RE: [2.6.12] x86-64 IO-APIC + timer doesn't work

["Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com>]

>-----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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