Date: Tue, 20 Jul 1999 11:49:50 -0700 (PDT) From: Matthew Dillon <dillon@apollo.backplane.com> To: "Steven G. Kargl" <kargl@troutmask.apl.washington.edu> Cc: phk@critter.freebsd.dk (Poul-Henning Kamp), freebsd-current@FreeBSD.ORG Subject: Re: is dumpon/savecore broken? Message-ID: <199907201849.LAA06381@apollo.backplane.com> References: <199907201809.LAA04373@troutmask.apl.washington.edu>
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:> > dumpon: crash dumps to /dev/da0s1b (4, 131073)
:> > checking for core dump...savecore: can't find device 13/131073
:>
:> >It seems that the the major device number is reset from 4 to 13.
:>
:> Yes, all dev_t's which make it out of the kernel have cmajor
:> numbers now.
:>
:> Try this change to savecore:
:>
:> /ddname = find_dev/s/BLK/CHR/
:>
:
:Thanks, Poul.
:
:I forgot to mention that this is after a "make world" and new kernel
:from today (1000 PST).
:
:--
:Steve
A checklist for people who want kernel cores:
* make sure that dumpdev is set to point to your swap partition
in your /etc/rc.conf
* make sure your swap partition is large enough to hold the crash
dump. If you have 256MB of ram, your swap partition must be
at least 256MB in size.
* make sure /var/crash has sufficient space to hold the dump
(note: /var/crash *can* be a softlink to a directory in some
other partition if /var does not have sufficient space)
/var/crash must nominally have sufficient space to hold the crash
dump (a file of the same size as the amount of memory you have),
*and* the kernel image. Normally you give it a lot more space so
you store several crash dumps in it at once.
-Matt
Matthew Dillon
<dillon@backplane.com>
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