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    SubjectRe: [RFC 00/15] x86_64: Optimize percpu accesses
    Jeremy Fitzhardinge wrote:
    > H. Peter Anvin wrote:
    >> Did the suspected linker bug issue ever get resolved?
    > I don't believe so. I think Mike is getting very early crashes
    > depending on some combination of gcc, linker and kernel config. Or
    > something.

    Yes and unfortunately since SGI does not do it's own compilers any
    more (they were MIPS compilers), there's no one here that really
    understands the internals of the compile tools.

    > This fragility makes me very nervous. It seems hard enough to get this
    > stuff working with current tools; making it work over the whole range of
    > supported tools looks like its going to be hard.

    (me too ;-)

    Once I get a solid version working with (at least) gcc-4.2.4, then
    regression testing with older tools will be easier, or at least a
    table of results can be produced.


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