From owner-freebsd-stable Thu Jan 10 10:16: 8 2002 Delivered-To: freebsd-stable@freebsd.org Received: from woozle.rinet.ru (woozle.rinet.ru [195.54.192.68]) by hub.freebsd.org (Postfix) with ESMTP id 6E82737B416 for ; Thu, 10 Jan 2002 10:16:04 -0800 (PST) Received: from localhost (marck@localhost) by woozle.rinet.ru (8.11.6/8.11.6) with ESMTP id g0AIFTY19935; Thu, 10 Jan 2002 21:15:29 +0300 (MSK) (envelope-from marck@rinet.ru) Date: Thu, 10 Jan 2002 21:15:29 +0300 (MSK) From: Dmitry Morozovsky To: Doug White Cc: Josh Paetzel , Subject: Re: Reproducable system hangs in -STABLE In-Reply-To: <20020108125734.S84761-100000@resnet.uoregon.edu> Message-ID: <20020110211312.C15653-100000@woozle.rinet.ru> X-NCC-RegID: ru.rinet MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG 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