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    SubjectRe: [PATCH/RFC] Shared page tables
    Date
    On Tuesday 24 January 2006 02:23, Benjamin LaHaise wrote:
    > On Tue, Jan 24, 2006 at 02:10:03AM +0100, Andi Kleen wrote:
    > > The randomization is not for cache coloring, but for security purposes
    > > (except for the old very small stack randomization that was used
    > > to avoid conflicts on HyperThreaded CPUs). I would be surprised if the
    > > mmap made much difference because it's page aligned and at least
    > > on x86 the L2 and larger caches are usually PI.
    >
    > Actually, does this even affect executable segments? Iirc, prelinking
    > already results in executables being mapped at the same physical offset
    > across binaries in a given system. An strace seems to confirm that.

    Shared libraries should be affected. And prelink is not always used.

    -Andi
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