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    SubjectRe: [patch 47/60] x86/ldt: Map LDT entries into fixmap
    On Mon, Dec 4, 2017 at 6:07 AM, Thomas Gleixner <tglx@linutronix.de> wrote:
    > From: Thomas Gleixner <tglx@linutronix.de>
    >
    > LDT is not really commonly used on 64bit so the overhead of populating the
    > fixmap entries on context switch for the rare LDT syscall users is a
    > reasonable trade off vs. having extra dynamically managed mapping space per
    > process.
    >

    Hmm, I wonder just how slow this is. It might be okay. It's
    certainly not the way I imagined it working.

    --Andy

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