Date: Mon, 31 Oct 2005 02:58:50 -0800 (PST) From: kamal kc <kamal_ckk@yahoo.com> To: freebsd-questions@freebsd.org Cc: freebsd <freebsd-hackers@freebsd.org> Subject: kernel crash dump could not be obtained Message-ID: <20051031105850.97235.qmail@web35705.mail.mud.yahoo.com>
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dear all, i have to make modifictions to the kernel and i have been encountering kernel crashes all the time. the kernel panics with messages starting with vm_fault: and then crashes and reboots. i guess i have done incorrect memory operations and i want to know where i went wrong. so i thought of obtaining the crash dump. i went through the developers guide. and i added the following lines on the /etc/rc.conf --- dumpdev="/dev/ad0s1b" dumpdir="/var/crash" savecore_flags="" -- the /etc/fstab file is Device Mountpoint FStype Options Dump Pass# /dev/ad0s1b none swap sw 0 0 /dev/ad0s1a / ufs rw 1 1 /dev/ad0s1e /tmp ufs rw 2 2 /dev/ad0s1f /usr ufs rw 2 2 /dev/ad0s1d /var ufs rw 2 2 /dev/acd0 /cdrom cd9660 ro,noauto 0 0 swap partition is /dev/ad0s1b swapinfo gives the output:-- Device 1K-blocks Used Avail Capacity /dev/ad0s1b 495048 0 495048 0% My memory size according to dmesg is -- real memory = 266600448 (254 MB) avail memory = 251232256 (239 MB) -- Now when the kernel crashes it prints the message writing dump 240MB but rebooting does not show any crash dump file on /var/crash. please help kamal __________________________________ Start your day with Yahoo! - Make it your home page! http://www.yahoo.com/r/hs
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