apparent lock contention

bn_at_donut.ugcs.caltech.edu
Date: 01/21/04

  • Next message: Clive Lin: "Undocked X31 oddity, might be ATA related." 
    Date: Wed, 21 Jan 2004 11:19:32 -0800
To: current@freebsd.org

    Under moderate levels of I/O and light processing load, I
    experience what appears to be severe contention on Giant
    with several processes at a time holding in state "*Giant*"
    for several seconds each.

    The problem was initiated by a umount operation on a UFS fs
    which completed successfully after about ten minutes of
    whirling.

    This is a SMP system running 5.2-R.

    Can anyone tell me how I might better diagnose what is going
    on?

    Thanks.
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  • Next message: Clive Lin: "Undocked X31 oddity, might be ATA related."