2.1.115 Panic Shortly After Boot (Interrupt related???)

[Daniel Thom]

	I've been having problems running the development kernels on my 
SMP machine at work for quite some time now.  (Well actually I've only 
tried 106, 108, 114, and now 115).  Now that Linus has said we are 
freezing other than bug fixes I thought that I'd see if anyhow has any 
idea what my problem may be.  Shortly after I booted my system on 2.1.115 
I had a panic.  I was able to sync and remount my filesystem in read only 
mode and then reboot using the Magic SysRQ key.  I previously ran a 2.0.34 
kernel with no problems for a long time.  I tried a 2.1.108 a while back 
and had similar problems, so I dropped back to 2.1.106 and the system would 
be ok for around 30 minutes and then the system would hang.  This machine is 
running an SMP kernel with 2 120Mhz PPro procs.(Don't ask...)  I've 
disabled my secondary IO-APIC as suggested by a friend, but I still have 
problems.(I'm not quite certain why this would help, I didn't have time 
to research that, but he is quite knowledgeable:->)  When I was running 
2.1.108 I was unable to sync the disks, which lead me to believe that 
the problem was with the disk interrupt.  (Some of the other sysreq keys 
did work.)  I believe at this time I was having IRQ Deadlock problems, 
but I cannot remember for sure.

	Does anyone have any idea what is happening here?  I'm fairly new 
to debugging problems like this, so I'm at a loss for what may be happening.
I've included the kernel panic message and a bit of information I was 
able to get before the machine paniced.

page fault from irq handler: 0000
CPU:	2
EIP:	0010:[<c0171926>]
EFLAGS:	00010282
eax: 00000000	ebx: eea2229f	ecx: c009008a	edx: e1bc5f8a
esi: eea2008a	edi: c4ed001e	ebp: c4ed001e	esp: c03afe5c
ds: 0018	es: 0018	ss: 0018
Process swapper (pid: 0, process nr: 1, stackpage=c03af000)
Stack:	c4ed001e 0000008a c016ed62 c03afe7c c03afeec 00000000 c51b9800 
e1bc008a
	0000008a c08afe00 c01720f0 eea2229f c0092580 c4ed001e 00000000 0000008a
	0000008a 00000000 c03aff62 c00924a0 c4ed001e c03aff62 00000081 c4f075a0
Call Trace: [<c016ed62>] [<c01720f0>] [<c017347c>] [<c014c0e7>] [<c015a75f>]
[<c014eac4>] [<c011b771>]
	[<c010c7e2>] [<c010aed4>] [<c0106000>] [<c010937b>] [<c0107f70>]
Code: 23 53 08 39 13 0f 95 c1 0f b6 d1 f6 43 18 01 74 09 85 d2 74
Aiee, killing interrupt handler
Kernel panic: Attempted to kill the idle task!
In interrupt handler - not syncing

/proc/pci
PCI devices found:
  Bus  0, device  14, function  0:
    Non-VGA device: Intel 82375EB (rev 5).
      Medium devsel.  Master Capable.  Latency=248.  
  Bus  0, device  15, function  0:
    Unknown class: Intel Unknown device (rev 0).
      Vendor id=8086. Device id=8.
      Fast devsel.  Fast back-to-back capable.  
      Prefetchable 32 bit memory at 0xfec01000 [0xfec01008].
      Prefetchable 32 bit memory at 0xfec01000 [0xfec01008].
      Prefetchable 32 bit memory at 0xfec01000 [0xfec01008].
      Prefetchable 32 bit memory at 0xfec01000 [0xfec01008].
      Prefetchable 32 bit memory at 0xfec01000 [0xfec01008].
      Prefetchable 32 bit memory at 0xfec01000 [0xfec01008].
  Bus  0, device  25, function  0:
    Host bridge: Intel Orion P6 (rev 2).
      Medium devsel.  Fast back-to-back capable.  Master Capable.  Latency=32.  
  Bus  0, device  26, function  0:
    Host bridge: Intel Orion P6 (rev 2).
      Medium devsel.  Fast back-to-back capable.  Master Capable.  Latency=32.  
  Bus  1, device  10, function  0:
    Ethernet controller: DEC DC21040 (rev 35).
      Medium devsel.  Fast back-to-back capable.  IRQ 9.  Master Capable.  Latency=66.  
      I/O at 0xf880 [0xf881].
      Non-prefetchable 32 bit memory at 0xfeaffc00 [0xfeaffc00].
  Bus  1, device  13, function  0:
    Ethernet controller: DEC DC21040 (rev 35).
      Medium devsel.  Fast back-to-back capable.  IRQ f.  Master Capable.  Latency=66.  
      I/O at 0xf800 [0xf801].
      Non-prefetchable 32 bit memory at 0xfeaff800 [0xfeaff800].
  Bus  1, device  11, function  0:
    SCSI storage controller: Adaptec AIC-7870 (rev 3).
      Medium devsel.  Fast back-to-back capable.  IRQ b.  Master Capable.  Latency=64.  Min Gnt=8.Max Lat=8.
      I/O at 0xfc00 [0xfc01].
      Non-prefetchable 32 bit memory at 0xfeafe000 [0xfeafe000].
  Bus  1, device  12, function  0:
    SCSI storage controller: Adaptec AIC-7870 (rev 3).
      Medium devsel.  Fast back-to-back capable.  IRQ 9.  Master Capable.  Latency=64.  Min Gnt=8.Max Lat=8.
      I/O at 0xf400 [0xf401].
      Non-prefetchable 32 bit memory at 0xfeafd000 [0xfeafd000].

/proc/interrupts
           CPU0       CPU1       
  0:      15951       8224    IO-APIC-edge  timer
  1:         66         51    IO-APIC-edge  keyboard
  2:          0          0          XT-PIC  cascade
  4:         13         17    IO-APIC-edge  serial
  8:          0          1    IO-APIC-edge  rtc
  9:      13804       5643    IO-APIC-edge  aic7xxx, Digital DS21040 Tulip
 11:         10         20    IO-APIC-edge  aic7xxx
 13:          0          0          XT-PIC  fpu
 15:          4         10    IO-APIC-edge  Digital DS21040 Tulip
NMI:          0
IPI:          0

/proc/ioports
0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0070-007f : rtc
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
03c0-03df : vga+
03f8-03ff : serial(auto)
f400-f4be : aic7xxx
f800-f87f : Digital DS21040 Tulip
f880-f8ff : Digital DS21040 Tulip
fc00-fcbe : aic7xxx