Date: Mon, 04 Oct 2004 23:12:38 -0400 From: Stephan Uphoff <ups@tree.com> To: Peter Holm <peter@holm.cc> Cc: "freebsd-arch@freebsd.org" <freebsd-arch@FreeBSD.org> Subject: Re: scheduler (sched_4bsd) questions Message-ID: <1096945958.46385.44.camel@palm.tree.com> In-Reply-To: <20041004184939.GA8178@peter.osted.lan> References: <1095468747.31297.241.camel@palm.tree.com> <1096496057.3733.2163.camel@palm.tree.com> <1096603981.21577.195.camel@palm.tree.com> <200410041131.35387.jhb@FreeBSD.org> <1096911278.44307.17.camel@palm.tree.com> <20041004184939.GA8178@peter.osted.lan>
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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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