FreeBSD 5.2C: LOR - 1st 0xca738038 filedesc structure (filedesc structure) @ /usr/src/sys/kern/sys_generic.c:901

From: Peter Wood <peter_at_alastria.net>
Date: Mon, 26 Jan 2004 17:29:48 +0000
Good Evening,

Checked nightly logs to discover that there had been two lock order reversals
last night on my SMP 5.2C machine.

They are listed as:

lock order reversal
 1st 0xc7975dec vm object (vm object) _at_ /usr/src/sys/vm/swap_pager.c:1314
 2nd 0xc0788d80 swap_pager swhash (swap_pager swhash) _at_
/usr/src/sys/vm/swap_pager.c:1823
 3rd 0xc1042738 vm object (vm object) _at_ /usr/src/sys/vm/uma_core.c:873
Stack backtrace:

lock order reversal
 1st 0xca738038 filedesc structure (filedesc structure) _at_
/usr/src/sys/kern/sys_generic.c:901
 2nd 0xc0752d80 Giant (Giant) _at_ /usr/src/sys/fs/specfs/spec_vnops.c:377
Stack backtrace:

The backtrace for the second LOR was thankfully still on screen, I've taken a
screen shot and it can be located at:

http://parallax.alastria.net/~peter/xenon-lor1.jpg

I'm going to cvsup to current shortly, I'm interested in trying the new
schedular. If anyone from core needs access to the machine to poke, let me
know.

Kind regards,

Peter.

Machine dmesg is as follows:

Copyright (c) 1992-2004 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
        The Regents of the University of California. All rights reserved.
FreeBSD 5.2-CURRENT #3: Sat Jan 17 16:15:10 GMT 2004
    pa_at_xenon.talbot.lan:/usr/src/sys/i386/compile/XENON
Preloaded elf kernel "/boot/kernel/kernel" at 0xc087a000.
Preloaded elf module "/boot/kernel/acpi.ko" at 0xc087a294.
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: AMD Athlon(tm) MP 2000+ (1666.74-MHz 686-class CPU)
  Origin = "AuthenticAMD"  Id = 0x662  Stepping = 2

Features=0x383fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CM
OV,PAT,PSE36,MMX,FXSR,SSE>
  AMD Features=0xc0480000<MP,AMIE,DSP,3DNow!>
real memory  = 2146959360 (2047 MB)
avail memory = 2095476736 (1998 MB)
ACPI APIC Table: <PTLTD          APIC  >
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
 cpu0 (BSP): APIC ID:  1
 cpu1 (AP): APIC ID:  0
ioapic0 <Version 1.1> irqs 0-23 on motherboard
Pentium Pro MTRR support enabled
npx0: [FAST]
npx0: <math processor> on motherboard
npx0: INT 16 interface
acpi0: <PTLTD   RSDT> on motherboard
pcibios: BIOS version 2.10
acpi0: Power Button (fixed)
acpi0: Sleep Button (fixed)
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x8008-0x800b on acpi0
acpi_cpu0: <CPU> port 0x530-0x537 on acpi0
acpi_cpu1: <CPU> port 0x530-0x537 on acpi0
acpi_button0: <Power Button> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0x8080-0x80ff,0x8000-0x807f,0xcf8-0xcff
iomem
 0xd8000-0xdbfff on acpi0
pci0: <ACPI PCI bus> on pcib0
agp0: <AMD 762 host to AGP bridge> port 0x1010-0x1013 mem
0xf1300000-0xf1300fff,
0xf4000000-0xf7ffffff at device 0.0 on pci0
pcib1: <ACPI PCI-PCI bridge> at device 1.0 on pci0
pci1: <ACPI PCI bus> on pcib1
pci1: <display, VGA> at device 5.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <AMD 768 UDMA100 controller> port 0xf000-0xf00f at device 7.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata0: [MPSAFE]
ata1: at 0x170 irq 15 on atapci0
ata1: [MPSAFE]
pci0: <bridge, PCI-unknown> at device 7.3 (no driver attached)
pcib2: <PCI-PCI bridge> at device 9.0 on pci0
pci2: <PCI bus> on pcib2
asr0: <Adaptec Caching SCSI RAID> mem 0xf8000000-0xfbffffff irq 21 at device
9.1 on pci0
asr0: major=154
asr0: ADAPTEC 2400A FW Rev. 370L, 4 channel, 256 CCBs, Protocol I2O
pcib3: <ACPI PCI-PCI bridge> at device 16.0 on pci0
pci3: <ACPI PCI bus> on pcib3
pci3: <serial bus, USB> at device 0.0 (no driver attached)
atapci1: <Promise PDC20268 UDMA100 controller> port
0x2480-0x248f,0x2490-0x2493,
0x2498-0x249f,0x2494-0x2497,0x24a0-0x24a7 mem 0xf1000000-0xf1003fff irq 16 at
device 4.0 on pci3
atapci1: [MPSAFE]
ata2: at 0x24a0 on atapci1
ata2: [MPSAFE]
ata3: at 0x2498 on atapci1
ata3: [MPSAFE]
ahc0: <Adaptec 2902/04/10/15/20C/30C SCSI adapter> port 0x2000-0x20ff mem
0xf100
5000-0xf1005fff irq 17 at device 5.0 on pci3
ahc0: Host Adapter Bios disabled.  Using default SCSI device parameters
aic7850: Single Channel A, SCSI Id=7, 3/253 SCBs
pcm0: <AudioPCI ES1370> port 0x2400-0x243f irq 18 at device 6.0 on pci3
fxp0: <Intel 82550 Pro/100 Ethernet> port 0x2440-0x247f mem
0xf1020000-0xf103fff
f,0xf1006000-0xf1006fff irq 19 at device 7.0 on pci3
fxp0: Ethernet address 00:02:b3:b4:4c:bb
miibus0: <MII bus> on fxp0
inphy0: <i82555 10/100 media interface> on miibus0
inphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60 irq 1 on acpi0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
sio0 port 0x3f8-0x3ff irq 4 on acpi0
sio0: type 16550A
sio1 port 0x2f8-0x2ff irq 3 on acpi0
sio1: type 16550A
ppc0 port 0x778-0x77f,0x378-0x37f irq 7 drq 3 on acpi0
ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode
ppc0: FIFO with 16/16/9 bytes threshold
ppbus0: <Parallel port bus> on ppc0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
fdc0: <Enhanced floppy controller (i82077, NE72065 or clone)> port
0x3f7,0x3f0-0
x3f5 irq 6 drq 2 on acpi0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
orm0: <Option ROMs> at iomem
0xe0000-0xe3fff,0xce000-0xcffff,0xc8000-0xcdfff,0xc
0000-0xc7fff on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
Timecounters tick every 10.000 msec
acd0: DVDROM <Pioneer DVD-ROM ATAPIModel DVD-117 0107> at ata0-master UDMA66
GEOM: create disk ad4 dp=0xc77be660
ad4: 114473MB <WDC WD1200JB-00DUA3> [232581/16/63] at ata2-master UDMA100
GEOM: create disk ad6 dp=0xc77be460
ad6: 58644MB <IC35L060AVER07-0> [119150/16/63] at ata3-master UDMA100
Waiting 5 seconds for SCSI devices to settle
sa0 at ahc0 bus 0 target 4 lun 0
sa0: <Quantum DLT4000 CPQ DRV D473> Removable Sequential Access SCSI-2 device
sa0: 10.000MB/s transfers (10.000MHz, offset 15)
GEOM: create disk cd0 dp=0xc7448600
GEOM: create disk da0 dp=0xc77e5450
da0 at asr0 bus 0 target 0 lun 0
da0: <ADAPTEC RAID-5 370L> Fixed Direct Access SCSI-2 device
da0: Tagged Queueing Enabled
da0: 343419MB (703322112 512 byte sectors: 255H 63S/T 43779C)
SMP: AP CPU #1 Launched!
cd0 at ahc0 bus 0 target 2 lun 0
cd0: <YAMAHA CRW8824S 1.00> Removable CD-ROM SCSI-2 device
cd0: 10.000MB/s transfers (10.000MHz, offset 15)
cd0: Attempt to query device size failed: NOT READY, Medium not present - tray
closed
Mounting root from ufs:/dev/ad4s1a
-- 
Peter Wood <peter_at_alastria.net> :: Tel +44 7974 799440
Received on Mon Jan 26 2004 - 08:31:08 UTC

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