Date: Wed, 21 Jan 2004 08:01:25 +0900 From: Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp> To: Larry Rosenman <ler@lerctr.org> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/alpha/alpha support.s src/sys/i386/i386 swtch.s src/sys/kern kern_shutdown.c src/sys/sys systm.h Message-ID: <87fzearzqy.wl@tora.nunu.org> In-Reply-To: <58710000.1074628113@lerlaptop-red.iadfw.net> References: <200401192127.i0JLRBL3041817@repoman.freebsd.org> <20040120111923.T96919@root.org> <20040120144505.ccsc4kog4c88sgww@www.sweetdreamsracing.biz> <58710000.1074628113@lerlaptop-red.iadfw.net>
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At Tue, 20 Jan 2004 13:48:33 -0600, Larry Rosenman wrote: > > [1 <text/plain; us-ascii (quoted-printable)>] > > > --On Tuesday, January 20, 2004 14:45:05 -0500 Kenneth Culver > <culverk@sweetdreamsracing.biz> wrote: > > > >> Except when crashdumps don't work or are 1 GB+. There are a few things > >> we need: > >> > >> * Fix crash dumps. I can't get a dump on my laptop, ATA. > >> > >> * Sparse crash dumps. We don't need non-anonymous pages, for instance. > >> > >> * Fix GDB backtrace output (patch posted by gallatin@ and obrien@ may be > >> working on integrating it.) > >> > >> * Fix backtrace() so the output goes to the console log. Right now, we > >> get output that needs to be hand-transcribed or use a serial console. > > > > This is also very useful for when FreeBSD crashes when X is running. If X > > is running, the only option is a serial console, as you can't see the > > crash to transcribe it otherwise, and most people don't have the spare > > computer to use as a serial console. If you enable dcons(4), all (low level) console output are logged into a buffer in the kernel. You can recover them using dconschat(8) from the crash dump. (You don't need a FireWire port) > Or worse, as in my Laptop, NO SERIAL PORT AT ALL :-) Many laptops has a FireWire port which can be used as a replacement of a serial console for the most cases. See gdb(4) for detail. (For i386, you can even take crash dump over FireWire.) JFYI, /\ Hidetoshi Shimokawa \/ simokawa@sat.t.u-tokyo.ac.jp PGP public key: http://www.sat.t.u-tokyo.ac.jp/~simokawa/pgp.html
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