FreeBSD 7.2 savecore panic

[Bogdan Webb]

Hello.
I've got a small issue with my bsd box... I'm a new BSD user and please
accept my deepest apologies if i have rushed to use the mailing lists to
shout, what may be a silly issue. During the 3 moths the server that i
manage had 2 unexpected reboots after some ports were about to be installed.
The first time i wasn't paying much attention to the process and can't tell
exactly what caused the panic (it was certainly a port install related) but
i've paid close attention to this 2nd time. The server runs FreeBSD
7.2-RELEASE #0 on a amd64 arch and it cracked when i tried to install
portmanager from the /usr/ports/ports-mgmt/portmanager tree and using the
basic 'make install clean' command. Previously i've made the steps of
updating the portsnap collection in order to keep my box up2date. Out of
nowhere bsd crashed and using google i've managed to get some info about
crash logs:
./messages:Oct 20 00:13:25 pgn savecore: reboot after panic: page fault

/var/crash/info.0
Dump header from device /dev/ad10s1b
  Architecture: amd64
  Architecture Version: 2
  Dump Length: 426561536B (406 MB)
  Blocksize: 512
  Dumptime: Thu Sep 10 18:36:20 2009
  Hostname: pvp.ro
  Magic: FreeBSD Kernel Dump
  Version String: FreeBSD 7.2-RELEASE #0: Fri May  1 07:18:07 UTC 2009
    root at driscoll.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC
  Panic String: page fault
  Dump Parity: 2499253002
  Bounds: 0
  Dump Status: good


pgn# uname -a
FreeBSD pgn.ro 7.2-RELEASE FreeBSD 7.2-RELEASE #0: Fri May  1 07:18:07 UTC
2009     root at driscoll.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  amd64

saw some other topic related to issues like this and they pointed out
tinkering the
rc.conf:dumpdev="AUTO"
rc.conf:savecore_flags=""
But if i would prolly knew what i'm to do i wouldn't write this long dumb
help request :)

What's wrong with my bsd box (witch i'm in love so much now) and how can i
prevent it from panicking