Date: Sun, 17 Jul 2005 20:29:56 +0200 From: Csaba Henk <csaba-ml@creo.hu> To: freebsd-questions@freebsd.org Subject: early panic and dump Message-ID: <20050717182956.GJ73367@beastie.creo.hu>
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I sent the following post to freebsd-current, but maybe it's better to be sent to questions -- the problem of dumping as such is not a current-specific question... > Hi! > > I tried to install both RELENG-6 and CURRENT, and both kernels behaved > the same way: panicked quite early (before init) with a page fault. Has > anyone met with this phenomena? > > I'd like to show you some fancy backtracks, but as it all happened before > starting init, rc.conf settings won't help me in getting the dump. > > What I've read: > > "the dump device can be hard-coded via the dump clause in the config(5) > line of a kernel configuration file." > > But putting > > dump /dev/ad0s4 > > into the config file is considered a syntax error, and the man page > of config doesn't contain anything about dumping. > > Another thing which I found on the net suggests setting the dumpdev > variable in the loader(8). I can do that, but it doesn't make a difference, > and again, the man page doesn't mention dumping. > > How to get that wacky dump these days? > > TIA. > > Cheers, > Csaba Note that the above quote is from Developers Handbook and the full quote is: Alternatively, the dump device can be hard-coded via the dump clause in the config(5) line of a kernel configuration file. This approach is deprecated and should be used only if a kernel is crashing before dumpon(8) can be executed. And that I fall into the "only if" case. Thanks. Csaba
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