Date: Wed, 25 Jun 2008 14:24:58 +0000 From: Pietro Cerutti <gahr@FreeBSD.org> To: Toomas Aas <toomas.aas@raad.tartu.ee>, User Questions <freebsd-questions@freebsd.org> Subject: Re: Cannot get kernel core dump Message-ID: <4862553A.30903@FreeBSD.org> In-Reply-To: <200806251711.56906.toomas.aas@raad.tartu.ee> References: <200806251711.56906.toomas.aas@raad.tartu.ee>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Toomas Aas wrote: | Hello! | | 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 | times): | dumpdev="/dev/ad0s1b" | dumpdir="/home/crash" | | 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 | hw.physmem: 527863808 | | bsd# swapinfo | 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 | log says | 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 | effect. | | Are there known conditions under which the core dump really isn't recorded, or | am I simply missing something obvious? Yes, if the panic occurs before the filesystem supposed to contain the crash dumps is mounted. Is it the case? | | -- | Toomas | _______________________________________________ | freebsd-questions@freebsd.org mailing list | http://lists.freebsd.org/mailman/listinfo/freebsd-questions | To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" - -- Pietro Cerutti gahr@FreeBSD.org PGP Public Key: http://gahr.ch/pgp -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (FreeBSD) iEYEAREKAAYFAkhiVTgACgkQwMJqmJVx9454AwCgowIDacy0X33iBwbC0QRVCYjw zGcAnig8zjnlrq1njlwqO7pJOGIyOV3O =4wCh -----END PGP SIGNATURE-----
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