From: Mark Gross <mgross@linux.co.intel.com>
Organization: Intel
To: "Justin Piszcz" <jpiszcz@hotmail.com>, mgross@linux.co.intel.com
Subject: Re: Linux Kernel 2.6.4 - APIC Errors
Date: Tue, 30 Mar 2004 10:42:23 -0800
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You stinker ;)

I replied to your email off list cuz I used to work with Al about 100 years ago in Utica NY.

I did trace the source of the kprint to the apic code.  arch/i386/kernel/apic.c; smp_error_interrupt 
 0x40 is APIC error bit 6 "Illegal register addres" from the code comments.

The interrupt handler gets installed through some tricky BS code, see include/asm-i386/mach-arch/entry_arch.h using
a macro BUILD_INTERRUPT that insalls the error_interrupt by prefixing the "smp_" at compile time.

I'd say something strange is going on with some driver touching the APIC, but I'm no expert.  

Can you reproduce it with 2.6.3 and the same .config used in your 2.6.4 version?  (i.e both need to be running SMP or LOCAL_APIC kernels)

--mgross


On Tuesday 30 March 2004 03:11, Justin Piszcz wrote:
> The motherboard has more than adequate cooling and is not touched and in a
> proper cooled environment.
>
> I do not recall seeing these in Kernel 2.6.3, although I am not 100%
> certain.
>
> Seriously, what would cause such APIC errors?
>
>
> From: Mark Gross  <mgross@linux.co.intel.com>
>
> >To: "Justin Piszcz" <jpiszcz@hotmail.com>
> >Subject: Re: Linux Kernel 2.6.4 - APIC Errors
> >Date: Mon, 29 Mar 2004 16:11:28 -0800
> >
> >On Monday 29 March 2004 10:16, Justin Piszcz wrote:
> > > Does anyone know what would cause these APIC errors?
> >
> >Pepsi on your motherboard?
> >
> >--mgross
> >
> > > # dmesg
> > > APIC error on CPU0: 40(40)
> > > APIC error on CPU0: 40(40)
> > > APIC error on CPU0: 40(40)
> > >
> > > Linux l1 2.6.4 #1 Thu Mar 18 10:11:29 EST 2004 i686 unknown unknown
> > > GNU/Linux
> > > processor	: 0
> > > vendor_id	: GenuineIntel
> > > cpu family	: 15
> > > model		: 2
> > > model name	: Intel(R) Pentium(R) 4 CPU 2.53GHz
> > > stepping	: 7
> > > cpu MHz		: 2546.123
> > > cache size	: 512 KB
> > > fdiv_bug	: no
> > > hlt_bug		: no
> > > f00f_bug	: no
> > > coma_bug	: no
> > > fpu		: yes
> > > fpu_exception	: yes
> > > cpuid level	: 2
> > > wp		: yes
> > > flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
> >
> >pat
> >
> > > pse36
> > > clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid
> > > bogomips	: 5029.88
> > >
> > > 00:00.0 Host bridge: Silicon Integrated Systems [SiS]: Unknown device
> >
> >0655
> >
> > > 00:01.0 PCI bridge: Silicon Integrated Systems [SiS] SiS 530 Virtual
> > > PCI-to-PCI
> > > bridge (AGP)
> > > 00:02.0 ISA bridge: Silicon Integrated Systems [SiS]: Unknown device
> >
> >0963
> >
> > > (rev
> > > 04)
> > > 00:02.1 SMBus: Silicon Integrated Systems [SiS]: Unknown device 0016
> > > 00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE]
> > > 00:07.0 Unknown mass storage controller: Promise Technology, Inc. 20269
> > > (rev 02)
> > > 00:08.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1
> > > (rev 07) 00:08.1 Input device controller: Creative Labs SB Live!
> > > MIDI/Game
> >
> >Port
> >
> > > (rev 07)
> > > 00:0a.0 SCSI storage controller: LSI Logic / Symbios Logic 53c875 (rev
> >
> >03)
> >
> > > 00:0f.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5702
> >
> >Gigabit
> >
> > > Ethernet (rev 02)
> > > 01:00.0 VGA compatible controller: nVidia Corporation NV28 [GeForce4 Ti
> > > 4800 SE]
> > > (rev a1)
> > >
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