[6.0b5/amd64] ls /otherdir/dev induces panic

Jon Dama jd at ugcs.caltech.edu
Fri Oct 14 02:07:20 PDT 2005

The following sequence induces an instant panic:

1) machine just up, no load
2) mount_devfs devfs /test/dev
3) chroot /test /bin/sh
4) ls /dev

panic: kmem_malloc(-1905729536): kmem_map too small: 6881290 total

Dumping 8191 MB (3 chunks)
  chunk 0: 1MB (156 pages)

   ( dump fails to finish )

Kernel: GENERIC AMD64 6.0 Beta 5

I am aware of the VM_KMEM_SIZE_MAX kernel setting, but thought I'd drop a
line on the list now because kmem_malloc(-1905729536) seems rather unusual
to me.



sysctl -a | grep kmem
vm.kmem_size_scale: 3
vm.kmem_size_max: 419430400
vm.kmem_size: 419430400

Copyright (c) 1992-2005 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 6.0-BETA5 #0: Sat Oct  8 15:44:03 PDT 2005
    xxx at xxxx:/usr/obj/usr/src/sys/SHELL
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: AMD Opteron(tm) Processor 250 (2390.61-MHz K8-class CPU)
  Origin = "AuthenticAMD"  Id = 0xf5a  Stepping = 10

  AMD Features=0xe0500800<SYSCALL,NX,MMX+,LM,3DNow+,3DNow>
real memory  = 9663676416 (9216 MB)
avail memory = 8285224960 (7901 MB)
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  1
MADT: Forcing active-low polarity and level trigger for SCI
ioapic0 <Version 1.1> irqs 0-23 on motherboard
ioapic1 <Version 1.1> irqs 24-27 on motherboard
ioapic2 <Version 1.1> irqs 28-31 on motherboard
acpi0: <A M I OEMRSDT> on motherboard
acpi0: Power Button (fixed)
pci_link0: <ACPI PCI Link LNKA> irq 11 on acpi0
pci_link1: <ACPI PCI Link LNKB> irq 10 on acpi0
pci_link2: <ACPI PCI Link LNKC> irq 0 on acpi0
pci_link3: <ACPI PCI Link LNKD> irq 9 on acpi0
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x5008-0x500b on acpi0
cpu0: <ACPI CPU> on acpi0
acpi_throttle0: <ACPI CPU Throttling> on cpu0
cpu1: <ACPI CPU> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
pcib1: <ACPI PCI-PCI bridge> at device 6.0 on pci0
pci3: <ACPI PCI bus> on pcib1
ohci0: <OHCI (generic) USB controller> mem 0xfc8fd000-0xfc8fdfff irq 19 at
e 0.0 on pci3
usb0: OHCI version 1.0, legacy support
usb0: SMM does not respond, resetting
usb0: <OHCI (generic) USB controller> on ohci0
usb0: USB revision 1.0
uhub0: AMD OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 3 ports with 3 removable, self powered
ohci1: <OHCI (generic) USB controller> mem 0xfc8fe000-0xfc8fefff irq 19 at
e 0.1 on pci3
usb1: OHCI version 1.0, legacy support
usb1: SMM does not respond, resetting
usb1: <OHCI (generic) USB controller> on ohci1
usb1: USB revision 1.0
uhub1: AMD OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 3 ports with 3 removable, self powered
atapci0: <SiI 3114 SATA150 controller> port
xb407,0xb000-0xb003,0xac00-0xac0f mem 0xfc8ffc00-0xfc8fffff irq 17 at
device 11.
0 on pci3
ata2: <ATA channel 0> on atapci0
ata3: <ATA channel 1> on atapci0
ata4: <ATA channel 2> on atapci0
ata5: <ATA channel 3> on atapci0
isab0: <PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci1: <AMD 8111 UDMA133 controller> port
0xffa0-0xffaf at device 7.1 on pci0
ata0: <ATA channel 0> on atapci1
ata1: <ATA channel 1> on atapci1
pci0: <serial bus, SMBus> at device 7.2 (no driver attached)
pci0: <bridge> at device 7.3 (no driver attached)
pci0: <multimedia, audio> at device 7.5 (no driver attached)
pcib2: <ACPI PCI-PCI bridge> at device 10.0 on pci0
pci2: <ACPI PCI bus> on pcib2
bge0: <Broadcom BCM5703 Gigabit Ethernet, ASIC rev. 0x1002> mem
fffff irq 24 at device 9.0 on pci2
miibus0: <MII bus> on bge0
brgphy0: <BCM5703 10/100/1000baseTX PHY> on miibus0
brgphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseTX,
-FDX, auto
bge0: Ethernet address: 00:e0:81:2d:a3:dc
pci0: <base peripheral, interrupt controller> at device 10.1 (no driver
pcib3: <ACPI PCI-PCI bridge> at device 11.0 on pci0
pci1: <ACPI PCI bus> on pcib3
pci0: <base peripheral, interrupt controller> at device 11.1 (no driver
pcib4: <ACPI Host-PCI bridge> on acpi0
pci4: <ACPI PCI bus> on pcib4
agp0: <AMD 8151 AGP graphics tunnel> mem 0xf0000000-0xf7ffffff at device
0.0 on
pcib5: <ACPI PCI-PCI bridge> at device 1.0 on pci4
pci5: <ACPI PCI bus> on pcib5
pci5: <display, VGA> at device 0.0 (no driver attached)
acpi_button0: <Power Button> on acpi0
sio0: configured irq 4 not in bitmap of probed irqs 0
sio0: port may not be enabled
sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on
sio0: type 16550A
sio1: configured irq 3 not in bitmap of probed irqs 0
sio1: port may not be enabled
sio1: <16550A-compatible COM port> port 0x2f8-0x2ff irq 3 on acpi0
sio1: type 16550A
fdc0: <floppy drive controller (FDE)> port 0x3f0-0x3f5,0x3f7 irq 6 drq 2
on acpi
fdc0: [FAST]
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
orm0: <ISA Option ROMs> at iomem 0xc0000-0xc97ff,0xc9800-0xcdfff on isa0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
ppc0: cannot reserve I/O port range
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
uhub2: NMB Dell USB Keyboard Hub, class 9/0, rev 1.10/0.01, addr 2
uhub2: 3 ports with 2 removable, bus powered
ukbd0: NMB Dell USB 7HK Keyboard, rev 1.10/0.01, addr 3, iclass 3/1
kbd0 at ukbd0
uhid0: NMB Dell USB 7HK Keyboard, rev 1.10/0.01, addr 3, iclass 3/1
Timecounters tick every 1.000 msec
acd0: CDROM <TOSHIBA CD-ROM XM-6002B/0527> at ata1-master PIO3
ad6: 70911MB <WDC WD740GD-50FLA1 27.08D27> at ata3-master SATA150
SMP: AP CPU #1 Launched!
Trying to mount root from ufs:/dev/ad6s1a

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