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Date:      Tue, 8 Jan 2002 12:58:58 -0800 (PST)
From:      Doug White <dwhite@resnet.uoregon.edu>
To:        Josh Paetzel <friar_josh@webwarrior.net>
Cc:        freebsd-stable@FreeBSD.ORG
Subject:   Re: Reproducable system hangs in -STABLE
Message-ID:  <20020108125734.S84761-100000@resnet.uoregon.edu>
In-Reply-To: <20020107200706.B17764@twincat.vladsempire.net>

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On Mon, 7 Jan 2002, Josh Paetzel wrote:

> > > While running two copies of dnetc, running xmms will hang my system
> > > with a hard lock up.

I think I've seen this appear before for non-priority problems too though
... hm ...

> > This is the classic priority inversion problem. How are you starting your
> > dnetc's?

> They are starting at boot time from the script that the port installs
> into /usr/local/etc/rc.d

Make sure you are NOT nice(1)ing dnetc OR xmms.  nice -20 or idprio'ing
dnetc will cause an instant lockup.

What happens if you run only one dnetc?

Doug White                    |  FreeBSD: The Power to Serve
dwhite@resnet.uoregon.edu     |  www.FreeBSD.org


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