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    SubjectRe: Kernel Hang ( linux 2.2.x x<=10 )
    At 09:56 16/06/99 +0100, Alan Cox wrote:
    >> I have seen this behaviour with stock 2.2.7, 2.2.9 and 2.2.10. I have tried
    >> reproducing it with 2.2.5-22 (the latest RedHat 6.0 kernel update), but
    could
    >> NOT. That kernel seems to behave properly.

    Correction. I _have_ been able to reproduce the problem with 2.2.5-22. It
    is not as predictable as 2.2.10, however.

    Digging further, I have compiled a stock 2.2.4, without SCSI support at all.
    I couldn't reproduce the problem immediately, but will do further testing.

    >When it hangs does it a) still respond to pings b) does right-alt scrolllock
    >a few times show anything (you will want to be outside of X11). If so then
    >the data from b) wil help find any hang. If not then you probably want
    >to run the kernel debug patch and see what it reports

    a) No replies to ping
    b) right-alt scrolllock does nothing anymore. It works great before the
    lockup, however.

    The kernel debug patch you mean is the one by Scott Lurndal that can be
    found at http://reality.sgi.com/slurn_engr/, right?
    The latest patch there was for kernel 2.2.4, but as I could not reproduce
    the problem reliably with that kernel, I've updated the diff file to work
    on a stock 2.2.10. It is attached, maybe it can be useful to someone else.
    It works for me.

    What exactly do you want me to do with the kernel debugger?

    Ward.

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