Date: Mon, 15 Nov 2004 11:12:49 -0500 From: John Baldwin <jhb@FreeBSD.org> To: freebsd-alpha@FreeBSD.org Cc: Ruslan Ermilov <ru@FreeBSD.org> Subject: Re: Removing VGA card panics the box on boot Message-ID: <200411151112.49535.jhb@FreeBSD.org> In-Reply-To: <20041115081659.GA30262@ip.net.ua> References: <20041115081659.GA30262@ip.net.ua>
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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 = 0 > : KDB: enter: panic > : [thread 100004] > : Stopped at kdb_enter+0x48: or zero,zero,zero <zero=0x0> > : db> > > Putting it back in results in normal behavior (no panic). > Any hints? Sounds like something is messing with free'd memory through a stale pointer and happens to be trashing that spin mutex as a result. Not sure on how to track it down however. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org
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