mount of ext2fs volume stuck in "D+" state (disk uninterruptible wait)

[Joe Peterson]

Kris Kennaway wrote:
> Joe Peterson wrote:
>> I just tried (under FreeBSD 7.0-RC1) to mount an ext2fs volume - I've
>> mounted it before with no trouble on this same FreeBSD version.  This
>> time, mount appeared to hang.  I noticed that I can see the contents of
>> the volume under the mount point, so the mount seemed to "work", but the
>> process is stuff.  "ps" shows:
>>
>> root   1307  0.0  0.0  3156   792  p6  D+    5:21PM   0:00.00 mount
>> /mnt/linux-home
>>
>> The "ps" man page says that "D" means: "Marks a process in disk (or
>> other short term, uninterruptible) wait."
>>
>> Is there any way I can investigate what is going on?  I cannot umount
>> (device busy) or break out of the mount command...
> 
> http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug.html

But unfortunately I do not have KDB and DDB compiled into the kernel.
And, obviously, if I reboot, I will lose this opportunity.  I suspect
this to be an intermittent thing.  Is there anything I can extract while
the system is running that would be useful?

	Thanks, Joe