NetBSD Problem Report #36163

From  Tue Apr 17 11:44:52 2007
Return-Path: <>
Received: from ( [])
	by (Postfix) with ESMTP id B292763B964
	for <>; Tue, 17 Apr 2007 11:44:52 +0000 (UTC)
Message-Id: <>
Date: Tue, 17 Apr 2007 12:44:51 +0100
Sender: Andrew Doran <>
Subject: I386_CPU is obsolete and should be removed
X-Send-Pr-Version: 3.95

>Number:         36163
>Category:       port-i386
>Synopsis:       I386_CPU is obsolete and should be removed
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    ad
>State:          closed
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Tue Apr 17 11:45:00 +0000 2007
>Closed-Date:    Thu Nov 15 19:26:28 +0000 2007
>Last-Modified:  Thu Nov 15 19:26:28 +0000 2007
>Originator:     Andrew Doran
>Release:        NetBSD 4.99.17
The NetBSD Project
Architecture: i386
[Resending - the web form ate my earlier PR]

The I386_CPU option is obsolete and should be removed. In brief:

- It hasn't worked properly for some time. We shouldn't be advertising
  features that we cannot support.

- It adds code complexity and maintenance overhead in a number of areas. If
  nothing else, we should be able to rely on features that x86 CPUs have been
  providing for nearly 20 years like: cmpxchg, xadd, invlpg.

- The 80386 was mostly overlooked by users, who skipped it and got 486 class
  machines. The majority of the machines out there are severely underpowered
  and are better served by a comtemporary operating system like MS-DOS or
Code inspection, common sense.
- Remove the option.
- Update documentation.
- Announce its removal.



Responsible-Changed-From-To: port-i386-maintainer->ad
Responsible-Changed-When: Sun, 27 May 2007 22:32:48 +0000
I'm working on it.

From: Andrew Doran <>
Subject: PR/36163 CVS commit: src/sys/arch
Date: Thu, 15 Nov 2007 19:18:35 +0000 (UTC)

 Module Name:	src
 Committed By:	ad
 Date:		Thu Nov 15 19:18:35 UTC 2007

 Modified Files:
 	src/sys/arch/amd64/amd64: trap.c
 	    INSTALL_TINY files.i386
 	src/sys/arch/i386/i386: copy.S identcpu.c trap.c
 	src/sys/arch/x86/include: cpufunc.h pmap.h
 	src/sys/arch/xen/conf: files.xen
 	src/sys/arch/xen/i386: identcpu.c locore.S pmap.c trap.c
 	src/sys/arch/xen/include: pmap.h

 Log Message:
 Remove support for 80386 level CPUs. PR port-i386/36163.

 To generate a diff of this commit:
 cvs rdiff -r1.35 -r1.36 src/sys/arch/amd64/amd64/trap.c
 cvs rdiff -r1.140 -r1.141 src/sys/arch/i386/conf/ALL
 cvs rdiff -r1.48 -r1.49 src/sys/arch/i386/conf/GENERIC_PS2TINY
 cvs rdiff -r1.108 -r1.109 src/sys/arch/i386/conf/GENERIC_TINY
 cvs rdiff -r1.137 -r1.138 src/sys/arch/i386/conf/INSTALL_SMALL
 cvs rdiff -r1.114 -r1.115 src/sys/arch/i386/conf/INSTALL_TINY
 cvs rdiff -r1.320 -r1.321 src/sys/arch/i386/conf/files.i386
 cvs rdiff -r1.8 -r1.9 src/sys/arch/i386/i386/copy.S
 cvs rdiff -r1.82 -r1.83 src/sys/arch/i386/i386/identcpu.c
 cvs rdiff -r1.223 -r1.224 src/sys/arch/i386/i386/trap.c
 cvs rdiff -r1.2 -r1.3 src/sys/arch/x86/include/cpufunc.h
 cvs rdiff -r1.3 -r1.4 src/sys/arch/x86/include/pmap.h
 cvs rdiff -r1.68 -r1.69 src/sys/arch/xen/conf/files.xen
 cvs rdiff -r1.16 -r1.17 src/sys/arch/xen/i386/identcpu.c
 cvs rdiff -r1.34 -r1.35 src/sys/arch/xen/i386/locore.S
 cvs rdiff -r1.35 -r1.36 src/sys/arch/xen/i386/pmap.c
 cvs rdiff -r1.19 -r1.20 src/sys/arch/xen/i386/trap.c
 cvs rdiff -r1.13 -r1.14 src/sys/arch/xen/include/pmap.h

 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.

State-Changed-From-To: open->closed
State-Changed-When: Thu, 15 Nov 2007 19:26:28 +0000


NetBSD Home
NetBSD PR Database Search

(Contact us) $NetBSD: query-full-pr,v 1.39 2013/11/01 18:47:49 spz Exp $
$NetBSD:,v 1.8 2006/05/07 09:23:38 tsutsui Exp $
Copyright © 1994-2007 The NetBSD Foundation, Inc. ALL RIGHTS RESERVED.