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    SubjectRe: About Celeron processor memory barrier problem
    On Thu, Dec 23, 1999 at 05:24:43PM +0800, michael chen wrote:
    > I found that when I compiled the 2.4 kernel with the option
    > of Pentium III or Pentium 4 on a Celeron's PC, it could cause the
    > system hang at very beginning boot stage, and I found the problem
    > is cause by the fact that Intel Celeron doesn't have a real memory
    > barrier,but when you choose the Pentium III option, the kernel
    > assume the processor has a real memory barrier.

    I think there is some confusion in the name "Celeron". AFAIK there are
    two kinds of Celerons: the original PII based Celeron, or the newer
    PIII based Celeron. My laptop has a PIII (Coppermine) based Celeron,
    and it boots perfectly well without your patch.

    If you are using a PII based Celeron, you should compile the kernel
    with support for the "Pentium-Pro/Celeron/Pentium-II". You certainly
    should not try to run a kernel with support for P4 on a "lower" CPU,
    read the documentation about CONFIG_M386 in Documentation/
    for more information.


    J.A.K. (Erik) Mouw, Information and Communication Theory Group, Department
    of Electrical Engineering, Faculty of Information Technology and Systems,
    Delft University of Technology, PO BOX 5031, 2600 GA Delft, The Netherlands
    Phone: +31-15-2783635 Fax: +31-15-2781843 Email:
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