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    SubjectRe: bisected boot regression post 2.6.25-rc3.. please revert
    Arjan van de Ven wrote:
    > Linus Torvalds wrote:
    >>
    >> On Mon, 3 Mar 2008, Arjan van de Ven wrote:
    >>> interesting observation: if I turn the macros into inlines... the
    >>> difference
    >>> goes away.
    >>>
    >>> I'm half tempted to just do it as inline period ... any objections ?
    >>
    >> Yes, I object. I want to understand why it would matter. If this is a
    >> compiler bug, it's a really rather bad one. And if it's just some
    >> stupid bug in our pmd_bad() macro, I still want to know what the
    >> problem was.
    >>
    >> Can you compile both ways and look at what changed at the offending
    >> site (which is apparently "follow_page()")?
    >>
    >> And do you have some odd compiler version?
    >
    > it's the F9 gcc, so yeah it's really new.
    >
    > I'm staring at the disassembly and it's quite different but
    > follow_page() is rather large;
    > trying to make a smaller testcase now

    sadly a more isolated testcase doesn't show the same behavior yet;
    so it's some fun interaction ;(

    more staring at the assembly for me


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