usb/125450: Removing USB flash card while being accessed causes kernel panic

[Toomas Aas]

Monday 14 July 2008 19:18:51 kirjutas Simson Garfinkel:

> Unfortunately, I can't get the stack trace because the system is not
> performing the crash dump. I've never done a FreeBSD crash dump. I
> tried following the directions, but no luck.
>
> I have also tried configuring a dumpdev in the /etc/rc.conf file:
>
> 03:27 PM copy:/home/simsong# cat /etc/rc.conf
> hostname="copy"
> ifconfig_em0="DHCP"
> keymap="us.pc-ctrl"
> keyrate="fast"
> linux_enable="YES"
> moused_enable="YES"
> sshd_enable="YES"
> dumpdev=/dev/ad0s1a

dumpdev should be set to swap device - "/dev/ad0s1b" in your case. But 
actually you *should* be able to leave it undefined, in which case "AUTO" is 
used. 

I am also trying to create a pr regarding panic when connecting and 
disconnecting an umass device, and I also can't get a crash dump. Don't know 
why...

> 03:28 PM copy:/home/simsong# cat /etc/fstab
> # 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
> /dev/acd1		/cdrom1		cd9660	ro,noauto	0	0
> /dev/ad8s1d		/big		ufs	rw		3	3
> 03:29 PM copy:/home/simsong#

--
Toomas Aas