Possible problems with file- and memory-backed vdev in ZFS

[the_mix_room at hotmail.com]

Dear list, 

I have been experiencing possible problems with file-backed vdevs in ZFS. 
I was playing around with them for lack of proper drives, trying to get aquainted with the system. 

I noticed that my machine would hang when I deleted the file which was included in the pool

# mkfile file{1,2,3,4,5}
# zpool create tank raidz2 file{1,2,3,4,5}
# zpool scrub tank -> OK
# rm file1
# zpool scrub tank -> FAILURE

This does not occur then one of the files is replaced with a partition on a USB-drive. 

I have posted more complete information under forums.freebsd.org 

http://forums.freebsd.org/showthread.php?t=13619

Would appreciate if someone could point me in the direction to proceed, whether to post PR or what to do. 

Best regards, 
 		 	   		  
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