Re: scheduler (sched_4bsd) questions

From: Stephan Uphoff (ups_at_tree.com)
Date: 10/05/04

  • Next message: Peter Holm: "Re: scheduler (sched_4bsd) questions" 
    To: Peter Holm <peter@holm.cc>
Date: Mon, 04 Oct 2004 23:12:38 -0400

    On Mon, 2004-10-04 at 14:49, Peter Holm wrote:
    > On Mon, Oct 04, 2004 at 01:34:38PM -0400, Stephan Uphoff wrote:
    ---- snip ----
    > > - but my time budget is limited and Peter has an interesting bug left
    > > that has priority.
    >
    > I'm not closer to being able to create this panic in a controlled way.
    > After a whole day of different tests I finally got this panic:
    > http://www.holm.cc/stress/log/cons81.html. The trigger seems to be one
    > particular Java applet, but it is not easily reproduceable.
    >
    > - Peter
    ---- snip ----

    I found a race condition in sleepq_catch_signals / sleepq_resume_thread
    that may cause sleepq_resume_thread to add a thread to the run queue
    that is already there.

    This could explain your crash.

    Shouldn't be to hard to fix but I am burned out today :-(.

            Stephan

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  • Next message: Peter Holm: "Re: scheduler (sched_4bsd) questions"

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