Date: Sat, 20 Aug 2005 10:48:34 -0400 From: Jason Morgan <jwm-freebsd@sentinelchicken.net> To: freebsd-stable@freebsd.org Subject: Re: FreeBSD 4.x crash system Message-ID: <20050820144834.GH743@sentinelchicken.net> In-Reply-To: <1573.192.168.1.21.1124541335.squirrel@192.168.1.21> References: <1573.192.168.1.21.1124541335.squirrel@192.168.1.21>
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On Sat, Aug 20, 2005 at 02:35:35PM +0200, Vincent Blondel wrote: > > Hi, > > System : FreeBSD 4.10-RELEASE-p2 > Host : Tyan Thunder K7X (S2468GN) > Cpu : 2 * Athlon MP 1800+ > Memory : 2 * 512Mb DDR-266 Memory > Adaptec 5400s SCSI RAID Controller > > I got for the second time, this week, a system crash with my FreeBSD server. You > can find below what I get on the screen but I don't understand all what it means. > I just see there was a problem with the process imapd ( previous time I got a > segmentation fault with apache 1.3 ) > > fault code = supervisor read, page not present > instruction pointer = 0x8:0xc02a3e90 > stack pointer = 0x10:0xe3b22a10 > frame pointer = 0x10:0xe3b22a14 > code segment = base 0x10, limit 0xfffff, type 0x1b > = DPL 0, press 1, def32 1, gran 1 > processor eflags = interrupt enabled, resume, IOPL = 0 > current process = 76856 (imapd) > interrupt mask = none <- SMP: xxx > kernel : type 12 trap, code=0 > db> > > I also remarked the keyboard focused on a process with 'db>'. What is this and what can > I do with it. I tried 'exit' 'quit' 'bye' but all these statements don't do anything so I > just pressed on button 'Reset' and rebooted the machine. > > Before starting the machine I checked the hardware by running 'memtest' during 6 hours and > no errors were found. This seems to point the problem with my FreeBSD installation better > than a hardware ( example memory ) error. > > I also don't pretend my system is compiled with the best method. I remember ( this is > now a log time ago ... ) I compiled lot of things with '-O2 -pipe' ( except the > kernel with '-O -pipe' ) but is this safe enough for an SMP system with FreeBSD 4.x ??? > > So can somebody explain me what does this mean and also if I have to configure > something to make a dump file when I get an error. I suppose this will be > easier to investigate the problem if I still have other system crash. > > Regards > Vincent. Here's how to get a crash dump. http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug.html In the mean time, I suggest recompiling world and kernel without -O2 and -O. Cheers, Jason
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