Date: Wed, 17 Dec 2008 15:30:48 +0100 From: "Alexey Shuvaev" <shuvaev@physik.uni-wuerzburg.de> To: freebsd-current@freebsd.org Subject: Re: hangup (livelock) - db> prompt in endless loop Message-ID: <20081217143048.GA86431@wep4035.physik.uni-wuerzburg.de> In-Reply-To: <3a142e750812170612j1d656284s20c65542b85578eb@mail.gmail.com> References: <4947C526.2080702@citrin.ru> <20081217100406.GA1595@wep4035.physik.uni-wuerzburg.de> <3a142e750812170612j1d656284s20c65542b85578eb@mail.gmail.com>
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On Wed, Dec 17, 2008 at 03:12:40PM +0100, Paul B. Mahol wrote: > On 12/17/08, Alexey Shuvaev <shuvaev@physik.uni-wuerzburg.de> wrote: > > On Tue, Dec 16, 2008 at 06:11:34PM +0300, Anton Yuzhaninov wrote: > >> My box with fresh current sometimes stops to respond. > >> > >> On screen in endless loop printed debugger prompt > >> > >> db> > >> > >> but I can't type anything here. > >> > >> Alt+Ctrl+Esc and Alt+Ctrl+Del don't stops this loop. > >> > >> How I can debug this problem? > >> > >> system: current from Mon Dec 15 16:16:23 MSK 2008 with GENERIC kernel, > >> amd64, SMP. > >> > > Me too! > > > > The system is: > > # uname -a > > FreeBSD wep4035 8.0-CURRENT FreeBSD 8.0-CURRENT #0: Mon Dec 15 14:21:48 CET > > 2008 > > root@wep4035:/usr/obj/usr/src/sys/USB2 amd64 > > > > It can hang even in single user mode with only / mounted read-only, > > but with already configured network (msk). I have never seen how it > > happens, however :( > > Looks like syscons problem, does it happen with kern.smp.disabled=1? > I don't see it yet for FreeBSD wep4035 8.0-CURRENT FreeBSD 8.0-CURRENT #0: Tue Dec 16 18:47:56 CET 2008 root@wep4035:/usr/obj/usr/src/sys/USB2 amd64 With 15 Dec current it should already be hanging. Alexey.
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