Article View: comp.sys.intel
Article #1550Re: Copy-on-write
From: Ken Shoemaker ~
Date: Mon, 24 Nov 1986 21:15
Date: Mon, 24 Nov 1986 21:15
21 lines
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1689 bytes
In article <362@prairie.UUCP> dan@prairie.UUCP (Daniel M. Frank) writes:
> If you don't have per-segment page tables, then you don't have hardware
>support for copy-on-write of pages, only segments. I consider this a
>pretty serious deficiency.
now this I don't understand. The segmentation translates the segment/
offset pair into a 32-bit offset into linear address space while the
paging hardware translates the 32-bit linear address into a 32-bit
physical address. Maybe I'm dense, but I don't see why you need to
have a page table per segment to support copy on write pages using
this scheme...
--
The above views are personal.
The primary reason innumeracy is so pernicious is the ease with which numbers
are invoked to bludgeon the innumerate into dumb acquiescence.
- John Allen Paulos
Ken Shoemaker, Microprocessor Design, Intel Corp., Santa Clara, California
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arc1-ca.pugleaf.net!utzoo!mnetor!seismo!lll-crg!styx!ames!oliveb!intelca!mipos3!kdsReferences:
<110@wldrdg.UUCP> <13772@amdcad.UUCP> <111@wldrdg.UUCP> <13801@amdcad.UUCP> <2971@rsch.WISC.EDU> <265@mipos3.UUCP> <362@prairie.24 Nov 86 21:15:35 GMTShow Full Headers
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!lll-crg!styx!ames!oliveb!intelca!mipos3!kds From: kds@mipos3.UUCP (Ken Shoemaker ~) Newsgroups: comp.sys.intel Subject: Re: Copy-on-write Message-ID: <271@mipos3.UUCP> Date: Mon, 24-Nov-86 16:15:35 EST Article-I.D.: mipos3.271 Posted: Mon Nov 24 16:15:35 1986 Date-Received: Tue, 25-Nov-86 07:11:26 EST References: <110@wldrdg.UUCP> <13772@amdcad.UUCP> <111@wldrdg.UUCP> <13801@amdcad.UUCP> <2971@rsch.WISC.EDU> <265@mipos3.UUCP> <362@prairie.24 Nov 86 21:15:35 GMT Reply-To: kds@mipos3.UUCP (Ken Shoemaker ~) Distribution: na Organization: Intel, Santa Clara, CA Lines: 21