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    SubjectRe: l1tf: Kernel suggests I throw away third of my memory. I'd rather not
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    On 10/17/18 4:08 PM, Andi Kleen wrote:
    > On Wed, Oct 17, 2018 at 12:56:10PM +0200, Pavel Machek wrote:
    >> Hi!
    >>
    >> 6a012288 suggests I throw away 1GB on RAM. On 3GB system.. that is not
    >> going to be pleasant.
    >
    > Just rebuild your kernel with PAE? I assume your CPU supports it.

    I think it is built with PAE or this would kick in:

    #if CONFIG_PGTABLE_LEVELS == 2
    pr_warn("Kernel not compiled for PAE. No mitigation for L1TF\n");
    return;
    #endif

    I.e. no MAX_PA/2 messages.

    > This will also give you NX, which if you're really worried
    > about security is far more important than L1TF.
    >
    > If you don't worry about security just ignore.
    >
    > -Andi
    >

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