schedule() problem

snagg
2004-05-15T17:05:48Z

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[1.] schedule() freeze

[2.]because of a failed control the system crashs , maybe the problem is that
the active_mm of a task is NULL .

[3.]scheduler

[4.]Linux version 2.4.22 (root@midas) (gcc version 3.2.3) #6 Tue Sep 2
17:43:01 PDT 2003

[5.]I only have a photo alternauts.altervista.org/schedfault.jpg because after
that the system crashs

[6.]Cannot recreate the problem , sorry

[7.1]
sh scripts/ver_linux
If some fields are empty or look unusual you may have an old version.
Compare to the current minimal requirements in Documentation/Changes.

Linux aVaTaR 2.4.22 #6 Tue Sep 2 17:43:01 PDT 2003 i686 unknown unknown
GNU/Linux

Gnu C 3.3.3
Gnu make 3.80
util-linux 2.12
mount 2.12
modutils 2.4.25
e2fsprogs 1.35
jfsutils 1.1.6
xfsprogs 2.6.10
pcmcia-cs 3.2.7
quota-tools 3.09.
PPP 2.4.2
Linux C Library 2.3.2
Dynamic linker (ldd) 2.3.2
Linux C++ Library 5.0.5
Procps 2.0.18
Net-tools 1.60
Kbd 1.12
Sh-utils 5.2.1
Modules Loaded soundcore appletalk ipx usb-ohci usbcore 8139too mii
crc32 pcmcia_core ide-scsi agpgart

[7.2]
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 1
model name : Intel(R) Pentium(R) 4 CPU 1.70GHz
stepping : 2
cpu MHz : 1716.928
cache size : 256 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
bogomips : 3420.97

[7.3]
soundcore 3332 0 (autoclean)
appletalk 21540 1 (autoclean)
ipx 17348 1 (autoclean)
usb-ohci 18888 0 (unused)
usbcore 58400 1 [usb-ohci]
8139too 15240 1
mii 2304 0 [8139too]
crc32 2880 0 [8139too]
pcmcia_core 40032 0
ide-scsi 9424 0
agpgart 39576 0 (unused)

[7.4]
cat /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
0170-0177 : ide1
01f0-01f7 : ide0
02f8-02ff : serial(auto)
0376-0376 : ide1
03c0-03df : vesafb
03f6-03f6 : ide0
03f8-03ff : serial(auto)
0cf8-0cff : PCI conf1
c000-cfff : PCI Bus #01
c000-c07f : Silicon Integrated Systems [SiS] SiS65x/M650/740 PCI/AGP VGA
Display Adapter
d800-d8ff : Silicon Integrated Systems [SiS] Sound Controller
dc00-dc7f : Silicon Integrated Systems [SiS] Sound Controller
e000-e0ff : Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+
e000-e0ff : 8139too
f000-f00f : Silicon Integrated Systems [SiS] 5513 [IDE]
f000-f007 : ide0
f008-f00f : ide1

cat /proc/iomem
00000000-0009fbff : System RAM
0009fc00-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000f0000-000fffff : System ROM
00100000-0dfeffff : System RAM
00100000-002c5635 : Kernel code
002c5636-0035f063 : Kernel data
0dff0000-0dff2fff : ACPI Non-volatile Storage
0dff3000-0dffffff : ACPI Tables
e0000000-e7ffffff : PCI Bus #01
e0000000-e7ffffff : Silicon Integrated Systems [SiS] SiS65x/M650/740 PCI/AGP
VGA Display Adapter
e0000000-e017ffff : vesafb
e8000000-ebffffff : Silicon Integrated Systems [SiS] 650 Host
ec000000-ec0fffff : PCI Bus #01
ec000000-ec01ffff : Silicon Integrated Systems [SiS] SiS65x/M650/740 PCI/AGP
VGA Display Adapter
ec100000-ec100fff : Silicon Integrated Systems [SiS] USB 1.0 Controller
ec100000-ec100fff : usb-ohci
ec101000-ec101fff : Silicon Integrated Systems [SiS] USB 1.0 Controller (#2)
ec101000-ec101fff : usb-ohci
ec102000-ec1020ff : Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+
ec102000-ec1020ff : 8139too
fec00000-fec00fff : reserved
fee00000-fee00fff : reserved
ffff0000-ffffffff : reserved

[7.5]
00:00.0 Host bridge: Silicon Integrated Systems [SiS] 650/M650 Host (rev 01)
Subsystem: Silicon Integrated Systems [SiS] 650/M650 Host
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 e8000000 (32-bit, non-prefetchable) [size=64M]
Capabilities: [c0] 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=<none>

00:01.0 PCI bridge: Silicon Integrated Systems [SiS] Virtual PCI-to-PCI bridge
(AGP) (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: 64
Bus: primary=00, secondary=01, subordinate=01, sec-latency=32
I/O behind bridge: 0000c000-0000cfff
Memory behind bridge: ec000000-ec0fffff
Prefetchable memory behind bridge: e0000000-e7ffffff
BridgeCtl: Parity- SERR+ NoISA+ VGA+ MAbort- >Reset- FastB2B-

00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS85C503/5513 (LPC
Bridge) (rev 10)
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

00:02.2 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller
(rev 07) (prog-if 10 [OHCI])
Subsystem: Silicon Integrated Systems [SiS] USB 1.0 Controller
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 (20000ns max), cache line size 08
Interrupt: pin D routed to IRQ 5
Region 0: Memory at ec100000 (32-bit, non-prefetchable) [size=4K]

00:02.3 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller
(rev 07) (prog-if 10 [OHCI])
Subsystem: Silicon Integrated Systems [SiS] USB 1.0 Controller
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 (20000ns max), cache line size 08
Interrupt: pin A routed to IRQ 11
Region 0: Memory at ec101000 (32-bit, non-prefetchable) [size=4K]

00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE] (rev d0)
(prog-if 80 [Master])
Subsystem: Silicon Integrated Systems [SiS] SiS5513 EIDE Controller
(A,B step)
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: 128
Region 4: I/O ports at f000 [size=16]

00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] Sound
Controller (rev a0)
Subsystem: Giga-byte Technology: Unknown device a001
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 (13000ns min, 2750ns max)
Interrupt: pin C routed to IRQ 9
Region 0: I/O ports at d800 [size=256]
Region 1: I/O ports at dc00 [size=128]
Capabilities: [48] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=55mA
PME(D0-,D1-,D2-,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:10.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL-8139/8139C/8139C+ (rev 10)
Subsystem: Realtek Semiconductor Co., Ltd. RT8139
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 (8000ns min, 16000ns max)
Interrupt: pin A routed to IRQ 11
Region 0: I/O ports at e000 [size=256]
Region 1: Memory at ec102000 (32-bit, non-prefetchable) [size=256]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA
PME(D0-,D1+,D2+,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

01:00.0 VGA compatible controller: Silicon Integrated Systems [SiS]
65x/M650/740 PCI/AGP VGA Display Adapter (prog-if 00 [VGA])
Subsystem: Silicon Integrated Systems [SiS] 65x/M650/740 PCI/AGP VGA
Display Adapter
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 5
BIST result: 00
Region 0: Memory at e0000000 (32-bit, prefetchable) [size=128M]
Region 1: Memory at ec000000 (32-bit, non-prefetchable) [size=128K]
Region 2: I/O ports at c000 [size=128]
Capabilities: [40] 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: [50] AGP version 2.0
Status: RQ=16 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=<none>

[7.6]
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: HL-DT-ST Model: CD-RW GCE-8240B Rev: 1.07
Type: CD-ROM ANSI SCSI revision: 02

[X]
I read the code of sched.c in kernel 2.4.26 and it seems not to be changed in
the section in wich the problem occurs, however I cannot exploit again the
scedule() so I'm not sure that the error is still there.The kernel is the
official slackware ones.

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