post did have the virtue of reviving the [predominantly British] term 'backing store' which has always seemed to be to be a very good, self-descriptive one, the wider of which is now unfortunately all but precluded by other, different and preemptive, uses of the too similar term 'backing storage'. John Gilmore, Ashland, MA 01721 - USA
