Date: Sun, 25 Feb 1996 18:06:39 -0500 (EST) From: "Marc G. Fournier" <scrappy@ki.net> To: current@freebsd.org Subject: vm_map_insert panic, but can't get core dump to analyze... Message-ID: <Pine.BSF.3.91.960225174907.26081A-100000@ki.net>
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Hi... I'm trying to get my 486 up to -current from -stable, and due to a bug in vm_map_insert, can't seem to do it...it causes a panic. The stable kernel, now, has been running 9 days straight, no problems, whereas, the -current kernel I'm lucky to keep going for over 6hrs. I've performed a diff between the -stable and -current vm_map.c file, and there are substantial changes, which I expected since the VM code was totally "revamped". I have put in a problem report for it, but for some reason I can't seem to get a core dump out of the machine, so can't send a "proper" report in...only that which I can get out of ddb. I have the appropriate settings in /etc/sysconfig set: dumpdev=/dev/sd0b # Set to YES if you want kernel crashdumps to be saved for debugging savecore=YES I have the kernel compiled with DUMP and DDB enabled: options DODUMP options DDB And /var/crash exists, and has lots of disk space available: ki# df /var/crash Filesystem 1K-blocks Used Avail Capacity Mounted on /dev/sd0s1f 100398 51334 41032 56% /var ki# ls -lt /var/crash total 2 -rw-rw-r-- 1 root wheel 5 Nov 16 04:59 minfree The only thing I can think about is that since its a VM panic, it can't save the core to /dev/sd0b, and therefore, I can't get a core file out of it. Is there anything else I can do to debug this problem? If it wasn't for the fact that -stable is, in fact, stable on this machine, my first idea would be hardware, so my second idea has to be somewhere in the kernel code itself... And, the last changes to vm_map.c was on the 11th of Febuary, before my last kernel attempt, so there have been no changes in vm_map.c that would entice me to try a new kernel... Recommendations? Marc G. Fournier | POP Mail Telnet Acct DNS Hosting System | WWW Services Database Services | Knowledge, Administrator | | Information and scrappy@ki.net | WWW: http://www.ki.net | Communications, Inc
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