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    SubjectRE: [2.6.12] x86-64 IO-APIC + timer doesn't work
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    >-----Original Message-----
    >From: Andi Kleen [mailto:ak@muc.de]
    >Sent: Saturday, June 18, 2005 6:34 PM
    >To: Alistair John Strachan
    >Cc: linux-kernel@vger.kernel.org; ACurrid@nvidia.com;
    >Pallipadi, Venkatesh
    >Subject: Re: [2.6.12] x86-64 IO-APIC + timer doesn't work
    >
    >> Despite the fact that this wasn't documented in the BIOS
    >update, an update for
    >> my board (MS-7030 Neo Platinum by MSI) supposedly fixing
    >"Fan Function"
    >> actually corrects the IO-APIC and NMI bugs. I now get the
    >following in dmesg
    >> instead:
    >>
    >> Calibrating delay loop... 3973.12 BogoMIPS (lpj=1986560)
    >> Mount-cache hash table entries: 256
    >> CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
    >> CPU: L2 Cache: 512K (64 bytes/line)
    >> CPU: AMD Athlon(tm) 64 Processor 3000+ stepping 00
    >> Using local APIC timer interrupts.
    >> Detected 12.561 MHz APIC timer.
    >> testing NMI watchdog ... OK.
    >>
    >> So I'm a happy man. Whether this is at all related to the
    >problems I was
    >> having before, I don't really know. If the problem doesn't
    >reoccur, I could
    >> very well have wasted your time.
    >
    >Hmm - I suspect I know what's happening. The older BIOS
    >probably had some long
    >running SMM code that breaks the BogoMips computation occasionally
    >and that breaks the timer check later which relies on usable BogoMips.
    >
    >There was a patch for that from Venkatesh (because it showed on some
    >other machines too), but it didn't seem to have made it into 2.6.12
    >
    >Venkatesh, can you push your calibrate_delay patch please? ?
    >
    >
    >-Andi


    That patch is in mm tree.

    http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.12-rc
    6/2.6.12-rc6-mm1/broken-out/platform-smis-and-their-interferance-with-ts
    c-based-delay-calibration.patch

    http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.12-rc
    6/2.6.12-rc6-mm1/broken-out/platform-smis-and-their-interferance-with-ts
    c-based-delay-calibration-fix.patch

    Thanks,
    Venki
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