[Please CC to me directly, I'm not on the linix kernel mailing list]
[1.] One line summary of the problem:
2.6test11 kernel panic on "head -1 /proc/net/tcp"
[2.] Full description of the problem/report:
Simply boot kernel 2.6test11 (got the same with test10) and type
"head -1 /proc/net/tcp". The system hangs hard with a message:
"bad: scheduling while atomic!
Call Trace:
schedule+0x55d/0x570
There is a long call trace following that.
Doing "cat /proc/net/tcp" before that doesn't cause any problem.
The problem is persistant - it happens every time I tried this.
I tried both a kernel with and without pre-emption.
[3.] Keywords (i.e., modules, networking, kernel):
2.6test11, /proc filesystem, head
[4.] Kernel version (from /proc/version):
Linux version 2.6.0-test11-nopreempt (root@picton) (gcc version 3.3.2
(Debian)) #1 Fri Nov 28 11:33:40 IST 2003
[5.] Output of Oops.. message (if applicable) with symbolic information
resolved (see Documentation/oops-tracing.txt)
Just the first line:
Call Trace:
schedule+0x55d/0x570
[6.] A small shell script or example program which triggers the
problem (if possible)
"head -1 /proc/net/tcp"
[7.] Environment
[7.1.] Software (add the output of the ver_linux script here)
Linux picton 2.6.0-test11-nopreempt #1 Fri Nov 28 11:33:40 IST 2003 i686
GNU/Linux
Gnu C 3.3.2
Gnu make 3.80
util-linux 2.12
mount 2.12
module-init-tools 0.9.15-pre3
e2fsprogs 1.35-WIP
PPP 2.4.2b3
Linux C Library 2.3.2
Dynamic linker (ldd) 2.3.2
Procps 3.1.14
Net-tools 1.60
Console-tools 0.2.3
Sh-utils 5.0.91
Modules Loaded sr_mod cdrom radeon ohci_hcd snd_seq_oss
snd_seq_midi_event snd_seq snd_pcm_oss snd_mixer_oss snd_intel8x0
snd_pcm snd_timer snd_ac97_codec snd_page_alloc snd_mpu401_uart
snd_rawmidi snd_seq_device snd
[7.2.] Processor information (from /proc/cpuinfo):
processor : 0
vendor_id : AuthenticAMD
cpu family : 6
model : 10
model name : AMD Athlon(tm) XP 2500+
stepping : 0
cpu MHz : 1830.191
cache size : 512 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 : 3620.86
[7.3.] Module information (from /proc/modules):
sr_mod 16164 1 - Live 0xe0a51000
cdrom 34720 1 sr_mod, Live 0xe0a5d000
radeon 117676 34 - Live 0xe0a75000
ohci_hcd 26688 0 - Live 0xe0a49000
snd_seq_oss 36160 0 - Live 0xe09f4000
snd_seq_midi_event 7552 1 snd_seq_oss, Live 0xe09e4000
snd_seq 59664 4 snd_seq_oss,snd_seq_midi_event, Live 0xe0a30000
snd_pcm_oss 61668 0 - Live 0xe0a1f000
snd_mixer_oss 21056 2 snd_pcm_oss, Live 0xe09a0000
snd_intel8x0 24676 1 - Live 0xe09c3000
snd_pcm 104228 2 snd_pcm_oss,snd_intel8x0, Live 0xe0a04000
snd_timer 26116 2 snd_seq,snd_pcm, Live 0xe09cc000
snd_ac97_codec 53508 1 snd_intel8x0, Live 0xe09d5000
snd_page_alloc 12292 2 snd_intel8x0,snd_pcm, Live 0xe09be000
snd_mpu401_uart 7616 1 snd_intel8x0, Live 0xe099d000
snd_rawmidi 25824 1 snd_mpu401_uart, Live 0xe09b6000
snd_seq_device 8456 3 snd_seq_oss,snd_seq,snd_rawmidi, Live 0xe0999000
snd 53476 12
snd_seq_oss,snd_seq_midi_event,snd_seq,snd_pcm_oss,snd_mixer_oss,snd_intel8x0,snd_pcm,snd_timer,snd_ac97_codec,snd_mpu401_uart,snd_rawmidi,snd_seq_device,
Live 0xe09a7000
I also tried this from single user, when most modules are not loaded.
[7.4.] Loaded driver and hardware information (/proc/ioports, /proc/iomem)
/proc/ioports:
0000-001f : dma1
0020-0021 : pic1
0040-005f : timer
0060-006f : keyboard
0070-0077 : rtc
0080-008f : dma page reg
00a0-00a1 : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : ide1
01f0-01f7 : ide0
0376-0376 : ide1
0378-037a : parport0
03c0-03df : vga+
03f6-03f6 : ide0
0cf8-0cff : PCI conf1
1c00-1c07 : nForce2 SMBus
2000-2007 : nForce2 SMBus
9000-9fff : PCI Bus #01
9000-907f : 0000:01:07.0
9000-907f : 0000:01:07.0
9400-947f : 0000:01:08.0
9400-947f : 0000:01:08.0
a000-afff : PCI Bus #02
a000-a0ff : 0000:02:00.0
b000-b0ff : 0000:00:06.0
b400-b47f : 0000:00:06.0
b400-b43f : NVidia nForce2 - Controller
c000-c01f : 0000:00:01.1
c400-c407 : 0000:00:04.0
f000-f00f : 0000:00:09.0
f000-f007 : ide0
f008-f00f : ide1
/proc/iomem:
00000000-0009fbff : System RAM
0009fc00-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000f0000-000fffff : System ROM
00100000-1ffeffff : System RAM
00100000-002feecd : Kernel code
002feece-003a813f : Kernel data
1fff0000-1fff2fff : ACPI Non-volatile Storage
1fff3000-1fffffff : ACPI Tables
d0000000-d3ffffff : 0000:00:00.0
d4000000-dbffffff : PCI Bus #02
d4000000-d7ffffff : 0000:02:00.0
d8000000-dbffffff : 0000:02:00.1
dc000000-ddffffff : PCI Bus #02
dd000000-dd00ffff : 0000:02:00.0
dd010000-dd01ffff : 0000:02:00.1
de000000-dfffffff : PCI Bus #01
df000000-df00007f : 0000:01:07.0
df001000-df00107f : 0000:01:08.0
e0000000-e0000fff : 0000:00:04.0
e0001000-e0001fff : 0000:00:06.0
e0001000-e00011ff : NVidia nForce2 - AC'97
e0003000-e0003fff : 0000:00:02.0
e0003000-e0003fff : ohci_hcd
e0004000-e0004fff : 0000:00:02.1
e0004000-e0004fff : ohci_hcd
e0005000-e00050ff : 0000:00:02.2
e0005000-e00050ff : ehci_hcd
fec00000-fec00fff : reserved
fee00000-fee00fff : reserved
ffff0000-ffffffff : reserved
[7.5.] PCI information ('lspci -vvv' as root)
00:00.0 Host bridge: nVidia Corporation nForce2 AGP (different version?)
(rev c1)
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Region 0: Memory at d0000000 (32-bit, prefetchable) [size=64M]
Capabilities: [40] AGP version 2.0
Status: RQ=32 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64-
HTrans- 64bit- FW+ AGP3- Rate=x1,x2,x4
Command: RQ=1 ArqSz=0 Cal=0 SBA+ AGP+ GART64- 64bit-
FW- Rate=x4
Capabilities: [60] #08 [2001]
00:00.1 RAM memory: nVidia Corporation nForce2 Memory Controller 1 (rev c1)
Subsystem: nVidia Corporation: Unknown device 0c17
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
00:00.2 RAM memory: nVidia Corporation nForce2 Memory Controller 4 (rev c1)
Subsystem: nVidia Corporation: Unknown device 0c17
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
00:00.3 RAM memory: nVidia Corporation nForce2 Memory Controller 3 (rev c1)
Subsystem: nVidia Corporation: Unknown device 0c17
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
00:00.4 RAM memory: nVidia Corporation nForce2 Memory Controller 2 (rev c1)
Subsystem: nVidia Corporation: Unknown device 0c17
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
00:00.5 RAM memory: nVidia Corporation nForce2 Memory Controller 5 (rev c1)
Subsystem: nVidia Corporation: Unknown device 0c17
Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
00:01.0 ISA bridge: nVidia Corporation nForce2 ISA Bridge (rev a4)
Subsystem: Giga-byte Technology: Unknown device 0c11
Control: I/O+ Mem+ BusMaster+ SpecCycle+ MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Capabilities: [48] #08 [01e1]
00:01.1 SMBus: nVidia Corporation nForce2 SMBus (MCP) (rev a2)
Subsystem: Giga-byte Technology: Unknown device 0c11
Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Interrupt: pin A routed to IRQ 5
Region 0: I/O ports at c000 [size=32]
Capabilities: [44] 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-
00:02.0 USB Controller: nVidia Corporation nForce2 USB Controller (rev
a4) (prog-if 10 [OHCI])
Subsystem: Giga-byte Technology: Unknown device 5004
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0 (750ns min, 250ns max)
Interrupt: pin A routed to IRQ 11
Region 0: Memory at e0003000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [44] 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-
00:02.1 USB Controller: nVidia Corporation nForce2 USB Controller (rev
a4) (prog-if 10 [OHCI])
Subsystem: Giga-byte Technology: Unknown device 5004
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0 (750ns min, 250ns max)
Interrupt: pin B routed to IRQ 9
Region 0: Memory at e0004000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [44] 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-
00:02.2 USB Controller: nVidia Corporation nForce2 USB Controller (rev
a4) (prog-if 20 [EHCI])
Subsystem: Giga-byte Technology: Unknown device 5004
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0 (750ns min, 250ns max)
Interrupt: pin C routed to IRQ 5
Region 0: Memory at e0005000 (32-bit, non-prefetchable) [size=256]
Capabilities: [44] #0a [2080]
Capabilities: [80] 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-
00:04.0 Ethernet controller: nVidia Corporation nForce2 Ethernet
Controller (rev a1)
Subsystem: Giga-byte Technology: Unknown device e000
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0 (250ns min, 5000ns max)
Interrupt: pin A routed to IRQ 11
Region 0: Memory at e0000000 (32-bit, non-prefetchable) [size=4K]
Region 1: I/O ports at c400 [size=8]
Capabilities: [44] 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-
00:06.0 Multimedia audio controller: nVidia Corporation nForce2 AC97
Audio Controler (MCP) (rev a1)
Subsystem: nVidia Corporation: Unknown device 4144
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0 (500ns min, 1250ns max)
Interrupt: pin A routed to IRQ 11
Region 0: I/O ports at b000 [size=256]
Region 1: I/O ports at b400 [size=128]
Region 2: Memory at e0001000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [44] 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-
00:08.0 PCI bridge: nVidia Corporation nForce2 External PCI Bridge (rev
a3) (prog-if 00 [Normal decode])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR+ FastB2B-
Status: Cap- 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=32
I/O behind bridge: 00009000-00009fff
Memory behind bridge: de000000-dfffffff
Prefetchable memory behind bridge: fff00000-000fffff
BridgeCtl: Parity- SERR+ NoISA- VGA- MAbort- >Reset- FastB2B-
00:09.0 IDE interface: nVidia Corporation nForce2 IDE (rev a2) (prog-if
8a [Master SecP PriP])
Subsystem: Giga-byte Technology: Unknown device 5002
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0 (750ns min, 250ns max)
Region 4: I/O ports at f000 [size=16]
Capabilities: [44] 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-
00:1e.0 PCI bridge: nVidia Corporation nForce2 AGP (rev c1) (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: 32
Bus: primary=00, secondary=02, subordinate=02, sec-latency=32
I/O behind bridge: 0000a000-0000afff
Memory behind bridge: dc000000-ddffffff
Prefetchable memory behind bridge: d4000000-dbffffff
BridgeCtl: Parity- SERR+ NoISA- VGA+ MAbort- >Reset- FastB2B-
01:07.0 Ethernet controller: 3Com Corporation 3c905B 100BaseTX [Cyclone]
(rev 28)
Subsystem: 3Com Corporation 3C905B Fast Etherlink XL 10/100
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 (2500ns min, 2500ns max), Cache Line Size: 0x08 (32
bytes)
Interrupt: pin A routed to IRQ 9
Region 0: I/O ports at 9000 [size=128]
Region 1: Memory at df000000 (32-bit, non-prefetchable) [size=128]
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-
01:08.0 Ethernet controller: 3Com Corporation 3c905B 100BaseTX [Cyclone]
(rev 30)
Subsystem: 3Com Corporation 3C905B Fast Etherlink XL 10/100
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 (2500ns min, 2500ns max), Cache Line Size: 0x08 (32
bytes)
Interrupt: pin A routed to IRQ 5
Region 0: I/O ports at 9400 [size=128]
Region 1: Memory at df001000 (32-bit, non-prefetchable) [size=128]
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-
02:00.0 VGA compatible controller: ATI Technologies Inc Radeon R250 If
[Radeon 9000] (rev 01) (prog-if 00 [VGA])
Subsystem: Giga-byte Technology: Unknown device 4010
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), Cache Line Size: 0x08 (32 bytes)
Interrupt: pin A routed to IRQ 9
Region 0: Memory at d4000000 (32-bit, prefetchable) [size=64M]
Region 1: I/O ports at a000 [size=256]
Region 2: Memory at dd000000 (32-bit, non-prefetchable) [size=64K]
Expansion ROM at <unassigned> [disabled] [size=128K]
Capabilities: [58] AGP version 2.0
Status: RQ=48 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64-
HTrans- 64bit- FW+ AGP3- Rate=x1,x2,x4
Command: RQ=32 ArqSz=0 Cal=0 SBA+ AGP+ GART64- 64bit-
FW- Rate=x4
Capabilities: [50] 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-
02:00.1 Display controller: ATI Technologies Inc Radeon R250 [Radeon
9000] (Secondary) (rev 01)
Subsystem: Giga-byte Technology: Unknown device 4011
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), Cache Line Size: 0x08 (32 bytes)
Region 0: Memory at d8000000 (32-bit, prefetchable) [disabled]
[size=64M]
Region 1: Memory at dd010000 (32-bit, non-prefetchable)
[disabled] [size=64K]
Capabilities: [50] 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-
[7.6.] SCSI information (from /proc/scsi/scsi)
There is no /proc/scsi/scsi file on my system.
It's a non-scsi system. I do use SCSI to access the CD writer and USB.
Maybe the "REPORTING-BUG" file should be updated to direct to files
under /sys?
[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 think that turning APIC on causes problems on my system, so it's off,
even local APIC.
I use a single large ReiserFS filesystem on an 80Gb Maxtor disk.
No Windows installed on this system.
[X.] Other notes, patches, fixes, workarounds:
I think this is a critical bug because any user on the system can cause
it to crash.
I can try to copy the call trace by hand if you think you must have it
in order to analyze the problem.
Thanks,
--Amos
[email protected] writes:
> "bad: scheduling while atomic!
> Call Trace:
> schedule+0x55d/0x570
Does this patch fix this problem?
diff -puN net/ipv4/tcp_ipv4.c~tcp_seq-oops-fix net/ipv4/tcp_ipv4.c
--- linux-2.6.0-test11/net/ipv4/tcp_ipv4.c~tcp_seq-oops-fix 2003-11-29 00:52:15.000000000 +0900
+++ linux-2.6.0-test11-hirofumi/net/ipv4/tcp_ipv4.c 2003-11-29 00:52:28.000000000 +0900
@@ -2356,6 +2356,7 @@ static void *tcp_get_idx(struct seq_file
static void *tcp_seq_start(struct seq_file *seq, loff_t *pos)
{
struct tcp_iter_state* st = seq->private;
+ st->state = TCP_SEQ_STATE_LISTENING;
st->num = 0;
return *pos ? tcp_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
}
_
--
OGAWA Hirofumi <[email protected]>
OGAWA Hirofumi wrote:
> [email protected] writes:
>
>
>>"bad: scheduling while atomic!
>>Call Trace:
>> schedule+0x55d/0x570
>
>
> Does this patch fix this problem?
>
> diff -puN net/ipv4/tcp_ipv4.c~tcp_seq-oops-fix net/ipv4/tcp_ipv4.c
> --- linux-2.6.0-test11/net/ipv4/tcp_ipv4.c~tcp_seq-oops-fix 2003-11-29 00:52:15.000000000 +0900
> +++ linux-2.6.0-test11-hirofumi/net/ipv4/tcp_ipv4.c 2003-11-29 00:52:28.000000000 +0900
> @@ -2356,6 +2356,7 @@ static void *tcp_get_idx(struct seq_file
> static void *tcp_seq_start(struct seq_file *seq, loff_t *pos)
> {
> struct tcp_iter_state* st = seq->private;
> + st->state = TCP_SEQ_STATE_LISTENING;
> st->num = 0;
> return *pos ? tcp_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
> }
>
> _
Partially. It seems to trigger ppp failure later.
What I do to test this:
1. Compiled a pre-emptive kernel with nothing different in the config
and the code except that I added your patch.
2. Boot to single user mode as before.
3. "cat /proc/net/tcp" runs fine.
4. "head -1 /proc/net/tcp" runs fine (it used to freeze with an oops, as
described in my original message).
5. I logout from single user mode and let the system boot to multi-user.
This gives me tons of messages like the following:
Badness in local_bh_enable at kernel/softirq.c:121
Call Trace:
[<c011df25>] local_bh_enable+0x85/0x90
[<c02315e2>] ppp_async_push+0xa2/0x180
[<c0230efd>] ppp_asynctty_wakeup+0x2d/0x60
[<c0202638>] pty_unthrottle+0x58/0x60
[<c01ff0fd>] check_unthrottle+0x3d/0x40
[<c01ff1a3>] n_tty_flush_buffer+0x13/0x60
[<c0202a47>] pty_flush_buffer+0x67/0x70
[<c01fba41>] do_tty_hangup+0x3f1/0x460
[<c01fcfbc>] release_dev+0x62c/0x660
[<c013dfab>] zap_pmd_range+0x4b/0x70
[<c013e013>] unmap_page_range+0x43/0x70
[<c01622a2>] dput+0x22/0x210
[<c01fd38a>] tty_release+0x2a/0x60
[<c014ccf8>] __fput+0x108/0x120
[<c014b359>] filp_close+0x59/0x90
[<c011b874>] put_files_struct+0x54/0xc0
[<c011c47d>] do_exit+0x15d/0x3e0
[<c011c79a>] do_group_exit+0x3a/0xb0
[<c01091b7>] syscall_call+0x7/0xb
PPP fails. Re-run "pon adsl-provider" or "/etc/init.d/ppp start" fails.
What I get on such attempts are messages in /var/log/messages
like:
Nov 29 18:48:57 picton kernel: Badness in local_bh_enable at
kernel/softirq.c:121
Nov 29 18:48:57 picton kernel: Call Trace:
Nov 29 18:48:57 picton kernel: [local_bh_enable+133/144]
local_bh_enable+0x85/0x90
Nov 29 18:48:57 picton kernel: [ppp_async_push+162/384]
ppp_async_push+0xa2/0x180
Nov 29 18:48:57 picton kernel: [ppp_asynctty_wakeup+45/96]
ppp_asynctty_wakeup+0x2d/0x60
Nov 29 18:48:57 picton kernel: [pty_unthrottle+88/96]
pty_unthrottle+0x58/0x60
Nov 29 18:48:57 picton kernel: [check_unthrottle+61/64]
check_unthrottle+0x3d/0x40
Nov 29 18:48:57 picton kernel: [n_tty_flush_buffer+19/96]
n_tty_flush_buffer+0x13/0x60
Nov 29 18:48:57 picton kernel: [pty_flush_buffer+103/112]
pty_flush_buffer+0x67/0x70
Nov 29 18:48:57 picton kernel: [do_tty_hangup+1009/1120]
do_tty_hangup+0x3f1/0x460
Nov 29 18:48:57 picton kernel: [release_dev+1580/1632]
release_dev+0x62c/0x660
Nov 29 18:48:57 picton kernel: [zap_pmd_range+75/112]
zap_pmd_range+0x4b/0x70
Nov 29 18:48:57 picton kernel: [unmap_page_range+67/112]
unmap_page_range+0x43/0x70
Nov 29 18:48:57 picton kernel: [dput+34/528] dput+0x22/0x210
Nov 29 18:48:57 picton kernel: [tty_release+42/96] tty_release+0x2a/0x60
Nov 29 18:48:57 picton kernel: [__fput+264/288] __fput+0x108/0x120
Nov 29 18:48:57 picton kernel: [filp_close+89/144] filp_close+0x59/0x90
Nov 29 18:48:57 picton kernel: [put_files_struct+84/192]
put_files_struct+0x54/0xc0
Nov 29 18:48:57 picton kernel: [do_exit+349/992] do_exit+0x15d/0x3e0
Nov 29 18:48:57 picton kernel: [do_group_exit+58/176]
do_group_exit+0x3a/0xb0
Nov 29 18:48:57 picton kernel: [syscall_call+7/11] syscall_call+0x7/0xb
Nov 29 18:48:57 picton kernel:
Nov 29 18:48:57 picton pppd[32717]: Modem hangup
Nov 29 18:48:57 picton pppd[32717]: Connection terminated.
Nov 29 18:48:57 picton pppd[32717]: Exit.
Ksymoops doesn't seem to add much useful data, here is what I get
from it:
Trace; c011df25 <local_bh_enable+85/90>
Trace; c02315e2 <ppp_async_push+a2/180>
Trace; c0230efd <ppp_asynctty_wakeup+2d/60>
Trace; c0202638 <pty_unthrottle+58/60>
Trace; c01ff0fd <check_unthrottle+3d/40>
Trace; c01ff1a3 <n_tty_flush_buffer+13/60>
Trace; c0202a47 <pty_flush_buffer+67/70>
Trace; c01fba41 <do_tty_hangup+3f1/460>
Trace; c01fcfbc <release_dev+62c/660>
Trace; c013dfab <zap_pmd_range+4b/70>
Trace; c013e013 <unmap_page_range+43/70>
Trace; c01622a2 <dput+22/210>
Trace; c01fd38a <tty_release+2a/60>
Trace; c014ccf8 <__fput+108/120>
Trace; c014b359 <filp_close+59/90>
Trace; c011b874 <put_files_struct+54/c0>
Trace; c011c47d <do_exit+15d/3e0>
Trace; c011c79a <do_group_exit+3a/b0>
Trace; c01091b7 <syscall_call+7/b>
If I avoid doing the "head -1 /proc/net/tcp" in single user then PPP
works.
Thanks,
--Amos
On Sat, 2003-11-29 at 18:00, [email protected] wrote:
> Partially. It seems to trigger ppp failure later.
[...]
> This gives me tons of messages like the following:
>
> Badness in local_bh_enable at kernel/softirq.c:121
> Call Trace:
> [<c011df25>] local_bh_enable+0x85/0x90
> [<c02315e2>] ppp_async_push+0xa2/0x180
> [<c0230efd>] ppp_asynctty_wakeup+0x2d/0x60
> [<c0202638>] pty_unthrottle+0x58/0x60
> [<c01ff0fd>] check_unthrottle+0x3d/0x40
> [<c01ff1a3>] n_tty_flush_buffer+0x13/0x60
> [<c0202a47>] pty_flush_buffer+0x67/0x70
> [<c01fba41>] do_tty_hangup+0x3f1/0x460
> [<c01fcfbc>] release_dev+0x62c/0x660
> [<c013dfab>] zap_pmd_range+0x4b/0x70
> [<c013e013>] unmap_page_range+0x43/0x70
> [<c01622a2>] dput+0x22/0x210
> [<c01fd38a>] tty_release+0x2a/0x60
> [<c014ccf8>] __fput+0x108/0x120
> [<c014b359>] filp_close+0x59/0x90
> [<c011b874>] put_files_struct+0x54/0xc0
> [<c011c47d>] do_exit+0x15d/0x3e0
> [<c011c79a>] do_group_exit+0x3a/0xb0
> [<c01091b7>] syscall_call+0x7/0xb
I just looked at my logs and realised I add a similar oops in my log. It
happened a few days ago on 2.6.0-test10 (I failed to notice because
everything seems to work fine).
Here is what I have :
Badness in local_bh_enable at kernel/softirq.c:121
Call Trace:
[<c01251d3>] local_bh_enable+0x93/0xa0
[<f997dced>] ppp_async_push+0xbd/0x1b0 [ppp_async]
[<f997d58e>] ppp_asynctty_wakeup+0x2e/0x70 [ppp_async]
[<c01cc619>] pty_unthrottle+0x59/0x60
[<c01c8c1b>] check_unthrottle+0x3b/0x40
[<c01c8cd3>] n_tty_flush_buffer+0x13/0x60
[<c01cca2d>] pty_flush_buffer+0x6d/0x70
[<c01cc9c0>] pty_flush_buffer+0x0/0x70
[<c01c4ee3>] do_tty_hangup+0x4e3/0x580
[<c01c6752>] release_dev+0x742/0x780
[<c013f82c>] __pagevec_free+0x1c/0x30
[<c014487e>] release_pages+0x7e/0x1a0
[<c0171bb1>] dput+0x31/0x270
[<c01c6b7b>] tty_release+0x3b/0x90
[<c015a3db>] __fput+0x10b/0x120
[<c01588e9>] filp_close+0x59/0x90
[<c0122634>] put_files_struct+0x64/0xd0
[<c01233cf>] do_exit+0x19f/0x4c0
[<c01237c2>] do_group_exit+0x42/0xe0
[<c0109539>] sysenter_past_esp+0x52/0x71
The previous line in my logs was from my TI acx100 wifi card. It runs
with the experimental driver from http://acx100.sf.net. So if this oops
can be caused by bad driver behaviour, please ignore.
I am using ppp with pppoe on a ne2k-pci network board.
I have smp (dual-p3) and preemption enabled. The kernel is compiled with
gcc 3.3.1-2 from debian sid.