[Panic] 6b3 + mdconfig -t malloc + unionfs + screeen

From: McLone (mclone_at_gmail.com)
Date: 09/04/05

  • Next message: Peter Jeremy: "Re: HZ option [Was: Re: custom kernel + if_xl + error]" 
    Date: Sun, 4 Sep 2005 22:18:07 +0300
To: freebsd-current@freebsd.org

    Hello.

    Today, when trying to make this crappy legacy nVidia driver to work,
    i managed to boot in single-user and i wanted screen(1) too.
    I was afraid kldload nvidia.ko will panic my box, so i was planning
    to do it while [most of] disks were mounted read-only.
    (Yes nvidia.ko v.7xxx paniced it finally)
    So i created following script, which _alone_ paniced my box.

    ...it loads snd_emu10k1 here... i really miss color beastie.
    OK boot -vs
    ...dmesg (verbose) goes here...
    ...enter path name or /bin/sh:
    # fsck -y
    # mount -at ufs -o ro
    # tcsh
    > cat /ramfs.sh
    #!/bin/sh
    swapon -a
    mount -uo rw /
    mkdir /mnt/ramfs 2>&- 1>&-
    mount -o ro -at ufs
    mount -ufo ro -at ufs # just to be sure
    umount /mnt/ramfs 2>&- 1>&-
    mdconfig -d -u 1
    mdconfig -a -t malloc -s 16m -u 1
    bsdlabel -w /dev/md1
    newfs -O 1 -m 0 /dev/md1a
    mount /dev/md1a /mnt/ramfs
    mount_unionfs /mnt/ramfs /var
    chmod 700 /tmp/screens/S-root
    > /ramfs.sh
    ...newfs output goes here, with GEOM messages...
    > pkg_info |grep screen
    screen-4.0.2_1 A multi-screen window manager
    > uname -a
    FreeBSD Droid.local 6.0-BETA3 FreeBSD 6.0-BETA3 #3: Sun Sep 0
    20:49:18 EEST 2005
    root@Droid.local:/usr/src/sys/i386/compile/Droid.debug i386
    > screen
    panic: can't fifo/vnode bypass -1
    KDB: enter: panic
    [thread pid 146 tid 100053 ]
    Stopped ad kdb_enter+0x30: leave
    db> trace
    Tracing pid 146 tid 100057 td 0xc1932af0
    kdb_enter(c07e4ddb,c085bb00,c07dc744,d52c8964,100) at panic+0x30
    panic(c07dc744,ffffffff,c07dc716,11b,c1782d00) at panic+0xd5
    fifo_open(d52c89e4,c1ae3dd0,d52c8bc4,c1a833d0,d52c8a10) at fifo_open+0x660
    VOP_OPEN_APV(c083bba0,d52c89e4,c1932af0,d52c8a54,1) at VOP_OPEN_APV+0xac
    union_open(d52c8a54,d52c8a04,d52c8bc4,0,d52c8b10) at union_open+0x8e
    VOP_OPEN_APV(c1b35240,d52c8a54,267,c1932af0,1) at VOP_OPEN_APV+0xac
    vn_open_cred(d52c8bc4,d52c8cc4,0,c1782d00,4) at vn_open_cred+0x472
    vn_open(d52c8bc4,d52c8cc4,0,4,c08a7018,4) at vn_open+0x33
    kern_open(c1932af0,808e220,0,5,0) at kern_open+0xc8
    open(c1932af0,d52c8d04,c,422,3) at open+0x36
    syscall(bfbf003b,3b,bfbf003b,4,3) at syscall+0x2c0
    Xint0x80_syscall() at Xint0x80_syscall+0x1f
    --- syscall(5, FreeBSD ELF32, open), eip = 0x28172e5f, esp =
    0xbfbfe00c, ebp = 0xbfbfe158 ---
    db> ps
    pid proc uid ppid pgrp flag stat wmesg wchan cmd
    146 c1a4720c 0 145 145 000002 [CPU 0] screen
    145 c1a47000 0 73 145 0004002 [SLP0 pause 0xc1a47034][SLP] screen
    138 c1921418 0 0 0 0000204 [SLP0 mdwait 0xc1a90000][SLP] md1
    73 c1a47418 0 54 73 0004002 [SLP0 pause 0xc1a4744c][SLP] tcsh
    54 c1a47624 0 1 54 0004002 [SLP0 wait 0xc1a47624][SLP] sh
    ...kernel threads here...
    Panic was copied by hand - i have no serial console; but i can set up one.
    Pleace advice me if i provided right information (or You need more).

    The dmesg is on http://mclone.org.ua/~mclone/dmesg.6b3.txt
    (they're from slightly older kernel; i'll reboot and replace ASAP)
    Kernel config is here: http://mclone.org.ua/~mclone/Droid.debug
    Nothing fancy (except verbose load) in /boot/loader.conf,
    and i have only CPUTYPE?=i686 and WITH_OPT_PPRO=yes
    in /etc/make.conf [coupled with various ports defines, that is]. 

    -- 
wbr,                        |\      _,,,---,,_           dog bless ya!
`                       Zzz /,`.-'`'    -.  ;-;;,_
McLone at GMail dot com    |,4-  ) )-,_. ,\ (  `'-'
  net- and *BSD admin     '---''(_/--'  `-'\_)   ...sorry for translit
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  • Next message: Peter Jeremy: "Re: HZ option [Was: Re: custom kernel + if_xl + error]"

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