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    SubjectRe: [patch 13/16] x86/ldt: Introduce LDT write fault handler
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    On 12/12/2017 11:21 AM, Thomas Gleixner wrote:
    > The only critical interaction is the return to user path (user CS/SS) and
    > we made sure with the LAR touching that these are precached in the CPU
    > before we go into fragile exit code.

    How do we make sure that it _stays_ cached?

    Surely there is weird stuff like WBINVD or SMI's that can come at very
    inconvenient times and wipe it out of the cache.

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