https://bugzilla.kernel.org/show_bug.cgi?id=25832 --- Comment #61 from rocko <rockorequin@xxxxxxxxxxx> 2011-04-22 10:37:37 --- I can reliably reproduce it with the following, running in Ubuntu (11.04 at the moment, but 10.10 works as well): 1. I insert a USB key formatted with ext4. 2. I run this simple script, passing the id that shows up in /sys/bus/usb/drivers/usb-storage for the USB key as the argument, eg 2-2:1.0: #!/bin/bash SLEEP=3 function list { if [ -e "$1" ]; then echo $1 fi } cd /sys/bus/usb/drivers/usb-storage if [ "$1" == "" ] || [ "$2" != "" ]; then echo "Usage: $0 usb device" echo "With one of these: " for file in 1* ; do list $file; done for file in 2* ; do list $file; done exit 1 fi echo 8 > /proc/sys/kernel/printk count=1 while true; do echo -n $1 >unbind echo $count sleep $SLEEP echo -n $1 >bind sleep $SLEEP ((count=count+1)) done I'm making it sleep 3 seconds between unbind/bind events because that gives Ubuntu plenty of time to mount the drive after the bind. When it oopses, it typically oopses within a few seconds of the unbind event (I'd say in less than 10 seconds and often immediately). For me it normally will oops inside 10 bind/unbinds, but 2.6.39-rc4 took more like 20 to 30 goes when I tried it this morning). I'll try again sending the output to another PC, but I'm pretty sure last time I tried that the ssh session crashed before it could dump the stack trace, just as the tty console usually crashes before it finishes dumping. When I get time I'll try some variations as well like making it sync and sleep before the unbind. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
