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    SubjectRe: [git pull] x86 PAT changes

    * Gabriel C <nix.or.die@googlemail.com> wrote:

    > Ingo Molnar wrote:
    > > * Gabriel C <nix.or.die@googlemail.com> wrote:
    > >
    > >> Hi Ingo,
    > >>
    > >> When using an 64bit ( didn't got time to test 32bit now ) kernel[1]
    > >> with PAT enabled , kvm-intel does not work anymore.
    > >>
    > >> When modprobing kvm-intel , kvm is saying VT extension is disable by
    > >> BIOS which isn't true. When disabling PAT again ( no changes to BIOS )
    > >> kvm-intel works again here.
    > >>
    > >> Is that an known problem ?
    > >
    > > no, that side-effect was not known. Cc:-ed more folks.
    >
    > It seems like the update triggers some compiler bug.
    >
    > Setting CC_OPTIMIZE_FOR_SIZE=n fixed that btw.
    >
    > I don't have the time right now but later on today I will compile
    > gcc43_svn_branch and test again with CC_OPTIMIZE_FOR_SIZE=y and see
    > what I get.
    >
    > Ingo sorry for the noise.

    no problem and it's not noise even if it turns out to be a compiler
    problem - we very much want to know about them when they affect the
    kernel.

    Ingo


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