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    SubjectRe: [PATCH] x86, AMD: Correct F15h IC aliasing issue

    * Borislav Petkov <bp@amd64.org> wrote:

    > > Was this done with a stock kernel, or with the simple patch
    > > applied?
    >
    > with the simplest version of Linus' patch:
    >
    > diff --git a/arch/x86/mm/mmap.c b/arch/x86/mm/mmap.c
    > index 1dab519..6b1094d 100644
    > --- a/arch/x86/mm/mmap.c
    > +++ b/arch/x86/mm/mmap.c
    > @@ -90,6 +90,8 @@ static unsigned long mmap_rnd(void)
    > rnd = (long)get_random_int() % (1<<8);
    > else
    > rnd = (long)(get_random_int() % (1<<28));
    > +
    > + rnd &= ~0x7;

    So, unless i got the stats right, unmodified kernel has like a 75%
    mis-aligned rate, while with the simple fix this goes down to 30%?

    Have you run the numbers on the stock, unmodified kernel by any
    chance, just to make sure the stats are ok?

    Thanks,

    Ingo


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