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    SubjectRe: Boot failure in 2.5.31 BK with new TLS patch

    On Sat, 17 Aug 2002, Gabriel Paubert wrote:

    > Hey no, it's cpu_gdt_table that must be aligned. That one does not
    > matter, it's only used once for the lgdt instruction...

    you are right, i misread the - cpu_gdt_table is aligned

    c02a39e0 D cpu_gdt_table

    so it must be something else that prevents booting on those boxes. Does
    the boot BIOS code perhaps assume a certain GDT layout? A certain size?
    Does it overwrite certain GDT entries perhaps?

    > Ingo, for the layout of the gdt also, the location of the TSS descriptor
    > is irrelevant AFAICT. It's only used when doing the initial LTR, after
    > that it's never referenced by the CPU.

    yes. Fortunately this makes no difference, the LDT and the default DS/CS
    are in a single cacheline still.


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