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    SubjectLinux 2.1.118 SMP problem


    After booting 2.1.118-SMP on our cluster of 8 PII-266 dual processor
    machines, root file system on NFS, md driver, no screen, no keyboard,
    serial console output only, we are getting occasional lockups (while
    copying ca. 10 MBytes from the NFS root file system to a local disk (not
    an md array).

    The hardware: Tahoe Tyan II Motherboard, 192 MByte RAM, 2 x Adaptec
    2940UW, 1 x EEpro100.


    On the serial console we get the message

    wait_on_bh, CPU 0:
    irq: 1 [0 1]
    bh: 1 [0 1]
    <[c0113c4f]> <[c0175342]> <[c0175424]> <[c0148761]>

    repeating every few seconds.

    System.map says:

    del_timer __rpc_wake_up rpc_wake_up_task nfs_updatepage


    Cheers

    Steffen


    +---------------------------------+
    ! Dr. Steffen Luitz !
    ! CERN / EP Division !
    ! CH-1211 Geneve 23 !
    ! e-mail: Steffen.Luitz@cern.ch ! !
    +---------------------------------+








    2.1.114-SMP did much better (ca. 1 crash / day / 8 machines under heavy
    disk and network I/O)


    Cheers

    Steffen










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    Linux version 2.1.118 (root@pcna48ctl.cern.ch) (gcc version 2.7.2.3) #3
    SMP Wed Aug 26 11:53:44 MEST 1998

    and I got a repeating

    wait_on_bh, CPU 0:
    irq: 1 [0 1]
    bh: 1 [0 1]
    <[c0113c4f]> <[c0175342]> <[c0175424]> <[c0148761]>

    on one of the PCs.


    System.map says:

    del_timer __rpc_wake_up rpc_wake_up_task nfs_updatepage

    This seems to happen during copying 10-15 MByte of data from NFS-root to a
    local disk file system. It doesn't happen all the time, at the next boot
    it worked on that PC.


    Cheers

    Steffen






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