NetBSD Problem Report #35580

From riz@boogers.sf.ca.us  Fri Feb  9 23:16:09 2007
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Date: Fri,  9 Feb 2007 15:15:14 -0800 (PST)
From: riz@boogers.sf.ca.us
Reply-To: riz@boogers.sf.ca.us
To: gnats-bugs@NetBSD.org
Subject: creating directories on large UFS2 -> boom
X-Send-Pr-Version: 3.95

>Number:         35580
>Category:       kern
>Synopsis:       creating directories on large UFS2 -> boom
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Feb 09 23:20:00 +0000 2007
>Last-Modified:  Fri Mar 02 21:00:04 +0000 2007
>Originator:     Jeff Rizzo
>Release:        NetBSD 4.0_BETA2
>Organization:

>Environment:


System: NetBSD boogers.sf.ca.us 3.0_STABLE NetBSD 3.0_STABLE (TYAN251X-XEN0) #1: Sat Jun 10 21:12:29 PDT 2006 riz@coconut.tastylime.net:/space/releng/buildobj3/sys/arch/i386/compile/TYAN251X-XEN0 i386
Architecture: i386
Machine: i386
>Description:
	Using a large (8.1T) filesystem on a twa(4) controller, UFS2
	format with 32k/4k block/fragsize crashes after creating
	a number of directories, thus:

uvm_fault(0xc0a26ae0, 0xc5f74000, 1) -> 0xe
kernel: supervisor trap page fault, code=0
Stopped in pid 484.1 (cp) at    netbsd:ffs_alloccg+0x2d:        movl    0x4(%eax
,%ecx,1),%ecx
db{0}> bt
ffs_alloccg(d2e6215c,ffffd444,812a1418,ffffffff,1000) at netbsd:ffs_alloccg+0x2d

ffs_hashalloc(812a1418,ffffffff,1000,c03b1e30,0) at netbsd:ffs_hashalloc+0x3d
ffs_alloc(d2e6215c,0,0,812a1418,ffffffff) at netbsd:ffs_alloc+0x1f9
ffs_balloc(d2e610f4,0,0,200,d03710fc) at netbsd:ffs_balloc+0xaf0
ufs_mkdir(d2055b18,c0931958,3c2,c04cde05,d2055b20) at netbsd:ufs_mkdir+0x34f
VOP_MKDIR(d202f2d4,d2055bd4,d2055be8,d2055b54,d02f1360) at netbsd:VOP_MKDIR+0x31

sys_mkdir(d02f1360,d2055c48,d2055c68,bbb9c944,bbb9c000) at netbsd:sys_mkdir+0x19
5
syscall_plain() at netbsd:syscall_plain+0x1a8
--- syscall (number 136) ---
0xbbbba0e3:
db{0}> 

>How-To-Repeat:
	The machine under test is a quad-core Xeon, with a SuperMicro
	X7DBE-X motherboard - Intel 5000 chipset.  There is a
	3ware 9550SX RAID controller - twa(4) driver.  The
	tested disk is a raid5 with 13 750G Seagate disks:

twa0: AMCC    9550SXU-16 DISK 3.043QD09ML0C8B8B4000FC8
ld1 at twa0 unit 1
ld1: 8381 GB, 1094171 cyl, 255 head, 63 sec, 512 bytes/sect x 17577861120 sectors

	There are a number of hurdles to overcome to get started: I
	used stock NetBSD 4.0_BETA2, with the exception of revision
	1.43 of sys/dev/ld.c, which is needed in order to use gpt(8)
	to add a GPT to the big disk.  (kernel config and dmesg
	are at the end of this PR)  Here's a log (slightly edited
	for readability) of what I did:

# gpt create -f /dev/rld1d
# gpt add  /dev/rld1d
Partition added, use:
        dkctl rld1d addwedge dk<N> 34 17577861053 <type>
to create a wedge for it
# dkctl /dev/rld1d addwedge dk0 34 17577861053 ffs
# dkctl /dev/rld1d listwedges
/dev/rld1d: 1 wedge:
dk0: dk0, 17577861053 blocks at 34, type: ffs
# newfs -O2 -b 32768 -f 4096 /dev/rdk0
/dev/rdk0: 8582940.0MB (17577861048 sectors) block size 32768, fragment size 4096
        using 11561 cylinder groups of 742.41MB, 23757 blks, 46848 inodes.
super-block backups (for fsck_ffs -b #) at:
192, 1520640, 3041088, 4561536, 6081984, 7602432, 9122880, 10643328, 12163776,
...............................................................................
# mount /dev/dk0 /mnt
# mkdir /mnt/foo
# cp /netbsd /mnt/foo
# md5 /netbsd
MD5 (/netbsd) = 97b3bdd37eb14cb0b3ff29d47e30054a
# md5 /mnt/foo/netbsd
MD5 (/mnt/foo/netbsd) = 97b3bdd37eb14cb0b3ff29d47e30054a
# cd /mnt/foo
# cp netbsd netbsd1
# cp netbsd netbsd2
# cp netbsd netbsd3
# cp netbsd netbsd4
# cp netbsd netbsd5
# cp netbsd netbsd6
# cp netbsd netbsd7
# cp netbsd netbsd8
# cp netbsd netbsd9
# cp netbsd netbsd10
# cd /mnt
# for i in `jot 1000 1 1000`                                                    do
> cp -rp foo foo{$i}
> done



... this chugs for a while, then the crash (above) is seen on the console.
I originally did this with much larger files, and on amd64 - it seems clear
that the directory creation is the problem, given the backtrace.

Kernel config is basically GENERIC.MPACPI, plus DIAGNOSTIC, DEBUG, LOCKDEBUG,
and pseudo-device drvctl


dmesg:

Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
    The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of the University of California.  All rights reserved.

NetBSD 4.0_BETA2 (COLOSSUS) #1: Thu Feb  8 22:17:21 PST 2007
        riz@colossus.corp.revision3.com:/usr/src/sys/arch/i386/compile/COLOSSUS
total memory = 3326 MB
avail memory = 3238 MB
timecounter: Timecounters tick every 10.000 msec
timecounter: Timecounter "i8254" frequency 1193182 Hz quality 100
BIOS32 rev. 0 found at 0xfd4c0
mainbus0 (root)
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel Core 2 (Merom) (686-class), 2000.10 MHz, id 0x6f6
cpu0: features bfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR>
cpu0: features bfebfbff<PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX>
cpu0: features bfebfbff<FXSR,SSE,SSE2,SS,HTT,TM,SBF>
cpu0: features2 4e33d<SSE3,MONITOR,DS-CPL,VMX,TM2,xTPR>
cpu0: "Intel(R) Xeon(R) CPU            5130  @ 2.00GHz"
cpu0: I-cache 32 KB 64B/line 8-way, D-cache 32 KB 64B/line 8-way
cpu0: L2 cache 4 MB 64B/line 16-way
cpu0: using thermal monitor 1
cpu0: calibrating local timer
cpu0: apic clock running at 333 MHz
cpu0: 64 page colors
cpu1 at mainbus0: apid 6 (application processor)
cpu1: starting
cpu1: Intel Core 2 (Merom) (686-class), 2000.01 MHz, id 0x6f6
cpu1: features bfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR>
cpu1: features bfebfbff<PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX>
cpu1: features bfebfbff<FXSR,SSE,SSE2,SS,HTT,TM,SBF>
cpu1: features2 4e33d<SSE3,MONITOR,DS-CPL,VMX,TM2,xTPR>
cpu1: "Intel(R) Xeon(R) CPU            5130  @ 2.00GHz"
cpu1: I-cache 32 KB 64B/line 8-way, D-cache 32 KB 64B/line 8-way
cpu1: L2 cache 4 MB 64B/line 16-way
cpu1: using thermal monitor 1
cpu2 at mainbus0: apid 1 (application processor)
cpu2: starting
cpu2: Intel Core 2 (Merom) (686-class), 2000.00 MHz, id 0x6f6
cpu2: features bfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR>
cpu2: features bfebfbff<PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX>
cpu2: features bfebfbff<FXSR,SSE,SSE2,SS,HTT,TM,SBF>
cpu2: features2 4e33d<SSE3,MONITOR,DS-CPL,VMX,TM2,xTPR>
cpu2: "Intel(R) Xeon(R) CPU            5130  @ 2.00GHz"
cpu2: I-cache 32 KB 64B/line 8-way, D-cache 32 KB 64B/line 8-way
cpu2: L2 cache 4 MB 64B/line 16-way
cpu2: using thermal monitor 1
cpu3 at mainbus0: apid 7 (application processor)
cpu3: starting
cpu3: Intel Core 2 (Merom) (686-class), 2000.01 MHz, id 0x6f6
cpu3: features bfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR>
cpu3: features bfebfbff<PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX>
cpu3: features bfebfbff<FXSR,SSE,SSE2,SS,HTT,TM,SBF>
cpu3: features2 4e33d<SSE3,MONITOR,DS-CPL,VMX,TM2,xTPR>
cpu3: "Intel(R) Xeon(R) CPU            5130  @ 2.00GHz"
cpu3: I-cache 32 KB 64B/line 8-way, D-cache 32 KB 64B/line 8-way
cpu3: L2 cache 4 MB 64B/line 16-way
cpu3: using thermal monitor 1
ioapic0 at mainbus0 apid 2 (I/O APIC)
ioapic0: pa 0xfec00000, version 20, 24 pins
ioapic1 at mainbus0 apid 3 (I/O APIC)
ioapic1: pa 0xfec80000, version 20, 24 pins
acpi0 at mainbus0: Advanced Configuration and Power Interface
acpi0: using Intel ACPI CA subsystem version 20060217
acpi0: X/RSDT: OemId <PTLTD ,  RSDT  ,06040000>, AslId < LTP,00000000>
acpi0: SCI interrupting at int 9
acpi0: fixed-feature power button present
timecounter: Timecounter "ACPI-Fast" frequency 3579545 Hz quality 1000
ACPI-Fast 24-bit timer
ACPI Object Type 'Processor' (0x0c) at acpi0 not configured
ACPI Object Type 'Processor' (0x0c) at acpi0 not configured
ACPI Object Type 'Processor' (0x0c) at acpi0 not configured
ACPI Object Type 'Processor' (0x0c) at acpi0 not configured
ACPI Object Type 'Processor' (0x0c) at acpi0 not configured
ACPI Object Type 'Processor' (0x0c) at acpi0 not configured
ACPI Object Type 'Processor' (0x0c) at acpi0 not configured
ACPI Object Type 'Processor' (0x0c) at acpi0 not configured
PNP0A03 [PCI/PCI-X Host Bridge] at acpi0 not configured
PNP0C02 [Plug and Play motherboard register resources] at acpi0 not configured
PNP0200 [AT DMA Controller] at acpi0 not configured
npx0 at acpi0 (PNP0C04)
npx0: io 0xf0-0xfe irq 13
npx0: reported by CPUID; using exception 16
PNP0000 [AT Interrupt Controller] at acpi0 not configured
PNP0B00 [AT Real-Time Clock] at acpi0 not configured
pcppi1 at acpi0 (PNP0800)
pcppi1: io 0x61
pcppi1: children must have an explicit unit
midi0 at pcppi1: PC speaker (CPU-intensive output)
sysbeep0 at pcppi1
attimer1 at acpi0 (PNP0100): AT Timer
attimer1: io 0x40-0x43,0x50-0x53 irq 0
PNP0C0F [PCI interrupt link device] at acpi0 not configured
PNP0C0F [PCI interrupt link device] at acpi0 not configured
PNP0C0F [PCI interrupt link device] at acpi0 not configured
PNP0C0F [PCI interrupt link device] at acpi0 not configured
INT0800 [Intel FWH Random Number Generator] at acpi0 not configured
PNP0A05 [Generic Container Device] at acpi0 not configured
pckbc0 at acpi0 (PNP0303): kbd port
pckbc0: io 0x60,0x64 irq 1
pckbc1 at acpi0 (PNP0F13): aux port
pckbc1: irq 12
com0 at acpi0 (PNP0501-1)
com0: io 0x3f8-0x3ff irq 4
com0: ns16550a, working fifo
com0: console
com1 at acpi0 (PNP0501-2)
com1: io 0x2f8-0x2ff irq 3
com1: ns16550a, working fifo
acpibut0 at acpi0 (PNP0C0C): ACPI Power Button
pcppi1: attached to attimer1
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0 mux 1
pms0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pms0 mux 0
pci0 at mainbus0 bus 0: configuration mode 1
pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
pchb0 at pci0 dev 0 function 0
pchb0: Intel product 0x25d8 (rev. 0x93)
ppb0 at pci0 dev 2 function 0: Intel product 0x25f7 (rev. 0x93)
pci1 at ppb0 bus 1
pci1: i/o space, memory space enabled, rd/line, wr/inv ok
ppb1 at pci1 dev 0 function 0: Intel 63xxESB PCI Express Upstream Port (rev. 0x01)
pci2 at ppb1 bus 2
pci2: i/o space, memory space enabled, rd/line, wr/inv ok
ppb2 at pci2 dev 0 function 0: Intel 63xxESB PCI Express Downstream Port #1 (rev. 0x01)
pci3 at ppb2 bus 3
pci3: i/o space, memory space enabled, rd/line, wr/inv ok
ppb3 at pci2 dev 2 function 0: Intel 63xxESB PCI Express Downstream Port #3 (rev. 0x01)
pci4 at ppb3 bus 4
pci4: i/o space, memory space enabled, rd/line, wr/inv ok
wm0 at pci4 dev 0 function 0: i80003 dual 1000baseT Ethernet, rev. 1
wm0: interrupting at ioapic0 pin 18 (irq 11)
wm0: PCI-Express bus
wm0: 65536 word (16 address bits) SPI EEPROM
wm0: Ethernet address 00:30:48:78:f2:b4
ikphy0 at wm0 phy 1: i82563 10/100/1000 media interface, rev. 2
ikphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto
wm1 at pci4 dev 0 function 1: i80003 dual 1000baseT Ethernet, rev. 1
wm1: interrupting at ioapic0 pin 19 (irq 10)
wm1: PCI-Express bus
wm1: 65536 word (16 address bits) SPI EEPROM
wm1: Ethernet address 00:30:48:78:f2:b5
ikphy1 at wm1 phy 1: i82563 10/100/1000 media interface, rev. 2
ikphy1: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto
ppb4 at pci1 dev 0 function 3: Intel 63xxESB PCI Express to PCI-X Bridge (rev. 0x01)
pci5 at ppb4 bus 5
pci5: i/o space, memory space enabled, rd/line, wr/inv ok
ppb5 at pci0 dev 4 function 0: Intel product 0x25f8 (rev. 0x93)
pci6 at ppb5 bus 6
pci6: i/o space, memory space enabled, rd/line, wr/inv ok
ppb6 at pci6 dev 0 function 0: Intel 6700PXH PCI Express-to-PCI Bridge #0 (rev. 0x09)
pci7 at ppb6 bus 7
pci7: i/o space, memory space enabled, rd/line, wr/inv ok
ppb7 at pci6 dev 0 function 2: Intel 6700PXH PCI Express-to-PCI Bridge #1 (rev. 0x09)
pci8 at ppb7 bus 8
pci8: i/o space, memory space enabled, rd/line, wr/inv ok
3ware 9550SX series: (rev. 0x00)
twa0 at pci8 dev 1 function 0: 3ware Apache
twa0: interrupting at ioapic0 pin 16 (irq 7)
twa0: AEN 0x0053: INFO: Need to do a capacity test: 
twa0: 16 ports, Firmware FE9X 3.04.01.011, BIOS BE9X 3.04.00.002
twa0: Monitor BL9X 3.02.00.001, PCB Rev 032 , Achip 1.90    , Pchip 1.60    
twa0: port 0: ST3750640NS                              715404 MB
twa0: port 1: ST3750640NS                              715404 MB
twa0: port 2: ST3750640NS                              715404 MB
twa0: port 3: ST3750640NS                              715404 MB
twa0: port 4: ST3750640NS                              715404 MB
twa0: port 5: ST3750640NS                              715404 MB
twa0: port 6: ST3750640NS                              715404 MB
twa0: port 7: ST3750640NS                              715404 MB
twa0: port 8: ST3750640NS                              715404 MB
twa0: port 9: ST3750640NS                              715404 MB
twa0: port 10: ST3750640NS                              715404 MB
twa0: port 11: ST3750640NS                              715404 MB
twa0: port 12: ST3750640NS                              715404 MB
twa0: port 13: ST3750640NS                              715404 MB
twa0: port 14: ST3750640NS                              715404 MB
twa0: AMCC    9550SXU-16 DISK 3.043QD0EK1WC8B8B40016B4
ld0 at twa0 unit 0
ld0: 81919 MB, 10443 cyl, 255 head, 63 sec, 512 bytes/sect x 167772159 sectors
twa0: AMCC    9550SXU-16 DISK 3.043QD09ML0C8B8B4000FC8
ld1 at twa0 unit 1
ld1: 8381 GB, 1094171 cyl, 255 head, 63 sec, 512 bytes/sect x 17577861120 sectors
ppb8 at pci0 dev 6 function 0: Intel product 0x25f9 (rev. 0x93)
pci9 at ppb8 bus 9
pci9: i/o space, memory space enabled, rd/line, wr/inv ok
ppb9 at pci9 dev 0 function 0: Intel 6700PXH PCI Express-to-PCI Bridge #0 (rev. 0x09)
pci10 at ppb9 bus 10
pci10: i/o space, memory space enabled, rd/line, wr/inv ok
ppb10 at pci9 dev 0 function 2: Intel 6700PXH PCI Express-to-PCI Bridge #1 (rev. 0x09)
pci11 at ppb10 bus 11
pci11: i/o space, memory space enabled, rd/line, wr/inv ok
Intel product 0x1a38 (miscellaneous system, revision 0x93) at pci0 dev 8 function 0 not configured
pchb1 at pci0 dev 16 function 0
pchb1: Intel product 0x25f0 (rev. 0x93)
pchb2 at pci0 dev 16 function 1
pchb2: Intel product 0x25f0 (rev. 0x93)
pchb3 at pci0 dev 16 function 2
pchb3: Intel product 0x25f0 (rev. 0x93)
pchb4 at pci0 dev 17 function 0
pchb4: Intel product 0x25f1 (rev. 0x93)
pchb5 at pci0 dev 19 function 0
pchb5: Intel product 0x25f3 (rev. 0x93)
pchb6 at pci0 dev 21 function 0
pchb6: Intel product 0x25f5 (rev. 0x93)
pchb7 at pci0 dev 22 function 0
pchb7: Intel product 0x25f6 (rev. 0x93)
uhci0 at pci0 dev 29 function 0: Intel 63xxESB USB UHCI Controller (rev. 0x09)
uhci0: interrupting at ioapic0 pin 17 (irq 5)
usb0 at uhci0: USB revision 1.0
uhub0 at usb0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
uhci1 at pci0 dev 29 function 1: Intel 63xxESB USB UHCI Controller (rev. 0x09)
uhci1: interrupting at ioapic0 pin 19 (irq 10)
usb1 at uhci1: USB revision 1.0
uhub1 at usb1
uhub1: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
uhci2 at pci0 dev 29 function 2: Intel 63xxESB USB UHCI Controller (rev. 0x09)
uhci2: interrupting at ioapic0 pin 18 (irq 11)
usb2 at uhci2: USB revision 1.0
uhub2 at usb2
uhub2: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub2: 2 ports with 2 removable, self powered
ehci0 at pci0 dev 29 function 7: Intel 63xxESB USB EHCI Controller (rev. 0x09)
ehci0: interrupting at ioapic0 pin 17 (irq 5)
ehci0: BIOS has given up ownership
ehci0: EHCI version 1.0
ehci0: companion controllers, 2 ports each: uhci0 uhci1 uhci2
usb3 at ehci0: USB revision 2.0
uhub3 at usb3
uhub3: Intel EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
uhub3: 6 ports with 6 removable, self powered
ppb11 at pci0 dev 30 function 0: Intel 82801BA Hub-PCI Bridge (rev. 0xd9)
pci12 at ppb11 bus 12
pci12: i/o space, memory space enabled
vga0 at pci12 dev 1 function 0: ATI Technologies product 0x515e (rev. 0x02)
wsdisplay0 at vga0 kbdmux 1
wsmux1: connecting to wsdisplay0
pckbd_enable: command error
pcib0 at pci0 dev 31 function 0
pcib0: Intel 63xxESB LPC Interface Bridge (rev. 0x09)
piixide0 at pci0 dev 31 function 1
piixide0: Intel 631xESB/632xESB IDE Controller (rev. 0x09)
piixide0: bus-master DMA support present
piixide0: primary channel configured to compatibility mode
piixide0: primary channel interrupting at ioapic0 pin 14 (irq 14)
atabus0 at piixide0 channel 0
piixide0: secondary channel configured to compatibility mode
piixide0: secondary channel ignored (disabled)
Intel 63xxESB SMBus Controller (SMBus serial bus, revision 0x09) at pci0 dev 31 function 3 not configured
isa0 at pcib0
isapnp0 at isa0 port 0x279: ISA Plug 'n Play device support
isapnp0: no ISA Plug 'n Play devices found
ioapic0: enabling
ioapic1: enabling
timecounter: Timecounter "clockinterrupt" frequency 100 Hz quality 0
raidattach: Asked for 8 units
Kernelized RAIDframe activated
atapibus0 at atabus0: 2 targets
cd0 at atapibus0 drive 0: <SR244W, , T01A> cdrom removable
cd0: 32-bit data port
cd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 2 (Ultra/33)
cd0(piixide0:0:0): using PIO mode 4, DMA mode 2 (using DMA)
ehci0: handing over full speed device on port 3 to uhci1
uhub3: port 3, device disappeared after reset
Searching for RAID components...
ld1: mbr partition exceeds disk size
ld1: mbr partition exceeds disk size
ld1: mbr partition exceeds disk size
ld1: mbr partition exceeds disk size
boot device: ld0
root on ld0a dumps on ld0b
mountroot: trying lfs...
mountroot: trying ffs...
root file system type: ffs
cpu2: CPU 1 running
cpu1: CPU 6 running
cpu3: CPU 7 running
init: copying out path `/sbin/init' 11
uhub4 at uhub1 port 1
uhub4: Mitsumi Electric Hub in Apple Extended USB Keyboard, class 9/0, rev 1.10/4.20, addr 2
uhub4: 3 ports with 2 removable, bus powered
uhidev0 at uhub4 port 1 configuration 1 interface 0
uhidev0: Primax Electronics Apple Optical USB Mouse, rev 1.10/1.10, addr 3, iclass 3/1
ums0 at uhidev0: 4 buttons and Z dir.
wsmouse1 at ums0 mux 0
uhidev1 at uhub4 port 3 configuration 1 interface 0
uhidev1: Mitsumi Electric Apple Extended USB Keyboard, rev 1.10/4.20, addr 4, iclass 3/1
ukbd0 at uhidev1: 8 modifier keys, 6 key codes
wskbd1 at ukbd0 mux 1
wskbd1: connecting to wsdisplay0
uhidev2 at uhub4 port 3 configuration 1 interface 1
uhidev2: Mitsumi Electric Apple Extended USB Keyboard, rev 1.10/4.20, addr 4, iclass 3/0
uhidev2: 3 report ids
uhid0 at uhidev2 reportid 2: input=1, output=0, feature=0
uhid1 at uhidev2 reportid 3: input=3, output=0, feature=0
wsdisplay0: screen 1 added (80x25, vt100 emulation)
wsdisplay0: screen 2 added (80x25, vt100 emulation)
wsdisplay0: screen 3 added (80x25, vt100 emulation)
wsdisplay0: screen 4 added (80x25, vt100 emulation)




>Fix:
	none given

>Audit-Trail:
From: Jeff Rizzo <riz@NetBSD.org>
To: gnats-bugs@netbsd.org
Cc: 
Subject: Re: kern/35580
Date: Fri, 2 Mar 2007 11:53:41 -0800

 More investigation has suggested to me that this is a file system
 problem rather than a controller problem.

 Using the above test (creating 1000 directories - I think the files
 within the directories are irrelevant, though I haven't tested without
 them), I get a repeatable failure with a filesystem of 8T or above.
 I haven't narrowed much within the range, but creating progressively
 larger and smaller arrays with the twa(4) controller, using 750G drives,
 an 8.1T file system (13 drives in a raid5) exhibits the problem, while
 a 7.4T file system does not.  An 8.9T file system exhibits the problem.

 Also, taking the initial, problematic 8.1T array and putting two 4T file
 systems on it yields two _working_ file systems.

 It seems pretty clear to me that we have some sort of overflow issue
 going on.

>Unformatted:

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