limits of maxproc on SUN E450 with FreeBSD 5.3 Beta7

From: Borghesi Guilhem (borghesi_at_dpt-info.u-strasbg.fr)
Date: 10/15/04

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    Date: Fri, 15 Oct 2004 15:12:54 +0200
To: freebsd-current@freebsd.org, freebsd-sparc64@freebsd.org

    Hello,

    I've installed a FreeBSD 5.3 Beta7 on a Sun sparc64 Enterprise 450.
    This machine is a Terminal and application server for University
    students. They are using this server for system programming (C for
    example) and they often use the command "fork ()" into "while" loops.

    The C program that we use for the test is :

    #include <stdio.h>
    #include <sys/types.h>
    #include <unistd.h>

    int main()
    {
        int i;

        while(1)
        {
           if(!fork())
           {
              i=i+1;
              fprintf(stderr,"%d\n", i);
           }
        }
    }

    This kind of bad programming is quite frequent at the university, and
    that's the reason why I'm trying to limit the number of maxproc per
    user. I've limited the maxproc with the /etc/login.conf file at 100 and
    make a "cap_mkdb /etc/login.conf", but it doesn't work. Worst, when the
    number of processes reach the limit, the server crash with the console
    message :"panic: trap: data access error".

    I've tried to put "unlimited" in place of "100", but it does'nt change
    anything because the system has an implicit limit for users
    (kern.maxprocperuid: 5547).

    In the /var/log/messages, the last line before crash is :
    "kernel: maxproc limit exceeded by uid 10051, please see tuning(7) and
    login.conf(5)."

    Thank's a lot for any help !

    Guilhem

    Here are my dmesg and login.conf files :

    dmesg :
    ===================================
    Copstray vector interrupt 2029
    yright (c) 1992-2004 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 5.3-BETA7 #3: Wed Oct 13 20:24:13 CEST 2004
         toor@ada.u-strasbg.fr:/usr/obj/usr/src/sys/GENERIC
    real memory = 4294967296 (4096 MB)
    avail memory = 4177952768 (3984 MB)
    cpu0: Sun Microsystems UltraSparc-II Processor (480.00 MHz CPU)
    cpu1: Sun Microsystems UltraSparc-II Processor (480.00 MHz CPU)
    cpu2: Sun Microsystems UltraSparc-II Processor (480.00 MHz CPU)
    cpu3: Sun Microsystems UltraSparc-II Processor (480.00 MHz CPU)
    FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
    nexus0: <Open Firmware Nexus device>
    nexus0: <associations>, type (unknown) (no driver attached)
    pcib0: <U2P UPA-PCI bridge> on nexus0
    pcib0: Psycho, impl 0, version 4, ign 0x7c0, bus B
    pcib0: [FAST]
    pcib0: [GIANT-LOCKED]
    pcib0: [FAST]
    pcib0: [GIANT-LOCKED]
    pcib0: [FAST]
    initializing counter-timer
    Timecounter "counter-timer" frequency 1000000 Hz quality 100
    pcib0 dvma: DVMA map: 0xfc000000 to 0xffffffff
    pci0: <OFW PCI bus> on pcib0
    ebus0: <PCI-EBus2 bridge> mem
    0x71000000-0x717fffff,0x70000000-0x70ffffff at device 1.0 on pci0
    ebus0: <auxio> addr
    0x140072f000-0x140072f003,0x140072c000-0x140072c003,0x140072a000-0x140072a003,0x1400728000-0x1400728003,0x1400726000-0x1400726003

    (no driver attached)
    ebus0: <power> addr 0x1400724000-0x1400724003 irq 2034,2021 (no driver
    attached)
    ebus0: <SUNW,pll> addr 0x1400504000-0x1400504002 (no driver attached)
    ebus0: <sc> addr 0x1400500000-0x1400500007 (no driver attached)
    sab0: <Siemens SAB 82532 v3.2> addr 0x1400400000-0x140040007f irq 43 on
    ebus0
    sab0: [FAST]
    sabtty0: <ttya> on sab0
    sabtty1: <ttyb> on sab0
    ebus0: <su> addr 0x14003083f8-0x14003083ff irq 41 (no driver attached)
    ebus0: <su> addr 0x14003062f8-0x14003062ff irq 42 (no driver attached)
    ebus0: <ecpp> addr
    0x1400700000-0x140070000f,0x1400300398-0x1400300399,0x14003043bc-0x14003043cb

    irq 2018 (no driver attached)
    ebus0: <fdthree> addr
    0x1400720000-0x1400720003,0x1400706000-0x140070600f,0x14003023f0-0x14003023f7

    irq 2023 (no driver attached)
    eeprom0: <EEPROM/clock> addr 0x1400000000-0x1400001fff on ebus0
    eeprom0: model mk48t59
    eeprom0: hostid 80fee436
    ebus0: <flashprom> addr
    0x1000000000-0x10000fffff,0x1000000000-0x10000fffff (no driver attached)
    ebus0: <SUNW,envctrl> addr 0x1400600000-0x1400600003 irq 2021,2024 (no
    driver attached)
    hme0: <Sun HME 10/100 Ethernet> mem 0x8000-0xffff at device 1.1 on pci0
    miibus0: <MII bus> on hme0
    nsphy0: <DP83840 10/100 media interface> on miibus0
    nsphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
    hme0: Ethernet address: 08:00:20:fe:e4:36
    hme0: if_start running deferred for Giant
    hme0: [GIANT-LOCKED]
    sym0: <875> port 0x400-0x4ff mem 0x12000-0x12fff,0x10000-0x100ff at
    device 3.0 on pci0
    sym0: No NVRAM, ID 7, Fast-20, SE, parity checking
    sym0: [GIANT-LOCKED]
    sym1: <875> port 0x800-0x8ff mem 0x16000-0x16fff,0x14000-0x140ff at
    device 2.0 on pci0
    sym1: No NVRAM, ID 7, Fast-20, SE, parity checking
    sym1: [GIANT-LOCKED]
    pci0: <display> at device 4.0 (no driver attached)
    pcib1: <U2P UPA-PCI bridge> on nexus0
    pcib1: Psycho, impl 0, version 4, ign 0x7c0, bus A
    pci1: <OFW PCI bus> on pcib1
    nexus0: <mc>, type memory-controller (no driver attached)
    pcib2: <U2P UPA-PCI bridge> on nexus0
    pcib2: Psycho, impl 0, version 4, ign 0x100, bus B
    pcib2: [FAST]
    pcib2: [GIANT-LOCKED]
    pcib2: [FAST]
    pcib2: [GIANT-LOCKED]
    pcib2: [FAST]
    initializing counter-timer
    Timecounter "counter-timer" frequency 1000000 Hz quality 100
    pcib2 dvma: DVMA map: 0xfc000000 to 0xffffffff
    pci2: <OFW PCI bus> on pcib2
    pcib3: <U2P UPA-PCI bridge> on nexus0
    pcib3: Psycho, impl 0, version 4, ign 0x100, bus A
    pci3: <OFW PCI bus> on pcib3
    pcib4: <U2P UPA-PCI bridge> on nexus0
    pcib4: Psycho, impl 0, version 4, ign 0x180, bus B
    pcib4: [FAST]
    pcib4: [GIANT-LOCKED]
    pcib4: [FAST]
    pcib4: [GIANT-LOCKED]
    pcib4: [FAST]
    initializing counter-timer
    Timecounter "counter-timer" frequency 1000000 Hz quality 100
    pcib4 dvma: DVMA map: 0xfc000000 to 0xffffffff
    pci4: <OFW PCI bus> on pcib4
    pcib5: <U2P UPA-PCI bridge> on nexus0
    pcib5: Psycho, impl 0, version 4, ign 0x180, bus A
    pci5: <OFW PCI bus> on pcib5
    Timecounters tick every 10.000 msec
    Waiting 15 seconds for SCSI devices to settle
    da0 at sym0 bus 0 target 0 lun 0
    da0: <FUJITSU MAJ3364M SUN36G 0804> Fixed Direct Access SCSI-2 device
    da0: 40.000MB/s transfers (20.000MHz, offset 16, 16bit), Tagged Queueing
    Enabled
    da0: 34732MB (71132959 512 byte sectors: 255H 63S/T 4427C)
    da2 at sym0 bus 0 target 3 lun 0
    da2: <FUJITSU MAJ3364M SUN36G 5804> Fixed Direct Access SCSI-2 device
    da2: 40.000MB/s transfers (20.000MHz, offset 16, 16bit), Tagged Queueing
    Enabled
    da2: 34732MB (71132959 512 byte sectors: 255H 63S/T 4427C)
    da1 at sym0 bus 0 target 1 lun 0
    da1: <SEAGATE ST336704LSUN36G 0326> Fixed Direct Access SCSI-3 device
    da1: 40.000MB/s transfers (20.000MHz, offset 16, 16bit), Tagged Queueing
    Enabled
    da1: 34732MB (71132959 512 byte sectors: 255H 63S/T 4427C)
    SMP: AP CPU #3 Launched!
    SMP: AP CPU #2 Launched!
    SMP: AP CPU #1 Launched!
    cd0 at sym1 bus 0 target 6 lun 0
    cd0: <TOSHIBA DVD-ROM SD-M1401 1007> Removable CD-ROM SCSI-2 device
    cd0: 20.000MB/s transfers (20.000MHz, offset 16)
    cd0: Attempt to query device size failed: NOT READY, Medium not present
    Mounting root from ufs:/dev/da0a
    WARNING: / was not properly dismounted
    WARNING: /usr was not properly dismounted
    /usr: superblock summary recomputed
    WARNING: /var was not properly dismounted
    WARNING: /users was not properly dismounted
    /users: superblock summary recomputed
    hme0: invalid packet size 9929; dropping
    hme0: invalid packet size 9929; dropping
    hme0: invalid packet size 9929; dropping
    hme0: invalid packet size 6348; dropping
    hme0: invalid packet size 9929; dropping
    hme0: too may errors; not reporting any more
    pid 1486 (TCPs), uid 2048: exited on signal 11 (core dumped)
    pid 1490 (TCPs), uid 2048: exited on signal 11 (core dumped)
    pid 1772 (TCPs), uid 2048: exited on signal 11 (core dumped)
    pid 2354 (TCPs), uid 2048: exited on signal 11 (core dumped)
    pid 2657 (upile), uid 4071: exited on signal 11 (core dumped)
    pid 2978 (TCPs), uid 2048: exited on signal 11 (core dumped)
    pid 3110 (TCPs), uid 2048: exited on signal 11 (core dumped)
    pid 3122 (TCPs), uid 2048: exited on signal 11 (core dumped)

    ===================================

    login.conf:
    ===================================
      # login.conf - login class capabilities database.
    #
    # Remember to rebuild the database after each change to this file:
    #
    # cap_mkdb /etc/login.conf
    #
    # This file controls resource limits, accounting limits and
    # default user environment settings.
    #
    # $FreeBSD: src/etc/login.conf,v 1.49 2004/06/06 11:46:27 schweikh Exp $
    #

    # Default settings effectively disable resource limits, see the
    # examples below for a starting point to enable them.

    # defaults
    # These settings are used by login(1) by default for classless users
    # Note that entries like "cputime" set both "cputime-cur" and "cputime-max"

    default:\
             :passwd_format=md5:\
             :copyright=/etc/COPYRIGHT:\
             :welcome=/etc/motd:\
             :setenv=MAIL=/var/mail/$,BLOCKSIZE=K,FTP_PASSIVE_MODE=YES:\
             :path=/sbin /bin /usr/sbin /usr/bin /usr/games /usr/local/sbin
    /usr/local/bin /usr/X11R6/bin ~/bin:\
             :nologin=/var/run/nologin:\
             :cputime=unlimited:\
             :datasize=unlimited:\
             :stacksize=unlimited:\
             :memorylocked=unlimited:\
             :memoryuse=unlimited:\
             :filesize=unlimited:\
             :coredumpsize=unlimited:\
             :openfiles=unlimited:\
             :maxproc=unlimited:\
             :sbsize=unlimited:\
             :vmemoryuse=unlimited:\
             :priority=0:\
             :ignoretime@:\
             :umask=022:

    #
    # A collection of common class names - forward them all to 'default'
    # (login would normally do this anyway, but having a class name
    # here suppresses the diagnostic)
    #
    standard:\
             :tc=default:
    xuser:\
             :tc=default:
    staff:\
             :tc=default:
    daemon:\
             :tc=default:
    news:\
             :tc=default:
    dialer:\
             :tc=default:

    #
    # Root can always login
    #
    # N.B. login_getpwclass(3) will use this entry for the root account,
    # in preference to 'default'.
    root:\
             :ignorenologin:\
             :tc=default:

    #
    # Russian Users Accounts. Setup proper environment variables.
    #
    russian|Russian Users Accounts:\
             :charset=KOI8-R:\
             :lang=ru_RU.KOI8-R:\
             :tc=default:

    ######################################################################
    ######################################################################
    ##
    ## Example entries
    ##
    ######################################################################
    ######################################################################

    ## Example defaults
    ## These settings are used by login(1) by default for classless users
    ## Note that entries like "cputime" set both "cputime-cur" and "cputime-max"
    #
    #default:\
    # :cputime=infinity:\
    # :datasize-cur=22M:\
    # :stacksize-cur=8M:\
    # :memorylocked-cur=10M:\
    # :memoryuse-cur=30M:\
    # :filesize=infinity:\
    # :coredumpsize=infinity:\
    # :maxproc-cur=64:\
    # :openfiles-cur=64:\
    # :priority=0:\
    # :requirehome@:\
    # :umask=022:\
    # :tc=auth-defaults:
    #
    #
    ##
    ## standard - standard user defaults
    ##
    #standard:\
    # :copyright=/etc/COPYRIGHT:\
    # :welcome=/etc/motd:\
    # :setenv=MAIL=/var/mail/$,BLOCKSIZE=K:\
    # :path=~/bin /bin /usr/bin /usr/local/bin:\
    # :manpath=/usr/share/man /usr/local/man:\
    # :nologin=/var/run/nologin:\
    # :cputime=1h30m:\
    # :datasize=8M:\
    # :vmemoryuse=100M:\
    # :stacksize=2M:\
    # :memorylocked=4M:\
    # :memoryuse=8M:\
    # :filesize=8M:\
    # :coredumpsize=8M:\
    # :openfiles=24:\
    # :maxproc=32:\
    # :priority=0:\
    # :requirehome:\
    # :passwordtime=90d:\
    # :umask=002:\
    # :ignoretime@:\
    # :tc=default:
    #
    #
    ##
    ## users of X (needs more resources!)
    ##
    #xuser:\
    # :manpath=/usr/share/man /usr/X11R6/man /usr/local/man:\
    # :cputime=4h:\
    # :datasize=12M:\
    # :vmemoryuse=infinity:\
    # :stacksize=4M:\
    # :filesize=8M:\
    # :memoryuse=16M:\
    # :openfiles=32:\
    # :maxproc=48:\
    # :tc=standard:
    #
    #
    ##
    ## Staff users - few restrictions and allow login anytime
    ##
    #staff:\
    # :ignorenologin:\
    # :ignoretime:\
    # :requirehome@:\
    # :accounted@:\
    # :path=~/bin /bin /sbin /usr/bin /usr/sbin /usr/local/bin
    /usr/local/sbin:\
    # :umask=022:\
    # :tc=standard:
    #
    #
    ##
    ## root - fallback for root logins
    ##
    #root:\
    # :path=~/bin /bin /sbin /usr/bin /usr/sbin /usr/local/bin
    /usr/local/sbin:\
    # :cputime=infinity:\
    # :datasize=infinity:\
    # :stacksize=infinity:\
    # :memorylocked=infinity:\
    # :memoryuse=infinity:\
    # :filesize=infinity:\
    # :coredumpsize=infinity:\
    # :openfiles=infinity:\
    # :maxproc=infinity:\
    # :memoryuse-cur=32M:\
    # :maxproc-cur=64:\
    # :openfiles-cur=1024:\
    # :priority=0:\
    # :requirehome@:\
    # :umask=022:\
    # :tc=auth-root-defaults:
    #
    #
    ##
    ## Settings used by /etc/rc
    ##
    #daemon:\
    # :coredumpsize@:\
    # :coredumpsize-cur=0:\
    # :datasize=infinity:\
    # :datasize-cur@:\
    # :maxproc=512:\
    # :maxproc-cur@:\
    # :memoryuse-cur=64M:\
    # :memorylocked-cur=64M:\
    # :openfiles=1024:\
    # :openfiles-cur@:\
    # :stacksize=16M:\
    # :stacksize-cur@:\
    # :tc=default:
    #
    #
    ##
    ## Settings used by news subsystem
    ##
    #news:\
    # :path=/usr/local/news/bin /bin /sbin /usr/bin /usr/sbin
    /usr/local/bin /usr/local/sbin:\
    # :cputime=infinity:\
    # :filesize=128M:\
    # :datasize-cur=64M:\
    # :stacksize-cur=32M:\
    # :coredumpsize-cur=0:\
    # :maxmemorysize-cur=128M:\
    # :memorylocked=32M:\
    # :maxproc=128:\
    # :openfiles=256:\
    # :tc=default:
    #
    #
    ##
    ## The dialer class should be used for a dialup PPP/SLIP accounts
    ## Welcome messages/news suppressed
    ##
    #dialer:\
    # :hushlogin:\
    # :requirehome@:\
    # :cputime=unlimited:\
    # :filesize=2M:\
    # :datasize=2M:\
    # :stacksize=4M:\
    # :coredumpsize=0:\
    # :memoryuse=4M:\
    # :memorylocked=1M:\
    # :maxproc=16:\
    # :openfiles=32:\
    # :tc=standard:
    #
    #
    ##
    ## Site full-time 24/7 PPP/SLIP connections
    ## - no time accounting, restricted to access via dialin lines
    ##
    #site:\
    # :ignoretime:\
    # :passwordtime@:\
    # :refreshtime@:\
    # :refreshperiod@:\
    # :sessionlimit@:\
    # :autodelete@:\
    # :expireperiod@:\
    # :graceexpire@:\
    # :gracetime@:\
    # :warnexpire@:\
    # :warnpassword@:\
    # :idletime@:\
    # :sessiontime@:\
    # :daytime@:\
    # :weektime@:\
    # :monthtime@:\
    # :warntime@:\
    # :accounted@:\
    # :tc=dialer:\
    # :tc=staff:
    #
    #
    ##
    ## Example standard accounting entries for subscriber levels
    ##
    #
    #subscriber|Subscribers:\
    # :accounted:\
    # :refreshtime=180d:\
    # :refreshperiod@:\
    # :sessionlimit@:\
    # :autodelete=30d:\
    # :expireperiod=180d:\
    # :graceexpire=7d:\
    # :gracetime=10m:\
    # :warnexpire=7d:\
    # :warnpassword=7d:\
    # :idletime=30m:\
    # :sessiontime=4h:\
    # :daytime=6h:\
    # :weektime=40h:\
    # :monthtime=120h:\
    # :warntime=4h:\
    # :tc=standard:
    #
    #
    ##
    ## Subscriber accounts. These accounts have their login times
    ## accounted and have access limits applied.
    ##
    #subppp|PPP Subscriber Accounts:\
    # :tc=dialer:\
    # :tc=subscriber:
    #
    #
    #subslip|SLIP Subscriber Accounts:\
    # :tc=dialer:\
    # :tc=subscriber:
    #
    #
    #subshell|Shell Subscriber Accounts:\
    # :tc=subscriber:
    #
    ##
    ## If you want some of the accounts to use traditional UNIX DES based
    ## password hashes.
    ##
    #des_users:\
    # :passwd_format=des:\
    # :tc=default:

    =================================== 

    -- 
Guilhem BORGHESI		 Tel : 03 90 24 02 09
Departement d'Informatique	 Fax : 03 90 24 03 29
Universite Louis Pasteur
7, rue Rene Descartes 67084 Strasbourg Cedex - FRANCE
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