Date: Sun, 1 Nov 1998 17:20:01 -0800 (PST) From: Peter Wemm <peter@netplex.com.au> To: freebsd-bugs@FreeBSD.ORG Subject: Re: kern/8532: 3.0-RELEASE panics with standard SMP kernel from /sys/i386/conf/SMP-GENERIC Message-ID: <199811020120.RAA26882@freefall.freebsd.org>
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The following reply was made to PR kern/8532; it has been noted by GNATS. From: Peter Wemm <peter@netplex.com.au> To: rv@fore.com Cc: freebsd-gnats-submit@FreeBSD.ORG Subject: Re: kern/8532: 3.0-RELEASE panics with standard SMP kernel from /sys/i386/conf/SMP-GENERIC Date: Mon, 02 Nov 1998 09:15:44 +0800 rv@fore.com wrote: [..] > panic: pmap_botostrap: no local apic! ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > I am using a Micron Millenia Mme with one Pentium 200Mhz, 160Mb RAM and > nothing fancy. > > I would like to know what is the supported architecture to run the > SMP kernel on. > > Also, when will there be a version of SMP FreeBSD that will run on a > run-of-the-mill PC? You cannot run a SMP kernel on a uniprocessor motherboard - it is missing too much support hardware, the local and IO APICs in particular. The interrupt mechanism is extensively different when compiled in APIC_IO mode, it is not practical to have one kernel architecture that works on both UP and SMP motherboards, the differences are too great. Also, it's worth noting that the motherboard will disable the on-cpu local apic unless it's SMP capable. I think I've heard that some SMP motherboards will do this too if there is only one cpu, but I am not sure about that. Cheers, -Peter To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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