Hello,
We have been observing the following on quite a few of our i386
FreeBSD 7.2 systems in the course of the last few months:
1. Boxes locking up - to clarify, manual reboot necessary to bring it
back into operation.
2. Boxes panicking somewhere in virtual memory code eg., vdrop, page_fault.
In both cases, did not find anything specifically unusual in their
usage profile, when compared with other similar machines. For example,
SWAPMETA was well within limits, available vm.kmem_map_free was quite
normal. One observation was that the re-start of a periodically
re-starting memory-intensive process coincided with the lockup/panic.
Suspecting that we did not have the fix for some kernel bug that was
perhaps fixed later, looked thru the known FreeBSD 7.2 issues that had
similar back-traces but did not find any. I know this is somewhat of
an old release but any history/pointers for known bugs or any other
suggestions would be most helpful.
Unfortunately, it is not quite an option to debug these boxes when
they hit the issue.
Data for config, selected sysctls and sample backtraces follow.
[1] Key-portions of config
machine i386
cpu I686_CPU
maxusers256
makeoptionsDEBUG=-g
options SCHED_4BSD
options PREEMPTION # Enable kernel thread preemption
options COMPAT_43 #Compatible with BSD 4.3 [KEEP THIS!]
options INET #InterNETworking
options INET6 #IPv6
options FFS #Berkeley Fast Filesystem
options SOFTUPDATES#Enable FFS soft updates support
options MD_ROOT#MD is a potential root device
options PROCFS #Process filesystem
options PSEUDOFS
options SCSI_DELAY=2000 #Delay (in ms) before probing SCSI
options UFS_DIRHASH
options VFS_AIO
options _KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time extensions
options SYSVSHM
options SYSVSEM
options SYSVMSG
options SHMMAXPGS=65536
options SEMMNI=40
options SEMMNS=240
options SEMUME=40
options SEMMNU=120
options SMP # Symmetric MultiProcessor Kernel
device apic# Symmetric (APIC) I/O
device pci
device ata
device atadisk # ATA disk drives
device atapicd # ATAPI CDROM drives
device ataraid # ATA RAID drives
options ATA_STATIC_ID #Static device numbering
device ahc# AHA2940 and onboard AIC7xxx devices
device scbus# SCSI bus (required)
device da # Direct Access (disks)
device pass #CAM passthrough driver
device aac # Adaptec FSA RAID, Dell PERC2/PERC3
device amr # AMI MegaRAID
device atkbdc
device atkbd
device vga
device sc
device sio
device miibus # MII bus support
device fxp # Intel EtherExpress PRO/100B (82557, 82558)
device bge # Broadcom BCM570x (``Tigon III'')
device bce
device em
device le
device loop# Network loopback
device ether # Ethernet support
device vlan# Virtual LAN support
device pty # Pseudo-ttys (telnet etc)
device md # Memory disks
device bpf #Berkeley packet filter
options KDB
options ALT_BREAK_TO_DEBUGGER # ~CR^B
options KDB_UNATTENDED # reboot on default
options DDB # reboot on default
options KDB_TRACE # traceback
options GDB
#HW Crypto
device crypto# core crypto support
device cryptodev # /dev/crypto for access to h/w
device ubsec# Broadcom 5501, 5601, 58xx
device hifn# Hifn 7951, 7781, etc.
device safe # SafeNet 1141
device smb # /dev/smb*
device smbus # bus
device ichsmb # Intel ICH SMBus controller chips
device acpi
device random
options COMPAT_FREEBSD4
options COMPAT_FREEBSD6
options COMPAT_LINUX
options LINPROCFS
options LINSYSFS
device ichwd
device mpt
device ed
# add in IPv6 support
options INET6 # IPv6 communications protocols
device gif # IPv6 and IPv4 tunneling
device faith # IPv6-to-IPv4 relaying (translation)
#buffer kernel logging so messages don't get split
options PRINTF_BUFR_SIZE=256
device sg # Linux SCSI passthrough
device mfip# LSI MegaRAID SAS passthrough, requires CAM
#Bump up kernel message buffer size to capture tty logs.
optionsMSGBUF_SIZE=98304
device ichgpio
# 2 fibs.
options ROUTETABLES=2
[2] Sample back-traces
page fault
db_trace_self_wrapper+38
kdb_backtrace+41
panic+615
trap_fatal+819
trap_pfault+592
trap+946
calltrap+6
vm_page_cache_remove+14
vm_page_alloc+789
vm_fault+2215
trap_pfault+315
trap+560
calltrap+6
sched_switch+406
mi_switch+326
