RE: OS Textbook FreeBSD Appendix

2002-01-30 Thread DOROVSKOY,IGOR (A-Portsmouth,ex1)
> Once again Unix actually used this, the DEC OSes did not, so Unix was the first to > find the bugs in this hardware too. I think the first sentence is not true. The RT-11 XM monitor uses the MMU hardware intensively even before Unix came to utilize it. I'm not talking about RSX-11, RSTS-E and

Re: OS Textbook FreeBSD Appendix

2002-01-30 Thread Ronald G Minnich
On Tue, 29 Jan 2002 [EMAIL PROTECTED] wrote: > As far as I remember from reading the Lyons' book, there were > 16 mapping descriptors for text and data each. I think, 1/16 > of the address space is not too big, and in absolute values > it's the size of today's pages (4KB). well I had dropped thi

Re: OS Textbook FreeBSD Appendix

2002-01-29 Thread babkin
"Justin C.Walker" wrote: > > On Monday, January 28, 2002, at 05:10 PM, Greg Shenaut wrote: > > >> I'd guess that the point deals with the use of "shared memory" between > >> processes for the purposes of sharing data. Given the granularity of > >> the PDP-11 "VM" hardware, it seemed like a bad

Re: OS Textbook FreeBSD Appendix

2002-01-29 Thread Andrew Boothman
Ronald G Minnich wrote: > >where'd they get this? that's an odd statement. Shared memory was used all >the time on Unix on -11s, that's the whole point of the shared text a.out >format. Of course shared read-only text is not exactly the standard shared >memory, but at the same time it shows feasi

Re: OS Textbook FreeBSD Appendix

2002-01-28 Thread Justin C . Walker
On Monday, January 28, 2002, at 05:10 PM, Greg Shenaut wrote: > In message <[EMAIL PROTECTED]>, "Justin > C.Walker" cleopede: I've took a brief look on Unix presentation and was wondering, why author says that "...most Unix systems have not permitted shared memory because the PDP

Re: OS Textbook FreeBSD Appendix

2002-01-28 Thread Greg Shenaut
In message <[EMAIL PROTECTED]>, "Justin C.Walker" cleopede: >>> I've took a brief look on Unix presentation and was wondering, why >>> author says that "...most Unix systems have not permitted shared >>> memory because the PDP-11 hardware did not encourage it..."? >> where'd they get this? that's

Re: OS Textbook FreeBSD Appendix

2002-01-28 Thread Justin C . Walker
On Monday, January 28, 2002, at 02:49 PM, Ronald G Minnich wrote: > On Mon, 28 Jan 2002, DOROVSKOY,IGOR (A-Portsmouth,ex1) wrote: > >> I've took a brief look on Unix presentation and was wondering, why >> author >> says that "...most Unix systems have not permitted shared memory >> because >>

RE: OS Textbook FreeBSD Appendix

2002-01-28 Thread Ronald G Minnich
On Mon, 28 Jan 2002, DOROVSKOY,IGOR (A-Portsmouth,ex1) wrote: > I've took a brief look on Unix presentation and was wondering, why author > says that "...most Unix systems have not permitted shared memory because > the PDP-11 hardware did not encourage it..."? where'd they get this? that's an od

RE: OS Textbook FreeBSD Appendix

2002-01-28 Thread DOROVSKOY,IGOR (A-Portsmouth,ex1)
Friday, January 25, 2002 7:52 PM To: [EMAIL PROTECTED] Subject: OS Textbook FreeBSD Appendix Hi all! Apologies if this is common knowledge, but I recently bought Operating System Concepts by Silberschatz, Galvin and Gagne (published by Wiley) for my Computer Science course and the book has seve

Re: OS Textbook FreeBSD Appendix

2002-01-28 Thread Adrian Filipi-Martin
On Sat, 26 Jan 2002, Andrew Boothman wrote: ... > appendices is all about FreeBSD and its internals. It's 48 pages long > and is available from > > http://www.wiley.com/college/silberschatz6e/0471417432/pdf/bsd.pdf > I like it. The dinosaur book has been a clasic forever. The appe

OS Textbook FreeBSD Appendix

2002-01-25 Thread Andrew Boothman
Hi all! Apologies if this is common knowledge, but I recently bought Operating System Concepts by Silberschatz, Galvin and Gagne (published by Wiley) for my Computer Science course and the book has several appendices which are available for download from Wiley's web site. One of these appendi