Date: Fri, 23 Nov 2001 11:59:26 +0200 From: Giorgos Keramidas <charon@labs.gr> To: Anthony Atkielski <anthony@atkielski.com> Cc: questions@FreeBSD.ORG Subject: Re: home pc use Message-ID: <20011123095926.GC9269@hades.hell.gr> In-Reply-To: <040d01c173b6$1738e010$0a00000a@atkielski.com> References: <15355.2770.644343.846234@guru.mired.org> <01e201c17234$24bc2360$0a00000a@atkielski.com> <20011122200153.GB498@hades.hell.gr> <040d01c173b6$1738e010$0a00000a@atkielski.com>
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On 2001-11-23 01:30:39, Anthony Atkielski wrote:
> Thanks. Looks like no dump was saved in my mystery case. I guess it will
> remain a mystery. As long as it doesn't happen again, I don't care.
A dump is not generated is a `dumpdev' is not defined in rc.conf
before the crash happens. The actual code in the kernel that checks
is very easy to locate. Grepping for `dumpdev' in /usr/src/sys/kern
gives:
% grep -l dumpdev *
kern_shutdown.c
And then a quick glance at kern_shutdown, reveals:
486 static void
487 dumpsys(void)
488 {
...
494 if (dumpdev == NODEV)
495 return;
The lines 494-495 are actually very easy to understand, even without
me being a kernel hacker of some sort.
I love having the source :)
Makes me feel so much better.
-giorgos
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