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    SubjectSimultaneous network/IDE traffic = reboot
    Hi,

    I have stumbled upon a _big_ problem with my machine. It makes a silent
    and instantaneous soft reboot when performing (pretty tough) disk and
    network access at the same time. I noticed this when trying to transfer
    some 10+ Mb files from this machine as the screen just turned black and
    the BIOS "welcome" screen appeared. No kernel oops or other message,
    just a plain reboot. I can't find anything in the logs either. *sigh*

    If I am using the machine "normally" everything works just fine. That is
    no fiddling with large files or performing any extreme network activity.

    I have found a very simple way of reproducing the crash. Just do a 'ping
    -f' to the machine for a second or so and run 'hdparm -t /dev/hda' at
    the same time. It reboots almost immediately. One more thing, if I do
    'ping -f' locally no matter to what address/if, I can't make it crash.
    But from another machine - reboot.

    I have checked everything I can think of, i.e. conflicting IRQ:s, DMA
    etc. I have tried to reassign almost everything in the BIOS but to no
    avail. Also tested the 2.2.9 kernel but same thing there. I do not know
    what to do next, does anyone of you have an idea?

    Some facts about the machine:
    Intel Celeron 333
    128Mb DIMM
    Motherboard Abit BH6 (Award BIOS rev 4.51PG)
    2pcs NIC 3Com 3C905B-TX
    Seagate Medalist ST38420A IDE 8,6Gb
    Redhat 6.0 (kernel build 2.2.5-15)

    Attached are some files from /proc that may or may not help you to help
    me.

    Regards,
    /Roland::::::::::::::
    cpuinfo
    ::::::::::::::
    processor : 0
    vendor_id : GenuineIntel
    cpu family : 6
    model : 6
    model name : Celeron (Mendocino)
    stepping : 0
    cpu MHz : 334.098612
    cache size : 128 KB
    fdiv_bug : no
    hlt_bug : no
    sep_bug : no
    f00f_bug : no
    fpu : yes
    fpu_exception : yes
    cpuid level : 2
    wp : yes
    flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 mmx osfxsr
    bogomips : 333.41

    ::::::::::::::
    devices
    ::::::::::::::
    Character devices:
    1 mem
    2 pty
    3 ttyp
    4 ttyS
    5 cua
    7 vcs
    10 misc
    29 fb
    36 netlink
    128 ptm
    136 pts

    Block devices:
    1 ramdisk
    3 ide0
    9 md
    ::::::::::::::
    dma
    ::::::::::::::
    4: cascade
    ::::::::::::::
    dmesg
    ::::::::::::::
    Linux version 2.2.5-15 (root@porky.devel.redhat.com) (gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)) #1 Mon Apr 19 23:00:46 EDT 1999
    Detected 334098612 Hz processor.
    Console: colour dummy device 80x25
    Calibrating delay loop... 333.41 BogoMIPS
    Memory: 63140k/65536k available (996k kernel code, 412k reserved, 928k data, 60k init)
    VFS: Diskquotas version dquot_6.4.0 initialized
    CPU: Intel Celeron (Mendocino) stepping 00
    Checking 386/387 coupling... OK, FPU using exception 16 error reporting.
    Checking 'hlt' instruction... OK.
    POSIX conformance testing by UNIFIX
    mtrr: v1.26 (19981001) Richard Gooch (rgooch@atnf.csiro.au)
    PCI: PCI BIOS revision 2.10 entry at 0xfb460
    PCI: Using configuration type 1
    PCI: Probing PCI hardware
    Linux NET4.0 for Linux 2.2
    Based upon Swansea University Computer Society NET3.039
    NET4: Unix domain sockets 1.0 for Linux NET4.0.
    NET4: Linux TCP/IP 1.0 for NET4.0
    IP Protocols: ICMP, UDP, TCP, IGMP
    Initializing RT netlink socket
    Starting kswapd v 1.5
    vesafb: framebuffer at 0xe6000000, mapped to 0xc4800000, size 4096k
    vesafb: mode is 1024x768x32, linelength=4096, pages=0
    vesafb: protected mode interface info at c000:7ee0
    vesafb: scrolling: redraw
    vesafb: directcolor: size=8:8:8:8, shift=24:16:8:0
    Console: switching to colour frame buffer device 128x48
    fb0: VESA VGA frame buffer device
    Detected PS/2 Mouse Port.
    Serial driver version 4.27 with MANY_PORTS MULTIPORT SHARE_IRQ enabled
    ttyS00 at 0x03f8 (irq = 4) is a 16550A
    pty: 256 Unix98 ptys configured
    apm: BIOS version 1.2 Flags 0x07 (Driver version 1.9)
    Real Time Clock Driver v1.09
    RAM disk driver initialized: 16 RAM disks of 4096K size
    PIIX4: IDE controller on PCI bus 00 dev 39
    PIIX4: not 100% native mode: will probe irqs later
    ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:DMA, hdb:DMA
    ide1: BM-DMA at 0xf008-0xf00f, BIOS settings: hdc:DMA, hdd:DMA
    hda: ST38420A, ATA DISK drive
    hdb: Pioneer CD-ROM ATAPI Model DR-A12X 0100, ATAPI CDROM drive
    ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
    hda: ST38420A, 8223MB w/512kB Cache, CHS=1048/255/63
    hdb: ATAPI 12X CD-ROM drive, 128kB Cache
    Uniform CDROM driver Revision: 2.54
    floppy0: no floppy controllers found
    md driver 0.90.0 MAX_MD_DEVS=256, MAX_REAL=12
    raid5: measuring checksumming speed
    raid5: using high-speed MMX checksum routine
    pII_mmx : 813.054 MB/sec
    p5_mmx : 787.908 MB/sec
    8regs : 576.072 MB/sec
    32regs : 413.766 MB/sec
    using fastest function: pII_mmx (813.054 MB/sec)
    scsi : 0 hosts.
    scsi : detected total.
    md.c: sizeof(mdp_super_t) = 4096
    Partition check:
    hda: hda1 hda2 < hda5 hda6 hda7 hda8 hda9 >
    autodetecting RAID arrays
    autorun ...
    ... autorun DONE.
    VFS: Mounted root (ext2 filesystem) readonly.
    Freeing unused kernel memory: 60k freed
    Adding Swap: 72256k swap-space (priority -1)
    3c59x.c:v0.99H 11/17/98 Donald Becker http://cesdis.gsfc.nasa.gov/linux/drivers/vortex.html
    eth0: 3Com 3c905B Cyclone 100baseTx at 0xe400, 00:50:04:35:47:48, IRQ 10
    Internal config register is 1800000, transceivers 0xa.
    8K byte-wide RAM 5:3 Rx:Tx split, autoselect/Autonegotiate interface.
    MII transceiver found at address 24, status 786d.
    MII transceiver found at address 0, status 786d.
    Enabling bus-master transmits and whole-frame receives.
    eth1: 3Com 3c905B Cyclone 100baseTx at 0xe800, 00:50:04:35:44:e8, IRQ 11
    Internal config register is 1800000, transceivers 0xa.
    8K byte-wide RAM 5:3 Rx:Tx split, autoselect/Autonegotiate interface.
    MII transceiver found at address 24, status 786d.
    MII transceiver found at address 0, status 786d.
    Enabling bus-master transmits and whole-frame receives.
    eth0: Initial media type Autonegotiate.
    eth0: MII #24 status 786d, link partner capability 0020, setting half-duplex.
    eth0: vortex_open() InternalConfig 01800000.
    eth0: vortex_open() irq 10 media status 8080.
    eth1: Initial media type Autonegotiate.
    eth1: MII #24 status 786d, link partner capability 41e1, setting full-duplex.
    eth1: vortex_open() InternalConfig 01800000.
    eth1: vortex_open() irq 11 media status 8080.
    eth0: Media selection timer tick happened, Autonegotiate.
    eth0: MII transceiver has status 7869.
    eth1: Media selection timer tick happened, Autonegotiate.
    eth1: MII transceiver has status 7869.
    Installing knfsd (copyright (C) 1996 okir@monad.swb.de).
    nfsd_init: initialized fhcache, entries=256
    CSLIP: code copyright 1989 Regents of the University of California
    SLIP: version 0.8.4-NET3.019-NEWTTY-MODULAR (dynamic channels, max=256) (6 bit encapsulation enabled).
    SLIP linefill/keepalive option.
    cat uses obsolete /proc/pci interface
    ::::::::::::::
    interrupts
    ::::::::::::::
    CPU0
    0: 87868 XT-PIC timer
    1: 933 XT-PIC keyboard
    2: 0 XT-PIC cascade
    8: 2 XT-PIC rtc
    10: 1598 XT-PIC eth0
    11: 441 XT-PIC eth1
    13: 1 XT-PIC fpu
    14: 654584 XT-PIC ide0
    NMI: 0
    ::::::::::::::
    ioports
    ::::::::::::::
    0000-001f : dma1
    0020-003f : pic1
    0040-005f : timer
    0060-006f : keyboard
    0070-007f : rtc
    0080-008f : dma page reg
    00a0-00bf : pic2
    00c0-00df : dma2
    00f0-00ff : fpu
    01f0-01f7 : ide0
    03c0-03df : vga+
    03f6-03f6 : ide0
    03f8-03ff : serial(auto)
    e400-e47f : eth0
    e800-e87f : eth1
    f000-f007 : ide0
    f008-f00f : ide1
    ::::::::::::::
    modules
    ::::::::::::::
    slip 7636 2 (autoclean)
    slhc 4392 1 (autoclean) [slip]
    nfsd 151576 8 (autoclean)
    lockd 31208 1 (autoclean) [nfsd]
    sunrpc 52420 1 (autoclean) [nfsd lockd]
    3c59x 18472 2 (autoclean)
    ::::::::::::::
    pci
    ::::::::::::::
    PCI devices found:
    Bus 0, device 0, function 0:
    Host bridge: Intel 440BX - 82443BX Host (rev 2).
    Medium devsel. Master Capable. Latency=64.
    Prefetchable 32 bit memory at 0xe0000000 [0xe0000008].
    Bus 0, device 1, function 0:
    PCI bridge: Intel 440BX - 82443BX AGP (rev 2).
    Medium devsel. Master Capable. Latency=64. Min Gnt=128.
    Bus 0, device 7, function 0:
    ISA bridge: Intel 82371AB PIIX4 ISA (rev 2).
    Medium devsel. Fast back-to-back capable. Master Capable. No bursts.
    Bus 0, device 7, function 1:
    IDE interface: Intel 82371AB PIIX4 IDE (rev 1).
    Medium devsel. Fast back-to-back capable. Master Capable. Latency=64.
    I/O at 0xf000 [0xf001].
    Bus 0, device 7, function 2:
    USB Controller: Intel 82371AB PIIX4 USB (rev 1).
    Medium devsel. Fast back-to-back capable. Master Capable. Latency=64.
    I/O at 0xe000 [0xe001].
    Bus 0, device 7, function 3:
    Bridge: Intel 82371AB PIIX4 ACPI (rev 2).
    Medium devsel. Fast back-to-back capable.
    Bus 0, device 13, function 0:
    Ethernet controller: 3Com 3C905B 100bTX (rev 48).
    Medium devsel. IRQ 10. Master Capable. Latency=64. Min Gnt=10.Max Lat=10.
    I/O at 0xe400 [0xe401].
    Non-prefetchable 32 bit memory at 0xea001000 [0xea001000].
    Bus 0, device 15, function 0:
    Ethernet controller: 3Com 3C905B 100bTX (rev 48).
    Medium devsel. IRQ 11. Master Capable. Latency=64. Min Gnt=10.Max Lat=10.
    I/O at 0xe800 [0xe801].
    Non-prefetchable 32 bit memory at 0xea000000 [0xea000000].
    Bus 0, device 17, function 0:
    VGA compatible controller: Matrox Mystique (rev 3).
    Medium devsel. Fast back-to-back capable. Master Capable. Latency=64.
    Prefetchable 32 bit memory at 0xe6000000 [0xe6000008].
    Non-prefetchable 32 bit memory at 0xe7000000 [0xe7000000].
    Non-prefetchable 32 bit memory at 0xe8000000 [0xe8000000].

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