Virtual memory implementation in S/370

2006-05-15 Thread glen herrmannsfeldt
(I wrote) VAX uses a two level system where page tables are paged. There is kernel space, which isn't paged and holds the first level tables referencing pagable second level tables. z/Archtecture has three levels. (someone else wrote) Actually, z/Architecture has 5 levels. So far, the

Virtual memory implementation in S/370 (a.f.c x-post)

2006-05-12 Thread Richard Corak
The recent thread about virtual memory sparked a (kind of) idle question: why did the implementation in the S/370 have a two-level scheme (segment and page)? My original thought was that it facilitated definition of discontiguous parts of an address space. Well, mostly it is because smaller

Virtual memory implementation in S/370 (a.f.c x-post)

2006-05-11 Thread glen herrmannsfeldt
Marten Kemp [EMAIL PROTECTED] writes: The recent thread about virtual memory sparked a (kind of) idle question: why did the implementation in the S/370 have a two-level scheme (segment and page)? My original thought was that it facilitated definition of discontiguous parts of an address

Re: Virtual memory implementation in S/370 (a.f.c x-post)

2006-05-11 Thread Alan Ackerman
On Thu, 11 May 2006 11:08:56 -0700, glen herrmannsfeldt [EMAIL PROTECTED] .edu wrote: Marten Kemp [EMAIL PROTECTED] writes: The recent thread about virtual memory sparked a (kind of) idle question: why did the implementation in the S/370 have a two-level scheme (segment and page)? My original

Virtual memory implementation in S/370 (a.f.c x-post)

2006-05-10 Thread Anne Lynn Wheeler
Marten Kemp [EMAIL PROTECTED] writes: The recent thread about virtual memory sparked a (kind of) idle question: why did the implementation in the S/370 have a two-level scheme (segment and page)? My original thought was that it facilitated definition of discontiguous parts of an address

Virtual memory implementation in S/370 (a.f.c x-post)

2006-05-10 Thread Anne Lynn Wheeler
. re: http://www.garlic.com/~lynn/2006i.html#22 virtual memory http://www.garlic.com/~lynn/2006i.html#23 Virtual memory implementation in S/370 i had also done page migration as well as table migration ... which were released in my resource manager product ... the blue letter product announcement