Messages in this thread | | | Date | Sun, 10 Jan 1999 20:10:23 -0800 (PST) | From | Allen Goldstein <> | Subject | Re: SMP and CPU Stepping / Linux Crashes |
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*********************************************** I also have a P6DNF board running SMP on 2.2pre4 (no MTRR) that won't stay up. ******************************** On Sun, 10 Jan 1999, Bastard Operator from Hell wrote:
> Can anyone point me to a resource or otherwise explain to me how > significant CPU stepping is on SMP systems? > > While playing with 2.2.0-preX kernels I recently noticed that my dual > PPro 180Mhz Tyan Titan Pro Red Hat Linux 5.2 system has CPU0 with a > stepping of 7 and CPU1 with a stepping of 9. It seems to run SMP > kernels just fine. > > However, I also have a dual PPro 200Mhz SuperMicro P6DNF Red Hat Linux > 5.2 system with CPU0 with a stepping of 7 and CPU1 with a stepping of 9 > and it always crashes within 24 hours with any SMP kernel (2.1.1XX and > 2.2.0-preX with MTRR). I've tried different 3c905 NICs, different EDO > RAM, updated the SuperMicro BIOS, and anything else listed in the > Linux-SMP FAQ to no avail. > > I have an NT BackOffice 4.0 (ack...I know, I know) system which is a > dual PPro 200Mhz SuperMicro P6DNF with both CPUs having a stepping of 9 > and it almost never crashes (well, OK, NT4SP4 does its usual crap from > time to time, but it runs very loaded for weeks at a time without > errors). This system uses the same RAM, motherboard, 3c905 NIC, and > DPT3334 EATA/DMA SCSI as the aforementioned crashing Linux box. The > only real hardware difference is the CPU stepping. > > I have a customer with an NT BackOffice 4.0 system which is dual PPro > 200Mhz, 3c905 NIC, DPT3334 EATA/DMA SCSI and CPU steppings of 7 and 9 > but with a Tyan Titan Pro motherboard. It has not crashed or otherwise > been rebooted for months. > > When, if ever, is CPU stepping an issue? Could it be that mixing > steppings on certain motherboards is a bad idea? > > Please don't ignore me just because I admitted that I use NT. :-O > > Thanks! > > --BOFH > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.rutgers.edu > Please read the FAQ at http://www.tux.org/lkml/ >
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