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    Subjectoops unmounting a jaz disk 2.4.23
    kernel is stock 2.4.23 (no extra patches).  Jaz disk is on an aha2906
    controller (controller 1) as id6. There is also an aha2940u controller
    (controller 0). Machine is a dual pIII 1.0ghz 1024mb ram. Kernel was
    compiled for 4GB high memory.

    Keep me in the CC. I'm not subscribed.

    Oops:
    ksymoops 2.4.5 on i686 2.4.23. Options used
    -v /usr/src/linux/potato/2.4.23/vmlinux (specified)
    -k /proc/ksyms (default)
    -l /proc/modules (default)
    -o /lib/modules/2.4.23/ (default)
    -m /boot/System.map-2.4.23 (default)

    Reading Oops report from the terminal
    kernel BUG at ll_rw_blk.c:1018!
    invalid operand: 0000
    CPU: 0
    EIP: 0010:[<c01baa22>] Not tainted
    EFLAGS: 00010246
    eax: 00000080 ebx: 00000001 ecx: 00000200 edx: e6a29ae0
    esi: e6a29ae0 edi: 00000001 ebp: 00000000 esp: cf70bcdc
    ds: 0018 es: 0018 ss: 0018
    Process umount (pid: 2041, stackpage=cf70b000)
    Stack: c01d030c f7ebe078 00000000 00000014 f7ebe08c 00000007 f7ec2000
    c02e6d50
    00000200 00000000 00000000 f78ef448 00000000 00000008 00001040
    c01d0d78
    00000810 e6a29ae0 00000008 00000001 c01bb1d4 f78ef418 00000001
    e6a29ae0
    Call Trace: [<c01d030c>] [<c01d0d78>] [<c01bb1d4>] [<c01bb282>]
    [<c0144556>]
    [<c01bb438>] [<c017decd>] [<c017be21>] [<c017bc4f>] [<c01debb4>]
    [<c01e3627>]
    [<c0119296>] [<c017e321>] [<c01748b9>] [<c01488bb>] [<c015cdaf>]
    [<c015ce15>]
    [<c01076df>]

    Code: 0f 0b fa 03 59 b8 24 c0 8b 0d b0 af 2c c0 8b 42 38 29 c8 c1
    kernel BUG at ll_rw_blk.c:1018!
    invalid operand: 0000
    CPU: 0
    EIP: 0010:[<c01baa22>] Not tainted
    Using defaults from ksymoops -t elf32-i386 -a i386
    EFLAGS: 00010246
    eax: 00000080 ebx: 00000001 ecx: 00000200 edx: e6a29ae0
    esi: e6a29ae0 edi: 00000001 ebp: 00000000 esp: cf70bcdc
    ds: 0018 es: 0018 ss: 0018
    Process umount (pid: 2041, stackpage=cf70b000)
    Stack: c01d030c f7ebe078 00000000 00000014 f7ebe08c 00000007 f7ec2000
    c02e6d50
    00000200 00000000 00000000 f78ef448 00000000 00000008 00001040
    c01d0d78
    00000810 e6a29ae0 00000008 00000001 c01bb1d4 f78ef418 00000001
    e6a29ae0
    Call Trace: [<c01d030c>] [<c01d0d78>] [<c01bb1d4>] [<c01bb282>]
    [<c0144556>]
    [<c01bb438>] [<c017decd>] [<c017be21>] [<c017bc4f>] [<c01debb4>]
    [<c01e3627>]
    [<c0119296>] [<c017e321>] [<c01748b9>] [<c01488bb>] [<c015cdaf>]
    [<c015ce15>]
    [<c01076df>]
    Code: 0f 0b fa 03 59 b8 24 c0 8b 0d b0 af 2c c0 8b 42 38 29 c8 c1


    >>EIP; c01baa22 <__make_request+a2/770> <=====

    >>edx; e6a29ae0 <_end+2673c808/38512d88>
    >>esi; e6a29ae0 <_end+2673c808/38512d88>
    >>esp; cf70bcdc <_end+f41ea04/38512d88>

    Trace; c01d030c <ide_build_sglist+9c/210>
    Trace; c01d0d78 <__ide_dma_begin+38/50>
    Trace; c01bb1d4 <generic_make_request+e4/140>
    Trace; c01bb282 <submit_bh+52/100>
    Trace; c0144556 <__refile_buffer+56/70>
    Trace; c01bb438 <ll_rw_block+108/1b0>
    Trace; c017decd <journal_update_superblock+5d/a0>
    Trace; c017be21 <cleanup_journal_tail+a1/120>
    Trace; c017bc4f <log_do_checkpoint+1f/150>
    Trace; c01debb4 <__kfree_skb+104/170>
    Trace; c01e3627 <net_tx_action+57/130>
    Trace; c0119296 <schedule+2c6/520>
    Trace; c017e321 <journal_destroy+1b1/1d0>
    Trace; c01748b9 <ext3_put_super+29/1c0>
    Trace; c01488bb <kill_super+12b/160>
    Trace; c015cdaf <sys_umount+3f/90>
    Trace; c015ce15 <sys_oldumount+15/20>
    Trace; c01076df <system_call+33/38>

    Code; c01baa22 <__make_request+a2/770>
    00000000 <_EIP>:
    Code; c01baa22 <__make_request+a2/770> <=====
    0: 0f 0b ud2a <=====
    Code; c01baa24 <__make_request+a4/770>
    2: fa cli
    Code; c01baa25 <__make_request+a5/770>
    3: 03 59 b8 add 0xffffffb8(%ecx),%ebx
    Code; c01baa28 <__make_request+a8/770>
    6: 24 c0 and $0xc0,%al
    Code; c01baa2a <__make_request+aa/770>
    8: 8b 0d b0 af 2c c0 mov 0xc02cafb0,%ecx
    Code; c01baa30 <__make_request+b0/770>
    e: 8b 42 38 mov 0x38(%edx),%eax
    Code; c01baa33 <__make_request+b3/770>
    11: 29 c8 sub %ecx,%eax
    Code; c01baa35 <__make_request+b5/770>
    13: c1 00 00 roll $0x0,(%eax)

    Modules:
    ext2 37248 0 (autoclean)
    nls_iso8859-1 2844 0 (autoclean)
    isofs 18860 0 (autoclean)
    loop 10168 0 (autoclean)
    floppy 52540 0 (autoclean)
    nfs 74872 2 (autoclean)
    lockd 51664 1 (autoclean) [nfs]
    sunrpc 73152 1 (autoclean) [nfs lockd]
    tdfx 35288 1
    agpgart 14740 0 (autoclean) (unused)
    parport_pc 24008 1 (autoclean)
    lp 7264 0 (autoclean)
    parport 26504 1 (autoclean) [parport_pc lp]
    mct_u232 5784 0 (unused)
    usbserial 19740 0 [mct_u232]
    mousedev 4472 1
    hid 21828 0 (unused)
    usbmouse 2300 0 (unused)
    input 3424 0 [mousedev hid usbmouse]
    tun 4512 3 (autoclean)
    iptable_nat 16902 1 (autoclean)
    ip_conntrack 21760 1 (autoclean) [iptable_nat]
    iptable_filter 1740 0 (autoclean) (unused)
    ip_tables 12992 4 [iptable_nat iptable_filter]
    tulip 42208 1 (autoclean)
    crc32 2880 0 (autoclean) [tulip]
    eepro100 20148 1 (autoclean)
    mii 2432 0 (autoclean) [eepro100]
    uhci 27196 0 (unused)
    usbcore 64716 1 [mct_u232 usbserial hid usbmouse uhci]
    es1371 29996 2 (autoclean)
    ac97_codec 13656 0 (autoclean) [es1371]
    soundcore 3844 4 (autoclean) [es1371]
    serial 49252 0 (autoclean)
    sd_mod 11276 6 (autoclean)
    ide-scsi 10480 0 (autoclean)
    aic7xxx 153200 3 (autoclean)
    scsi_mod 59124 3 (autoclean) [sd_mod ide-scsi aic7xxx]
    raid0 3240 1 (autoclean)
    md 46656 2 (autoclean) [raid0]
    -
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