Re: panic: sorele

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Date: Thu, 30 Sep 2004 17:01:50 -0700
To: Vlad <marchenko@gmail.com>

Well, I only have squid in my machine and although I have 1 cpu. I am
using hyperthreading. So probably the problem is associated with SMP as
Vlad mentioned. I didnt try to compile kernel without SMP but I will try
it next time my proxy crash. I also do not want anymore crashes on my
production server.

I have lots of parts of the GENERIC kernel conf file commented out but
these are my additions to GENERIC kernel below.

Funny coincidence because I also mingled with process size things in my
box as Vlad did...Might be something about those?

My squid process is about 1500mbyte now so... I needed to increase the
maximum process size and I needed to adjust shared memory stuff because
of the requirements of diskd of squid.

By the way, what is the difference between
options MAXDSIZ="(2048UL*1024*1024)"
and
options MAXDSIZ="(850*1024*1024)"
I mean the UL part :)

Evren

#My Additions

# ACPI support
device acpi

# To include support for VESA video modes
options VESA

#Snoop device - to look at pty/vty/etc..
device snp

#binary compatibility
options COMPAT_AOUT

#firewall
options IPFIREWALL
#forward
options IPFIREWALL_FORWARD
#allow everything by default
options IPFIREWALL_DEFAULT_TO_ACCEPT

#set process memory usage limits
options MAXDSIZ="(2048UL*1024*1024)"
options MAXSSIZ="(2048UL*1024*1024)"
options DFLDSIZ="(2048UL*1024*1024)"

#squid diskd
options MSGMNB=8192 # max # of bytes in a queue
options MSGMNI=64 # number of message queue identifiers
options MSGSEG=512 # number of message segments per queue
options MSGSSZ=64 # size of a message segment
options MSGTQL=4096 # max messages in system

Vlad wrote:
> my config below, the only difference when it crashes is two lines
> with SMP and apic uncommented.
> server is a dual p3 on intel-STL2 motherboard, 1.5gig ram, adatec 2100 raid5
> it runs apache webserver with ad-serving application written on
> modperl. accepting several tens of http requests a second (usually
> it's a click or impression sort of requests, they are small request /
> rediredct responce).
> Postgresql database is running on the same server.
> postfix mail server
>
> that's all
>
> -----
> machine i386
> cpu I686_CPU
> ident DC1
>
> # To statically compile in device wiring instead of /boot/device.hints
> #hints "GENERIC.hints" # Default places to look for devices.
>
> options SCHED_4BSD # 4BSD scheduler
> #options SCHED_ULE
> options INET # InterNETworking
> options FFS # Berkeley Fast Filesystem
> options SOFTUPDATES # Enable FFS soft updates support
> #options UFS_ACL # Support for access control lists
> options UFS_DIRHASH # Improve performance on big directories
> options MD_ROOT # MD is a potential root device
> options MSDOSFS # MSDOS Filesystem
> options CD9660 # ISO 9660 Filesystem
> options PROCFS # Process filesystem (requires PSEUDOFS)
> options PSEUDOFS # Pseudo-filesystem framework
> options GEOM_GPT # GUID Partition Tables.
> options COMPAT_43 # Compatible with BSD 4.3 [KEEP THIS!]
> #options COMPAT_FREEBSD4 # Compatible with FreeBSD4
> options SCSI_DELAY=5000 # Delay (in ms) before probing SCSI
> options KTRACE # ktrace(1) support
> options SYSVSHM # SYSV-style shared memory
> options SYSVMSG # SYSV-style message queues
> options SYSVSEM # SYSV-style semaphores
> options _KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time extensions
> options KBD_INSTALL_CDEV # install a CDEV entry in /dev
> options AHC_REG_PRETTY_PRINT # Print register bitfields in debug
> # output. Adds ~128k to driver.
> options AHD_REG_PRETTY_PRINT # Print register bitfields in debug
> # output. Adds ~215k to driver.
> options ADAPTIVE_GIANT # Giant mutex is adaptive.
>
> # To make an SMP kernel, the next two are needed
> #options SMP # Symmetric MultiProcessor Kernel
> #device apic # I/O APIC
>
> #options DEBUG=-g
> #options INVARIANTS
> #options INVARIANT_SUPPORT
> #options DDB
> #options KDB
> #options KDB_UNATTENDED
> #options WITNESS
> #options WITNESS_KDB
> #options NET_WITH_GIANT
>
> # Bus support. Do not remove isa, even if you have no isa slots
> device isa
> device pci
>
> # Floppy drives
> device fdc
>
> # ATA and ATAPI devices
> device ata
> device atadisk # ATA disk drives
> device ataraid # ATA RAID drives
> device atapicd # ATAPI CDROM drives
> device atapifd # ATAPI floppy drives
> device atapist # ATAPI tape drives
> options ATA_STATIC_ID # Static device numbering
>
>
> # SCSI peripherals
> device scbus # SCSI bus (required for SCSI)
> device ch # SCSI media changers
> device da # Direct Access (disks)
> device sa # Sequential Access (tape etc)
> device cd # CD
> device pass # Passthrough device (direct SCSI access)
> device ses # SCSI Environmental Services (and SAF-TE)
>
> # RAID controllers interfaced to the SCSI subsystem
> device asr # DPT SmartRAID V, VI and Adaptec SCSI RAID
>
> # atkbdc0 controls both the keyboard and the PS/2 mouse
> device atkbdc # AT keyboard controller
> device atkbd # AT keyboard
> device psm # PS/2 mouse
>
> device vga # VGA video card driver
>
> device splash # Splash screen and screen saver support
>
> # syscons is the default console driver, resembling an SCO console
> device sc
>
> #device agp # support several AGP chipsets
>
> # Floating point support - do not disable.
> device npx
>
> # Power management support (see NOTES for more options)
> #device apm
> # Add suspend/resume support for the i8254.
> device pmtimer
>
> # Serial (COM) ports
> device sio # 8250, 16[45]50 based serial ports
>
> # If you've got a "dumb" serial or parallel PCI card that is
> # supported by the puc(4) glue driver, uncomment the following
> # line to enable it (connects to the sio and/or ppc drivers):
> #device puc
>
> # PCI Ethernet NICs that use the common MII bus controller code.
> # NOTE: Be sure to keep the 'device miibus' line in order to use these NICs!
> device miibus # MII bus support
> device fxp # Intel EtherExpress PRO/100B (82557, 82558)
>
> # Pseudo devices.
> device loop # Network loopback
> device mem # Memory and kernel memory devices
> device io # I/O device
> device random # Entropy device
> device ether # Ethernet support
> device sl # Kernel SLIP
> device ppp # Kernel PPP
> device tun # Packet tunnel.
> device pty # Pseudo-ttys (telnet etc)
> device md # Memory "disks"
>
> # The `bpf' device enables the Berkeley Packet Filter.
> # Be aware of the administrative consequences of enabling this!
> device bpf # Berkeley packet filter
>
> options IPFIREWALL
> options IPFIREWALL_VERBOSE
> options IPFIREWALL_DEFAULT_TO_ACCEPT
>
> options SHMMAXPGS=200000
> options SHMMNI=4096
> options SHMSEG=4096
> options SEMOPM=300
> options SEMMNI=250
> options SEMMAP=250
> options SEMMSL=300
> options SEMMNS=35000
> options SEMUME=40
> options SEMMNU=120
>
> options MAXDSIZ="(850*1024*1024)"
> options MAXSSIZ="(850*1024*1024)"
> options DFLDSIZ="(850*1024*1024)"
> #options PMAP_SHPGPERPROC=501
>
>
>>>it just crashed even with NET_WITH_GIANT option. I could not leave it
>>>waiting at DDB prompt so I've compiled it with GDB_UNATTENDED... so no
>>>new info :(
>>
>>Hmm. Interesting; in some ways reassuring, in some ways not.
>>
>>I'd like to get to reproducing this in our test environment. Could you
>>provide some information on application workload and how I could do that?
>
>
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