kern/96042: Kernel panics with sbdrop

Vladislav V. Prodan vlad11 at
Wed Apr 19 09:50:14 UTC 2006

>Number:         96042
>Category:       kern
>Synopsis:       Kernel panics with sbdrop
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Apr 19 09:50:13 GMT 2006
>Originator:     Vladislav V. Prodan
>Release:        FreeBSD 6.1-PRERELEASE
Odessa National Academy of Law
FreeBSD 6.1-PRERELEASE FreeBSD 6.1-PRERELEASE #0: Tue Apr 18 16:21:06 EEST 2006     vlad11 at  i386
I've encountered a strange problem while using FreeBSD 6.1-PRERELEASE for our file-server providing access via ftp and NFS.
The system crashes constantly with a kernel panic (panic: sbdrop).
Status netstat -m before crash:

337/473/810 mbufs in use (current/cache/total)
80/144/224/33792 mbuf clusters in use (current/cache/total/max)
244K/406K/650K bytes allocated to network (current/cache/total)
4009804/688682/688637 requests for mbufs denied
0/3/8704 sfbufs in use (current/peak/max)
0 requests for sfbufs denied
0 requests for sfbufs delayed
0 requests for I/O initiated by sendfile
131 calls to protocol drain routines

Also in the console appeared before panic messages: 
in_cksum_skip: out of data by 13260 
in_cksum_skip: out of data by 13260 
gig0: discard oversize frame (ether type 23c2 flags 3 len 1518> max 1514) 
gig0: discard oversize frame (ether type 23c2 flags 3 len 1518> max 1514)
sk0: watchdog timeout 

The kernel is a GENERIC kernel with changes for SMP and semaphores support.


maxusers        512

# System V semaphores and tunable parameters
options         SYSVSEM         # include support for semaphores
options         SEMMAP=31       # amount of entries in semaphore map
options         SEMMNI=11       # number of semaphore identifiers in the system
options         SEMMNS=61       # number of semaphores in the system
options         SEMMNU=31       # number of undo structures in the system
options         SEMMSL=61       # max number of semaphores per id
options         SEMOPM=101      # max number of operations per semop call
options         SEMUME=11       # max number of undo entries per process

# System V message queues and tunable parameters
options         SYSVMSG         # include support for message queues
options         MSGMNB=2049     # max characters per message queue
options         MSGMNI=41       # max number of message queue identifiers
options         MSGSEG=2049     # max number of message segments in the system
options         MSGSSZ=16       # size of a message segment MUST be power of 2
options         MSGTQL=41       # max amount of messages in the system

# System V shared memory and tunable parameters
options         SYSVSHM         # include support for shared memory
options         SHMMAXPGS=2048  # max amount of shared memory pages (4k on i386)
options         SHMALL=2048     # max number of shared memory pages system wide
options         SHMMAX="(SHMMAXPGS*PAGE_SIZE+1)"         # max shared memory segment size (b
options         SHMMIN=2        # min shared memory segment size (bytes)
options         SHMMNI=33       # max number of shared memory identifiers
options         SHMSEG=9        # max shared memory segments per process

options         SMP
#options         MUTEX_NOINLINE
options         MUTEX_WAKE_ALL
options         PREEMPTION
options         FULL_PREEMPTION
options         MUTEX_DEBUG
#options         WITNESS
#options         WITNESS_KDB
#options         WITNESS_SKIPSPIN

options         MUTEX_PROFILING

# Set the number of buffers and the hash size.  The hash size MUST be
# than the number of buffers.  Hash size should be prime.

options         MPROF_BUFFERS="1536"
options         MPROF_HASH_SIZE="1543"

# Profiling for internal hash tables.

# Mandatory:
device          apic                    # I/O apic

# Optional:
options         MPTABLE_FORCE_HTT       # Enable HTT CPUs with the MP Table
options         IPI_PREEMPTION

It is necessary to try three times downloading a file with ftp nearby 1 GB for the speed 3-10 MB/c. System it is guaranteed receives panic.

P.S. I can give shell access to this server.

 Copyright (c) 1992-2006 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 6.1-PRERELEASE #0: Tue Apr 18 16:21:06 EEST 2006
     vlad11 at
 Timecounter "i8254" frequency 1193182 Hz quality 0
 CPU: Intel Pentium III (996.55-MHz 686-class CPU)
   Origin = "GenuineIntel"  Id = 0x686  Stepping = 6
 real memory  = 536805376 (511 MB)
 avail memory = 515223552 (491 MB)
 FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
  cpu0 (BSP): APIC ID:  0
  cpu1 (AP): APIC ID:  1
 ioapic0 <Version 1.1> irqs 0-23 on motherboard
 npx0: [FAST]
 npx0: <math processor> on motherboard
 npx0: INT 16 interface
 acpi0: <AMIINT > on motherboard
 acpi0: Power Button (fixed)
 Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
 acpi_timer0: <24-bit timer at 3.579545MHz> port 0x808-0x80b on acpi0
 cpu0: <ACPI CPU> on acpi0
 cpu1: <ACPI CPU> on acpi0
 acpi_button0: <Power Button> on acpi0
 pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
 pci0: <ACPI PCI bus> on pcib0
 agp0: <VIA 82C691 (Apollo Pro) host to PCI bridge> mem 0xe0000000-0xe0ffffff at device 0.0 on pci0
 pcib1: <PCI-PCI bridge> at device 1.0 on pci0
 pci2: <PCI bus> on pcib1
 pci2: <display, VGA> at device 0.0 (no driver attached)
 isab0: <PCI-ISA bridge> at device 7.0 on pci0
 isa0: <ISA bus> on isab0
 atapci0: <VIA 82C686A UDMA66 controller> port 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xffa0-0xffaf at device 7.1 on pci0
 ata0: <ATA channel 0> on atapci0
 ata1: <ATA channel 1> on atapci0
 pci0: <serial bus, SMBus> at device 7.4 (no driver attached)
 pcib2: <PCI-PCI bridge> at device 10.0 on pci0
 pci1: <PCI bus> on pcib2
 asr0: <Adaptec Caching SCSI RAID> mem 0xd4000000-0xd5ffffff irq 18 at device 10.1 on pci0
 asr0: ADAPTEC 2100S FW Rev. 370F, 1 channel, 256 CCBs, Protocol I2O
 skc0: <SysKonnect Gigabit Ethernet (V2.0)> port 0xd800-0xd8ff mem 0xdfff8000-0xdfffbfff irq 16 at device 12.0 on pci0
 skc0: Marvell Yukon Lite Gigabit Ethernet rev. A3(0x7)
 sk0: <Marvell Semiconductor, Inc. Yukon> on skc0
 sk0: Ethernet address: 00:0c:46:46:7f:41
 miibus0: <MII bus> on sk0
 e1000phy0: <Marvell 88E1000 Gigabit PHY> on miibus0
 e1000phy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseTX-FDX, auto
 fxp0: <Intel 82550 Pro/100 Ethernet> port 0xdc00-0xdc3f mem 0xdffff000-0xdfffffff,0xdffc0000-0xdffdffff irq 17 at device 13.0 on pci0
 miibus1: <MII bus> on fxp0
 inphy0: <i82555 10/100 media interface> on miibus1
 inphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
 fxp0: Ethernet address: 00:02:b3:87:a2:5c
 acpi_button1: <Sleep Button> on acpi0
 acpi_tz0: <Thermal Zone> on acpi0
 atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0
 atkbd0: <AT Keyboard> irq 1 on atkbdc0
 kbd0 at atkbd0
 atkbd0: [GIANT-LOCKED]
 psm0: <PS/2 Mouse> irq 12 on atkbdc0
 psm0: model IntelliMouse, device ID 3
 fdc0: <floppy drive controller> port 0x3f2-0x3f5,0x3f7 irq 6 drq 2 on acpi0
 fdc0: [FAST]
 pmtimer0 on isa0
 orm0: <ISA Option ROMs> at iomem 0xc0000-0xc7fff,0xc8000-0xc97ff,0xc9800-0xcafff,0xcb000-0xd0fff 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
 ppc0: parallel port not found.
 sio0: configured irq 4 not in bitmap of probed irqs 0
 sio0: port may not be enabled
 sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
 sio0: type 8250 or not responding
 sio1: configured irq 3 not in bitmap of probed irqs 0
 sio1: port may not be enabled
 Timecounters tick every 1.000 msec
 IP Filter: v4.1.8 initialized.  Default = pass all, Logging = enabled
 ipfw2 (+ipv6) initialized, divert loadable, rule-based forwarding enabled, default to accept, logging limited to 100 packets/entry by default
 ad2: 305245MB <WDC WD3200JB-00KFA0 08.05J08> at ata1-master UDMA66
 ad3: 305245MB <WDC WD3200JB-00KFA0 08.05J08> at ata1-slave UDMA66
 da0 at asr0 bus 0 target 1 lun 0
 da0: <ADAPTEC RAID-5 370F> Fixed Direct Access SCSI-2 device
 da0: Tagged Queueing Enabled
 da0: 35002MB (71684096 512 byte sectors: 255H 63S/T 4462C)
 SMP: AP CPU #1 Launched!
 I tried to change network card Allied Telesyn AT-2916T (sk0) on Intel Pro/100 S (fxp0), but the problem has not disappeared...

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