I'm trying to report a problem which involves kernel panic, but I cannot get a
core dump. The system is 7.0-STABLE from June 18th.
I've set the following in /etc/rc.conf (and of course rebooted, even several
The machine has 512 MB RAM and swap partition is also 512 MB, but according to
dumpon(8) this shouldn't be a problem, because hw.physmem is still somewhat
smaller than the swap partition:
bsd# sysctl hw.physmem
Device 1K-blocks Used Avail Capacity
/dev/ad0s1b 524288 0 524288 0%
/home partition, where I've created the crash directory, has 55 GB free space.
When the machine boots up, it dutifully reports:
kernel dumps on /dev/ad0s1b
Then I "do the thing" that causes the panic. System prints the panic message
and hangs. Only thing left to do is press the reset button. On next boot, the
savecore: no dumps found
When the system panics and prints the panic message, it doesn't say anything
about saving the coredump. I haven't had a kernel panic for a long time, but
I seem to remember that in the past there was some kind of message to that
Are there known conditions under which the core dump really isn't recorded, or
am I simply missing something obvious?
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