Date: Thu, 25 May 2000 00:19:54 +0900 From: Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp> To: Chuck Paterson <cp@bsdi.com> Cc: arch@freebsd.org, yokota@zodiac.mech.utsunomiya-u.ac.jp Subject: Re: Preemptive kernel on older X86 hardware Message-ID: <200005241519.AAA20525@zodiac.mech.utsunomiya-u.ac.jp> In-Reply-To: Your message of "Wed, 24 May 2000 08:46:03 CST." <200005241446.IAA05589@berserker.bsdi.com> References: <200005241446.IAA05589@berserker.bsdi.com>
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[...] >Neither the 386 nor the 486 have a processor priority register or >cycle counters. Currently the BSD/OS SMPng kernel requires both of >these. There already exists some left over code to deal with not >having a cycle counter. Doing a casual inspection there really >doesn't seem to be anything too ugly in making the system run >without these when there is only a single processor. 386 and 486 do not support multi-processor configuration, don't they? Kazu To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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