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From: "John W. M. Stevens" <john@betelgeuse.us>
Date: Sat, 1 Feb 2003 18:12:23 -0700
To: linux-kernel@vger.kernel.org
Subject: Defect (Bug) Report
Message-ID: <20030202011223.GC5432@morningstar.nowhere.lie>
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[1.] One line summary of the problem:

   Defect is kernel hang on Dual Processor, Athlon MP system.

[2.] Full description of the problem/report:

   The system regularly experiences short (from 1 to 5 seconds)
   hangs where both processors appear to be "hung".  Most often,
   the system will recover, but in three different cases the
   system has hung "permanently" (for values of "permanently"
   ranging from 10 minutes, to at most four hours before I gave
   up and hit reset).

[3.] Keywords (i.e., modules, networking, kernel):

   SMP issue.  My current WAG is that this is some kind of spinlock
   issue related to allocating huge amounts of memory in user space
   programs (up to three times the actual installed core).

[4.] Kernel version (from /proc/version):

   Linux version 2.4.18 (root@morningstar) (gcc version 2.95.4 
   20011002 (Debian prerelease)) #13 SMP Sat Jan 18 13:21:01 MST 2003

[5.] Output of Oops.

   Sorry, but since the system hung, there was no Oops.

   I am an HPUX kernel developer in my "real job".  On our systems,
   in this situation, I would execute a TOC (transfer of control)
   then attempt to analyze the dump to see what the processors
   where doing.

   Is there a recognized standard procedure for creating such a
   dump under Linux?

   Sadly, PC hardware does not have support for "TOC", but if
   there is some other method that has been developed to do
   this, one that does not negatively impact normal system operation
   and performance, I will set it up.

[6.] A small shell script or example program which triggers the
	 problem (if possible)

   Sorry, but this seems to be intermittent.  Attempts to reproduce
   this have generated intermittent hangs (allocate from three to
   four times MAX physical core), but do not guarantee a complete
   system hang.

[7.] Environment

   ???

   Is this physical, network, hardware, what?

   OK, hardware then:

   Memory      : 512 MBytes, ECC, 266 MHz FSB.
   Disk        : All SCSI.  See below.
   Mother Board: Tyan Tiger MPX S2466N
   Networking  : Two ethernet cards, one 10 Mbps, one 100 Mbps.

   Adquate cooling and power.

[7.1.] Software (add the output of the ver_linux script here)


If some fields are empty or look unusual you may have an old version.
   Compare to the current minimal requirements in Documentation/Changes.
 
   Linux morningstar 2.4.18 #13 SMP Sat Jan 18 13:21:01 MST 2003 i686 unknown
 
   Gnu C                  2.95.4
   Gnu make               3.79.1
   util-linux             2.11n
   mount                  2.11n
   modutils               2.4.15
   e2fsprogs              1.27
   PPP                    2.4.1
   Linux C Library        2.2.5
   Dynamic linker (ldd)   2.2.5
   Procps                 2.0.7
   Net-tools              1.60
   Console-tools          0.2.3
   Sh-utils               2.0.11
   Modules Loaded         

[7.2.] Processor information (from /proc/cpuinfo):

   processor	: 0
   vendor_id	: AuthenticAMD
   cpu family	: 6
   model		: 6
   model name	: AMD Athlon(tm) MP 1900+
   stepping	: 2
   cpu MHz		: 1600.063
   cache size	: 256 KB
   fdiv_bug	: no
   hlt_bug		: no
   f00f_bug	: no
   coma_bug	: no
   fpu		: yes
   fpu_exception	: yes
   cpuid level	: 1
   wp		: yes
   flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse syscall mmxext 3dnowext 3dnow
   bogomips	: 3191.60

   processor	: 1
   vendor_id	: AuthenticAMD
   cpu family	: 6
   model		: 6
   model name	: AMD Athlon(tm) Processor
   stepping	: 2
   cpu MHz		: 1600.063
   cache size	: 256 KB
   fdiv_bug	: no
   hlt_bug		: no
   f00f_bug	: no
   coma_bug	: no
   fpu		: yes
   fpu_exception	: yes
   cpuid level	: 1
   wp		: yes
   flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse syscall mmxext 3dnowext 3dnow
   bogomips	: 3198.15

[7.3.] Module information (from /proc/modules):

   This is an entirely static system . . . no modules.

[7.4.] Loaded driver and hardware information (/proc/ioports, /proc/iomem)

0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
01f0-01f7 : ide0
02f8-02ff : serial(auto)
0378-037a : parport0
037b-037f : parport0
03c0-03df : vga+
03f6-03f6 : ide0
03f8-03ff : serial(set)
0cf8-0cff : PCI conf1
1010-1013 : PCI device 1022:700c (Advanced Micro Devices [AMD])
2000-2fff : PCI Bus #02
  2000-20ff : Adaptec AHA-2940U2/W
    2000-20ff : aic7xxx
  2400-247f : Digital Equipment Corporation DECchip 21041 [Tulip Pass 3]
    2400-247f : tulip
  2480-24ff : 3Com Corporation 3c905C-TX [Fast Etherlink]
    2480-24ff : 02:08.0
  2800-283f : Ensoniq ES1371 [AudioPCI-97]
    2800-283f : es1371
f000-f00f : Advanced Micro Devices [AMD] AMD-768 [??] IDE
  f000-f007 : ide0
  f008-f00f : ide1

00000000-0009f7ff : System RAM
0009f800-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000cc800-000ccfff : Extension ROM
000cd000-000d27ff : Extension ROM
000e0000-000effff : Extension ROM
000f0000-000fffff : System ROM
00100000-1feeffff : System RAM
  00100000-002ab6e4 : Kernel code
  002ab6e5-0033487f : Kernel data
1fef0000-1fefefff : ACPI Tables
1feff000-1fefffff : ACPI Non-volatile Storage
1ff00000-1ff7ffff : System RAM
1ff80000-1fffffff : reserved
e8000000-e8ffffff : PCI Bus #01
  e8000000-e8ffffff : nVidia Corporation NV11 (GeForce2 MX)
e9000000-e90fffff : PCI Bus #02
  e9000000-e9000fff : Advanced Micro Devices [AMD] AMD-768 [??] USB
    e9000000-e9000fff : usb-ohci
  e9001000-e9001fff : Adaptec AHA-2940U2/W
    e9001000-e9001fff : aic7xxx
  e9002000-e900207f : Digital Equipment Corporation DECchip 21041 [Tulip Pass 3]
    e9002000-e900207f : tulip
  e9002400-e900247f : 3Com Corporation 3c905C-TX [Fast Etherlink]
e9300000-e9300fff : PCI device 1022:700c (Advanced Micro Devices [AMD])
ec000000-efffffff : PCI device 1022:700c (Advanced Micro Devices [AMD])
f0000000-f7ffffff : PCI Bus #01
  f0000000-f7ffffff : nVidia Corporation NV11 (GeForce2 MX)
fec00000-fec03fff : reserved
fee00000-fee00fff : reserved
fff80000-ffffffff : reserved

[7.5.] PCI information ('lspci -vvv' as root)


00:00.0 Host bridge: Advanced Micro Devices [AMD]: Unknown device 700c (rev 11)
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap+ 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ >SERR- <PERR-
	Latency: 64
	Region 0: Memory at ec000000 (32-bit, prefetchable) [size=64M]
	Region 1: Memory at e9300000 (32-bit, prefetchable) [size=4K]
	Region 2: I/O ports at 1010 [disabled] [size=4]
	Capabilities: [a0] AGP version 2.0
		Status: RQ=15 SBA+ 64bit- FW- Rate=x1,x2
		Command: RQ=0 SBA+ AGP+ 64bit- FW- Rate=<none>

00:01.0 PCI bridge: Advanced Micro Devices [AMD]: Unknown device 700d (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap- 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 99
	Bus: primary=00, secondary=01, subordinate=01, sec-latency=68
	I/O behind bridge: 0000f000-00000fff
	Memory behind bridge: e8000000-e8ffffff
	Prefetchable memory behind bridge: f0000000-f7ffffff
	BridgeCtl: Parity- SERR- NoISA+ VGA+ MAbort- >Reset- FastB2B-

00:07.0 ISA bridge: Advanced Micro Devices [AMD]: Unknown device 7440 (rev 05)
	Control: I/O+ Mem+ BusMaster+ SpecCycle+ MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap- 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0

00:07.1 IDE interface: Advanced Micro Devices [AMD]: Unknown device 7441 (rev 04) (prog-if 8a [Master SecP PriP])
	Subsystem: Advanced Micro Devices [AMD]: Unknown device 7441
	Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0
	Region 4: I/O ports at f000 [size=16]

00:07.3 Bridge: Advanced Micro Devices [AMD]: Unknown device 7443 (rev 03)
	Subsystem: Advanced Micro Devices [AMD]: Unknown device 7443
	Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-

00:10.0 PCI bridge: Advanced Micro Devices [AMD]: Unknown device 7448 (rev 05) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap- 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ >SERR- <PERR-
	Latency: 64
	Bus: primary=00, secondary=02, subordinate=02, sec-latency=168
	I/O behind bridge: 00002000-00002fff
	Memory behind bridge: e9000000-e90fffff
	Prefetchable memory behind bridge: fff00000-000fffff
	BridgeCtl: Parity- SERR- NoISA+ VGA- MAbort- >Reset- FastB2B-

01:05.0 VGA compatible controller: nVidia Corporation NV11 (GeForce2 MX) (rev b2) (prog-if 00 [VGA])
	Subsystem: VISIONTEK: Unknown device 0023
	Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Interrupt: pin A routed to IRQ 18
	Region 0: Memory at e8000000 (32-bit, non-prefetchable) [size=16M]
	Region 1: Memory at f0000000 (32-bit, prefetchable) [size=128M]
	Expansion ROM at <unassigned> [disabled] [size=64K]
	Capabilities: [60] Power Management version 2
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [44] AGP version 2.0
		Status: RQ=31 SBA- 64bit- FW+ Rate=x1,x2
		Command: RQ=0 SBA- AGP- 64bit- FW- Rate=<none>

02:00.0 USB Controller: Advanced Micro Devices [AMD]: Unknown device 7449 (rev 07) (prog-if 10 [OHCI])
	Subsystem: Advanced Micro Devices [AMD]: Unknown device 7449
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR+
	Latency: 64 (20000ns max)
	Interrupt: pin D routed to IRQ 19
	Region 0: Memory at e9000000 (32-bit, non-prefetchable) [size=4K]

02:04.0 SCSI storage controller: Adaptec AHA-2940U2/W
	Subsystem: Adaptec: Unknown device a180
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 64 (9750ns min, 6250ns max), cache line size 10
	Interrupt: pin A routed to IRQ 16
	BIST result: 00
	Region 0: I/O ports at 2000 [disabled] [size=256]
	Region 1: Memory at e9001000 (64-bit, non-prefetchable) [size=4K]
	Expansion ROM at <unassigned> [disabled] [size=128K]
	Capabilities: [dc] Power Management version 1
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-

02:05.0 Ethernet controller: Digital Equipment Corporation DECchip 21041 [Tulip Pass 3] (rev 21)
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 64
	Interrupt: pin A routed to IRQ 17
	Region 0: I/O ports at 2400 [size=128]
	Region 1: Memory at e9002000 (32-bit, non-prefetchable) [size=128]
	Expansion ROM at <unassigned> [disabled] [size=256K]

02:07.0 Multimedia audio controller: Ensoniq ES1371 [AudioPCI-97] (rev 08)
	Subsystem: Ensoniq Creative Sound Blaster AudioPCI64V, AudioPCI128
	Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=slow >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 64 (3000ns min, 32000ns max)
	Interrupt: pin A routed to IRQ 19
	Region 0: I/O ports at 2800 [size=64]
	Capabilities: [dc] Power Management version 1
		Flags: PMEClk- DSI+ D1- D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-

02:08.0 Ethernet controller: 3Com Corporation 3c905C-TX [Fast Etherlink] (rev 78)
	Subsystem: Tyan Computer: Unknown device 2466
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 80 (2500ns min, 2500ns max), cache line size 10
	Interrupt: pin A routed to IRQ 19
	Region 0: I/O ports at 2480 [size=128]
	Region 1: Memory at e9002400 (32-bit, non-prefetchable) [size=128]
	Expansion ROM at <unassigned> [disabled] [size=128K]
	Capabilities: [dc] Power Management version 2
		Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=2 PME-

[7.6.] SCSI information (from /proc/scsi/scsi)

Attached devices: 
Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: QUANTUM  Model: ATLAS10K2-TY092L Rev: DA40
  Type:   Direct-Access                    ANSI SCSI revision: 03
Host: scsi0 Channel: 00 Id: 01 Lun: 00
  Vendor: QUANTUM  Model: ATLAS10K2-TY092L Rev: DA40
  Type:   Direct-Access                    ANSI SCSI revision: 03
Host: scsi0 Channel: 00 Id: 02 Lun: 00
  Vendor: QUANTUM  Model: ATLAS10K2-TY092L Rev: DA40
  Type:   Direct-Access                    ANSI SCSI revision: 03
Host: scsi1 Channel: 00 Id: 00 Lun: 00
  Vendor: SAMSUNG  Model: CD-R/RW SW-240B  Rev: R401
  Type:   CD-ROM                           ANSI SCSI revision: 02

[7.7.] Other information that might be relevant to the problem
(please look in /proc and include all information that you
think to be relevant):

   I had a great deal of difficulty getting an IDE based SamSung
   CD/RW drive working on this system.

   I had to play around with "Sharing PCI IDE interrupts support",
   and "Use PCI DMA by default when available" options in the
   kernel configuration to find a configuration that would not
   hang the kernel when attempting to burn a CDR.

So, to obtain further information, I would need some kind of ability
to force an Oops . . . can this be done with SysReq hot keys?  There
doesn't appear to be any indication that this is the case.

For starters, I've gone in and activated Magic SysReq key (just in case),
spinlock debugging (best guess as to reason of hang), and verbose BUG
reporting (for luck!).

Any other suggestions, or recommendations to get more info?

Thanks,
John S.
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