PROBLEM : PCI hotplug crashes with 2.4.9

[1.] PCI hotplug crashes with 2.4.9

[2.] hotplug causes the system to crash with kernel 2.4.9 (same configuration with 2.4.6 was OK). A manual run of "/etc/rc.d/init.d/hotplug start" shows that the system crashes immediatly when the system starts to scan the PCI devices. Only the first line "pcimodules scanning 00:00.0" is displayed. No trace is written in /var/log/messages.

[3.] PCI hotplug kernel
[4.] Linux version 2.4.9 ([email protected]) (gcc version 2.96 20000731 (Red Hat Linux 7.1 2.96-81)) #2 dim aoû 19 19:02:56 CEST 2001 [5.]
[6.] /etc/hotplug/pci.rc start
[7.]
[7.1] Software

Linux pierre.juhen 2.4.9 #2 dim aoû 19 19:02:56 CEST 2001 i686 unknown

Gnu C                  2.96
Gnu make               3.79.1
binutils               2.10.91.0.2
util-linux             2.10s
mount                  2.11b
modutils               2.4.2
e2fsprogs              1.19
reiserfsprogs          3.x.0b
pcmcia-cs              3.1.19
PPP                    2.4.0
isdn4k-utils           3.1pre1
Linux C Library        2.2.2
Dynamic linker (ldd)   2.2.2
Procps                 2.0.7
Net-tools              1.56
Console-tools          0.3.3
Sh-utils               2.0

[7.2] Processor

processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 5
model name : Pentium II (Deschutes)
stepping : 2
cpu MHz : 400.914
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 sep mtrr pge mca
cmov pat pse36 mmx fxsr
bogomips : 799.53

[7.3] modules

pppoatm                 2832   1
ppp_generic            14816   3 [pppoatm]
slhc                    5024   0 [ppp_generic]
usb-uhci               21088   0 (unused)
speedtch               11568   3
snd-seq-midi            3600   0 (unused)
snd-seq-midi-event      3264   0 [snd-seq-midi]
snd-seq                41792   0 [snd-seq-midi snd-seq-midi-event]
snd-card-ens1371        2288   0
snd-ens1371             9664   0 [snd-card-ens1371]
snd-rawmidi            10080   0 [snd-seq-midi snd-ens1371]
snd-seq-device          4016   0 [snd-seq-midi snd-seq snd-rawmidi]
snd-pcm                31520   0 [snd-ens1371]
snd-timer               8560   0 [snd-seq snd-pcm]
snd-ac97-codec         25024   0 [snd-ens1371]
snd-mixer              24608   0 [snd-ens1371 snd-ac97-codec]
snd                    34896   1 [snd-seq-midi snd-seq-midi-event
snd-seq snd-card-ens1371 snd-ens1371 snd-rawmidi snd-seq-device snd-pcm
snd-timer snd-ac97-codec snd-mixer]
soundcore               4144   2 [snd]
3c509                   6224   1 (autoclean)
ipchains               35904   0 (unused)
nls_iso8859-1           2880   1 (autoclean)
nls_cp437               4384   1 (autoclean)
vfat                    9424   1 (autoclean)
fat                    32320   0 (autoclean) [vfat]
usbcore                50272   1 [usb-uhci speedtch]

[7.4] iomem / ioports

00000000-0009fbff : System RAM
0009fc00-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000c8000-000cdfff : Extension ROM
000f0000-000fffff : System ROM
00100000-07feffff : System RAM
00100000-001fb813 : Kernel code
001fb814-00257b7f : Kernel data
07ff0000-07ff2fff : ACPI Non-volatile Storage 07ff3000-07ffffff : ACPI Tables
d8000000-dbffffff : Intel Corporation 440BX/ZX - 82443BX/ZX Host bridge dc000000-deffffff : PCI Bus #01
dc000000-dc003fff : Matrox Graphics, Inc. MGA G200 AGP dd000000-dd7fffff : Matrox Graphics, Inc. MGA G200 AGP
df000000-dfffffff : PCI Bus #01
df000000-dfffffff : Matrox Graphics, Inc. MGA G200 AGP
e1000000-e1003fff : PCI device 104c:8020 (Texas Instruments) e1004000-e1004fff : Adaptec AHA-2940U/UW / AHA-39xx / AIC-7895
e1004000-e1004fff : aic7xxx
e1005000-e10057ff : PCI device 104c:8020 (Texas Instruments) e1006000-e1006fff : Adaptec AHA-2940U/UW / AHA-39xx / AIC-7895 (#2)
e1006000-e1006fff : aic7xxx
ffff0000-ffffffff : reserved

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
0280-028f : 3c509
02f8-02ff : serial(auto)
03c0-03df : vga+
03f6-03f6 : ide0
03f8-03ff : serial(auto)
0cf8-0cff : PCI conf1
4000-403f : Intel Corporation 82371AB PIIX4 ACPI 5000-501f : Intel Corporation 82371AB PIIX4 ACPI e000-e01f : Intel Corporation 82371AB PIIX4 USB
e000-e01f : usb-uhci
e400-e43f : Ensoniq ES1371 [AudioPCI-97]
e400-e43f : Ensoniq AudioPCI
e800-e8ff : Adaptec AHA-2940U/UW / AHA-39xx / AIC-7895 ec00-ecff : Adaptec AHA-2940U/UW / AHA-39xx / AIC-7895 (#2) f000-f00f : Intel Corporation 82371AB PIIX4 IDE

[7.5] PCI

00:00.0 Host bridge: Intel Corporation 440BX/ZX - 82443BX/ZX Host bridge (rev 02)
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: 32
        Region 0: Memory at d8000000 (32-bit, prefetchable) [size=64M]
        Capabilities: [a0] AGP version 1.0
                Status: RQ=31 SBA+ 64bit- FW- Rate=x1,x2
                Command: RQ=0 SBA- AGP- 64bit- FW- Rate=<none>

00:01.0 PCI bridge: Intel Corporation 440BX/ZX - 82443BX/ZX AGP bridge (rev 02) (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=01, subordinate=01, sec-latency=32 I/O behind bridge: 0000f000-00000fff
Memory behind bridge: dc000000-deffffff
Prefetchable memory behind bridge: df000000-dfffffff
BridgeCtl: Parity- SERR- NoISA- VGA+ MAbort- >Reset- FastB2B+

00:07.0 ISA bridge: Intel Corporation 82371AB PIIX4 ISA (rev 02)
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: Intel Corporation 82371AB PIIX4 IDE (rev 01) (prog-if 80 [Master])
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: 32
        Region 4: I/O ports at f000 [size=16]

00:07.2 USB Controller: Intel Corporation 82371AB PIIX4 USB (rev 01) (prog-if 00 [UHCI])
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: 32
        Interrupt: pin D routed to IRQ 11
        Region 4: I/O ports at e000 [size=32]

00:07.3 Bridge: Intel Corporation 82371AB PIIX4 ACPI (rev 02)
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 ? routed to IRQ 9

00:0f.0 FireWire (IEEE 1394): Texas Instruments: Unknown device 8020 (prog-if 10 [OHCI])
Subsystem: Pinnacle Systems Inc.: Unknown device 000e
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: 32 (500ns min, 1000ns max), cache line size 08
        Interrupt: pin A routed to IRQ 15
        Region 0: Memory at e1005000 (32-bit, non-prefetchable)
[size=2K]
        Region 1: Memory at e1000000 (32-bit, non-prefetchable)

[size=16K]
Capabilities: [44] 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-

00:10.0 Multimedia audio controller: Ensoniq ES1371 [AudioPCI-97] (rev
02)
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 10
Region 0: I/O ports at e400 [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-

00:14.0 SCSI storage controller: Adaptec AHA-2940U/UW / AHA-39xx / AIC-7895 (rev 04)

        Subsystem: Adaptec AHA-2940U/2940UW Dual AHA-394xAU/AUW/AUWD

AIC-7895B
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: 32 (2000ns min, 2000ns max)
        Interrupt: pin A routed to IRQ 11
        Region 0: I/O ports at e800 [disabled] [size=256]
        Region 1: Memory at e1004000 (32-bit, non-prefetchable)

[size=4K]
Expansion ROM at e0000000 [disabled] [size=64K]
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-

00:14.1 SCSI storage controller: Adaptec AHA-2940U/UW / AHA-39xx / AIC-7895 (rev 04)

        Subsystem: Adaptec AHA-2940U/2940UW Dual AHA-394xAU/AUW/AUWD

AIC-7895B
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: 32 (2000ns min, 2000ns max)
        Interrupt: pin B routed to IRQ 15
        Region 0: I/O ports at ec00 [disabled] [size=256]
        Region 1: Memory at e1006000 (32-bit, non-prefetchable)

[size=4K]
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-

01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G200 AGP (rev 01) (prog-if 00 [VGA])
Subsystem: Matrox Graphics, Inc. MGA-G200 AGP
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: 32 (4000ns min, 8000ns max), cache line size 08
        Interrupt: pin A routed to IRQ 15
        Region 0: Memory at df000000 (32-bit, prefetchable) [size=16M]
        Region 1: Memory at dc000000 (32-bit, non-prefetchable)
[size=16K]
        Region 2: Memory at dd000000 (32-bit, non-prefetchable)

[size=8M]
Expansion ROM at <unassigned> [disabled] [size=64K]
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-
Capabilities: [f0] AGP version 1.0
Status: RQ=31 SBA+ 64bit- FW- Rate=x1,x2
Command: RQ=31 SBA+ AGP+ 64bit- FW- Rate=x2

[7.6] SCSI

Host: scsi0 Channel: 00 Id: 04 Lun: 00
Vendor: MATSHITA Model: CD-R CW-7502 Rev: 4.10
Type: CD-ROM ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 06 Lun: 00
Vendor: IBM Model: DDRS-34560W Rev: S97B
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 10 Lun: 00
Vendor: IBM Model: DDRS-39130D Rev: DC1B
Type: Direct-Access ANSI SCSI revision: 02

[7.7] hotplug version : hotplug-2001_04_24-1_7.x (binary RPM)

[8.] Workaround : rename /etc/hotplug/pci.rc for example with /etc/hotplug/pci.not-rc. This disable PCI hotplug but keeps USB hotplugging

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Do you mean a kernel with the PCI hotplug controller patch that is at http://www.kroah.com/linux/hotplug/ ?

Or just the CONFIG_HOTPLUG selection enabled?

thanks,

greg k-h

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Curious. If anything, I'd expect it to say
"pcimodules is scanning more than 00:00.0".
(The last version I saw didn't have a way to
scan for modules appropriate to a particular
PCI slot, and the hotplug scripts warn about
that limitation.)

You might try renaming "pcimodules" to "pcimodules-" to see if that changes any interesting behavior. I notice you're using RedHat with 7.1 and usb-uhci. I seem to recall that Kudzu wanted to do some hotplug-ish things; they may not play well together yet.

- Dave

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I was a bit lazy, writing by memory : you are right the system says

"pcimodules is scanning more than 00:00.0"

but onluy this line and crashes. Under 2.4.6, it scans all the pci adresses.

Renaming pcimodules to pcimodules- leads to " ** can't synthesize pci hotplug events".

On my system, kudzu is started after hotplug, so the problem seems not linked with that,
since it crashes even during boot, very early, just after fsck.

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Then you should be able to try reproducing this by hand, without hotplug scripts at all. Is it "pcimodules" that's making it crash? Or is it the subsequent "modprobe" commands? Neither of those is supposed to be able to crash the kernel.

You should be able to track this down pretty easily. Disable the /etc/hotplug/pci.rc script for a moment ("pci.rc-"), boot, then run it by hand like "sh -x pci.rc start". That's pretty much the way it's done at boot time, except that by passing the "-x" you get some nice debug output, and will be able to see what user mode command caused the crash.

- Dave

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The offending command is "/sbin/modprobe ohci1394".

Thank you for your help.

I will dig around ieee1394 tomorrow.

Regards,

Pierre
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