Date: Tue, 13 Sep 2005 02:00:21 +0000 From: Ben Kaduk <minimarmot@gmail.com> To: Alexander Leidinger <Alexander@leidinger.net>, freebsd-current@freebsd.org Subject: Re: panic upon kldunload snd_ich (lor # 159) Message-ID: <47d0403c050912190015fa9273@mail.gmail.com> In-Reply-To: <20050912204405.14437629@Magellan.Leidinger.net> References: <47d0403c05091121047a037946@mail.gmail.com> <20050912204405.14437629@Magellan.Leidinger.net>
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On 9/12/05, Alexander Leidinger <Alexander@leidinger.net> wrote: >=20 > On Mon, 12 Sep 2005 04:04:48 +0000 > Ben Kaduk <minimarmot@gmail.com> wrote: >=20 > > Booting to single user and issuing: > > # kldload snd_ich > > # kldunload snd_ich > > > > are sufficient to trigger the panic on my system. I know that Alexander > > Leidinger has recently committed some bits to current in the sound code= ,=20 > but > > it is unclear if it will fix my panic; I'm currently cvsup-ing and=20 > building > > world to find out. > > > > The machine in question is: > > > > bash-2.05b$ uname -a > > FreeBSD prolepsis.math.uiuc.edu <http://prolepsis.math.uiuc.edu>; < > http://prolepsis.math.uiuc.edu>; > > 7.0-CURRENTFreeBSD > > 7.0-CURRENT #9: Thu Aug 25 06:22:00 UTC 2005 > > kaduk@prolepsis.math.uiuc.edu:/usr/obj/usr/src/sys/PROLEPSIS > > i386 >=20 > You should update to a -current which has: > ---snip--- > $FreeBSD: src/sys/dev/sound/pcm/sound.c,v 1.96 2005/09/12 18:33:33=20 > netchild Exp $ > $FreeBSD: src/sys/dev/sound/pcm/dsp.c,v 1.84 2005/09/12 18:33:33 netchild= =20 > Exp $ > ---snip--- >=20 > If it still panics we need to get a backtrace (please have a look at > the kernel-debugging chapter in the handbook; taking a backtrace isn't > hard). >=20 > Bye, > Alexander. >=20 > -- > 0 and 1. Now what could be so hard about that? >=20 > http://www.Leidinger.net Alexander @ Leidinger.net <http://Leidinger.net>; > GPG fingerprint =3D C518 BC70 E67F 143F BE91 3365 79E2 9C60 B006 3FE7 >=20 I upgraded to todays current, with=20 $FreeBSD: src/sys/dev/sound/pcm/sound.c,v 1.96 2005/09/12 18:33:33 netchild= =20 Exp $ and $FreeBSD: src/sys/dev/sound/pcm/dsp.c,v 1.84 2005/09/12 18:33:33 netchild= =20 Exp $, and the panic still occurs, even in single-user. I can dump without=20 complaints, but since my /var is only 256 M, I have been manually running= =20 savecore in single user, saving cores in /usr/crash (perhaps I should try= =20 with hw.physmem=3D200M); this latest core seems to have problems: prolepsis# kgdb /usr/obj/usr/src/sys/PROLEPSIS/kernel.debug=20 /usr/crash/vmcore.0 results in a (infinite) loop of: kgdb: kvm_read: invalid address (0xf0) so this could be tough to debug. I will try to get an automatic dump on=20 /var, and if that fails, set up a serial console and leave the machine in= =20 the debugger. Ben Kaduk
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