Date: Thu, 10 Jan 2002 21:15:29 +0300 (MSK) From: Dmitry Morozovsky <marck@rinet.ru> To: Doug White <dwhite@resnet.uoregon.edu> Cc: Josh Paetzel <friar_josh@webwarrior.net>, <freebsd-stable@FreeBSD.ORG> Subject: Re: Reproducable system hangs in -STABLE Message-ID: <20020110211312.C15653-100000@woozle.rinet.ru> In-Reply-To: <20020108125734.S84761-100000@resnet.uoregon.edu>
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On Tue, 8 Jan 2002, Doug White wrote: DW> > > > While running two copies of dnetc, running xmms will hang my system DW> > > > with a hard lock up. DW> DW> I think I've seen this appear before for non-priority problems too though DW> ... hm ... DW> DW> > > This is the classic priority inversion problem. How are you starting your DW> > > dnetc's? DW> DW> > They are starting at boot time from the script that the port installs DW> > into /usr/local/etc/rc.d DW> DW> Make sure you are NOT nice(1)ing dnetc OR xmms. nice -20 or idprio'ing DW> dnetc will cause an instant lockup. DW> DW> What happens if you run only one dnetc? Hmm... Is it related to SMP machines only or to uni-processor machines too? I have no SMP machines with dnetc's around to test, but every UP machine with dnetc starts it reniced -20, and there were no lockups at all... Also, would you please give me a link to thread/article duscussing "classic priority inversion proble"? Thanks. Sincerely, D.Marck [DM5020, DM268-RIPE, DM3-RIPN] ------------------------------------------------------------------------ *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru *** ------------------------------------------------------------------------ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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