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    SubjectRe: 2.4.20 st + aic7xxx (Adaptec 19160B) + VIA KT333 repeatable freeze
    On Sun, Dec 15, 2002 at 10:42:40PM +1100, Keith Owens wrote:
    > On Fri, 13 Dec 2002 11:51:27 +1100,
    > Kevin Easton <> wrote:
    > >I'm not sure exactly where this problem fits in, but I'm getting a
    > >completely repeatable freeze (100% lockup, no response to keyboard)
    > >triggered by writing to /dev/st0 (dd if=/dev/urandom of=/dev/st0 bs=512
    > >count=163840 will reproduce it).
    > >So... does anyone have any ideas how I should start trying to track this
    > >down?
    > Boot with nmi_watchdog=1 (smp) or nmi_watchdog=2 (smp or up), cat
    > /proc/interrupts to verify that NMI is being used. If the problem is a
    > disabled spinloop then the watchdog will trip after 5 seconds and give
    > you a trace which can be run through ksymoops. If that trace does not
    > give enough data to debug the problem, apply the kdb patch[*], read
    > Documentation/kdb and start digging, bt first and debug from there.

    Thanks, will try that in the morning.

    - Kevin.

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