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    From
    SubjectRe: Kernel for Pentium 4 hyperthreading?
    Date
    Hi,

    It's possible to enable HT on any pentium 4, you just have to patch the bios
    :P


    > Hi,
    >
    > What I have is, indeed, a hyperthread-enabled Pentium 4. They aren't
    common;
    > I obtained this one direct from Intel through their Early Access Program.
    > The proof in the pudding is that both Windows XP and Linux 2.5.51
    recognize
    > it as having "two" processors. The motherboard is an Intel Maryville2
    (i850E
    > chipset), with an option to enable/disable HT on the first BIOS set-up
    > screen.
    >
    > > Note that just because /proc/cpuinfo shows 'ht' does not mean you can
    > > use it in hyperthreaded mode. To do that, you also have to have >1
    > > sibling in the physical package. Non-Xeon type P4's don't have the
    > > extra sibling, so don't function as a hyperthreaded CPU.
    >
    > Mine does, and so will any 3.06 or 3.6 GHz Pentium 4.
    >
    > As it is, I'm past the worst of my troubles (knock on wood!) We'll see
    what
    > happens in the coming days the machine gets stressed. It looks stable with
    > 2.5.51 -- so I guess I'm now a Linux kernel beta tester... ;)
    >
    > Thanks much.
    >
    > ..Scott
    >
    > --
    > Scott Robert Ladd
    > Coyote Gulch Productions, http://www.coyotegulch.com
    > No ads -- just very free (and somewhat unusual) code.
    >
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