eichelbe@nadc.arpa (02/09/86)
Is System V version 2 release 2 for VAX computers a virtual memory operating system, similar to Berkeley 4.1/4.2 UNIX systems for VAX computers? I was under the impression that it was a virtual memory OS, but some people say it isn't so. What's the poop? Thanks. Jon Eichelberger eichelbe@NADC.ARPA
gwyn@brl-smoke.ARPA (Doug Gwyn ) (02/09/86)
> Is System V version 2 release 2 for VAX computers a virtual memory > operating system, similar to Berkeley 4.1/4.2 UNIX systems for VAX > computers? I was under the impression that it was a virtual memory OS, > but some people say it isn't so. What's the poop? UNIX System V Release 2.0, Version 2 for DEC VAX does indeed support demand-paged virtual memory. The design of the memory manager is better than in 4.2BSD, although it isn't as machine-independent as it should have been, according to porters. There is at least one known bug in the paging code, so make sure you get support! (To forestall jeering from the Berkeley folks, were you aware that 4.1BSD wasted half its paging disk space?) This version of the system also includes enhancements to "f77". It is probably the last AT&T release for the VAX. Perhaps DEC will pick up the dropped ball.