Date: Mon, 15 Nov 2004 20:55:14 +0200 From: Ruslan Ermilov <ru@freebsd.org> To: John Baldwin <jhb@freebsd.org> Cc: alpha@freebsd.org Subject: Re: Removing VGA card panics the box on boot Message-ID: <20041115185514.GA65300@ip.net.ua> In-Reply-To: <200411151112.49535.jhb@FreeBSD.org> References: <20041115081659.GA30262@ip.net.ua> <200411151112.49535.jhb@FreeBSD.org>
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--qDbXVdCdHGoSgWSk Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Nov 15, 2004 at 11:12:49AM -0500, John Baldwin wrote: > On Monday 15 November 2004 03:16 am, Ruslan Ermilov wrote: > > Hi there, > > > > I needed the unused PCI VGA card for testing another machine, > > so I pulled it out from my AlphaPC 164SX, and that gave me an > > > > instant panic on boot: > > : Timecounter "i8254" frequency 1193182 Hz quality 0 > > : Timecounter "alpha" frequency 533183689 Hz quality 800 > > : Timecounters tick every 0.976 msec > > : panic: mtx_lock() of spin mutex (null) @ /usr/src/sys/netinet/igmp.c:= 431 > > : cpuid =3D 0 > > : KDB: enter: panic > > : [thread 100004] > > : Stopped at kdb_enter+0x48: or zero,zero,zero <zero=3D0x0> > > : db> > > > > Putting it back in results in normal behavior (no panic). > > Any hints? >=20 > Sounds like something is messing with free'd memory through a stale point= er=20 > and happens to be trashing that spin mutex as a result. Not sure on how = to=20 > track it down however. >=20 The funny thing is that it happens in exactly this same place, and only when I pull the VGA card out. ;) Cheers, --=20 Ruslan Ermilov ru@FreeBSD.org FreeBSD committer --qDbXVdCdHGoSgWSk Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (FreeBSD) iD8DBQFBmPuSqRfpzJluFF4RAnyMAJ9BepQfSMed1B5qCY8X2LP8Wf/s0QCfZxYi isNA+JEIl7Qvwhlu9JY0LGA= =69Dr -----END PGP SIGNATURE----- --qDbXVdCdHGoSgWSk--
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