Messages in this thread | | | Date | Wed, 12 Nov 1997 15:54:19 -0500 (EST) | From | Linux Developer <> | Subject | Re: SMP kernels and single Cyrix processor problem |
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On Tue, 11 Nov 1997, Brian Gerst wrote:
> I've been having problems lately with forgetting to unset SMP=1 which is > enabled by default in the 2.1.x kernels, only to end up with an unusable > kernel on my cpu/motherboard. I have a Tyan Tomcat IV (SMP capable) > board, and a Cyrix 6x86L 166+ processor. When the SMP kernel starts it > immediately oopses after detecting that the motherboard supports SMP, > even though the processor does not. I have not been able to capture the > oopses as they scroll by too fast and syslog has not started yet. Is > there any way I can catch the oopses so I can figure out where it is > crashing? At least it should determine that the mobo/cpu cannot run an > SMP kernel and halt with a warning instead of producing the oopses.
I have spoken with Cyrix about SMP on the 6x86 and 6x86MX series of CPUs a number of times in the past. Cyrix and AMD both use the OpenPic chipset for SMP. In order to use a single Cyrix on an SMP board, you must compile the kernel as single-CPU, and if necessary, set the motherboard to single-CPU mode. The Tyan Tomcat series shouldn't require this, but you DO need a single-CPU kernel. Either that or another Cyrix and a dual Socket7 OpenPic chipset motherboard. ;)
-Phillip R. Jaenke [InterNIC Handle: PRJ5] (kernel@prj.pcimporters.com) MIS Department, PC Importers, Inc. 800.319.9284, x4262 Head of Development, The Improvement Linux Project.
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