[ubuntu] Cannot generate crash dump after copy files into ocfs2 filesystem.

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http://ubuntuforums.org – Hi all: I recently days, we are running ocfs2 on our network block device driver. But I encounter 1 issue that when I copy files into ocfs2 filesystem, the linux will crash when copying files. This issue won't happens when I using ext3. For debug this issue, I have installed linux-crashdump and using echo c > /proc/sysrq-trigger. After reboot, I can see vmcore and using this file for debugging. I also embed BUG_ON(1) on my code, it also works for generate crash dump. But when I using ocfs2, ubuntu won't generate crash dump after reboot. My environment: Ubuntu 12.04 LTS OCFS2: 1.6.3- (Hardware)