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    Subject2.2.7 LCA machinecheck...
    Hi,

    I'm running an webserver on an Alpha system (LCA PCI-33 @166MHz)

    The machine has two ethernet boards (RTL8139) one is used to
    connect to my ISP and the other to connect to a database server.

    When I performed some 'heavy' nfs filecopying (read: backup the
    html stuff to the database machine) I got the following messages
    in the logs:

    portmap: RPC call returned error 61
    RPC: task of released request still queued!
    RPC: (task is on xprt_pending)
    lca: machine check (la=0xfffffc00002084d0,pc=0xfffffc000042fa50)

    Reason: access to non-existent memory (long frame):
    reason: fffffffffffffff8 exc_addr: fffffc000042fa50
    dc_stat: 3
    car: 403cd251
    A read error to memory occurred at address 3000000
    Several other uncorrectable errors occurred.
    Attempted to access non-existent memory.
    + 0 0000000000000198 0000019800000110
    + 10 0000000100000084 fffffffffffffff8
    + 20 000006f800000000 0000000000000000
    + 30 0000000000000001 0000000000000007
    + 40 0000000000000001 0000000000000500
    + 50 0000000000000008 0000000000000000
    + 60 fffffc00003103e0 fffffc0000310620
    + 70 fffffc0000310520 fffffc0000310460
    + 80 fffffc0000310938 fffffc0000310b78
    + 90 fffffc00003105a0 fffffc0000208000
    + a0 000000011fffe138 fffffc0001277ad8
    + b0 fffffc00004a3b80 0000000000000640
    + c0 0032323a3a3e3e3e 0000000000000003
    etc.

    this is how /proc/pci looks like:

    PCI devices found:
    Bus 0, device 6, function 0:
    Non-VGA device: NCR 53c810 (rev 1).
    Medium devsel. IRQ 11. Master Capable. Latency=32.
    I/O at 0x8000 [0x8001].
    Non-prefetchable 32 bit memory at 0x4200000 [0x4200000].
    Bus 0, device 7, function 0:
    Non-VGA device: Intel 82378IB (rev 3).
    Medium devsel. Master Capable. No bursts.
    Bus 0, device 8, function 0:
    Ethernet controller: Realtek 8139 (rev 16).
    Medium devsel. Fast back-to-back capable. IRQ 10.
    Master Capable. Latency=32. Min Gnt=32.Max Lat=64.
    I/O at 0x8800 [0x8801].
    Non-prefetchable 32 bit memory at 0x4201000 [0x4201000].
    Bus 0, device 11, function 0:
    VGA compatible controller: S3 Inc. ViRGE/DX or /GX (rev 1).
    Medium devsel. IRQ 13. Master Capable. Latency=32. Min
    Gnt=4.Max Lat=255.
    Non-prefetchable 32 bit memory at 0x14000000 [0x14000000].

    Bus 0, device 12, function 0:
    Ethernet controller: Realtek 8139 (rev 16).
    Medium devsel. Fast back-to-back capable. IRQ 15.
    Master Capable. Latency=32. Min Gnt=32.Max Lat=64.
    I/O at 0x9000 [0x9001].
    Non-prefetchable 32 bit memory at 0x19000000 [0x19000000].



    How should I interpret 'Attempted to access non-existent
    memory', normally this would result in a segfault wouldn't it ?
    Is this serious hardware trouble or what ?

    The system has 48 Mb RAM.

    Gert

    --
    ======================================================================
    = LINUX = Unix The Next Generation ................................ =
    = gertk@rendo.dekooi.nl running Linux on Intel and Alpha =
    ======================================================================




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