On Fri, Jan 21, 2011 at 12:26:54PM -0600, Eric Sandeen wrote:

ext4 has a data corruption case when doing non-block-aligned
asynchronous direct IO into a sparse file, as demonstrated
by xfstest 240.

Hey Eric,

One question about this patch.  You are currently using a hashed array
of size 37 for the waitqueue; what about using a similarly sized
hashed array for the aio_mutex?  We only take it for unaligned
mutexes, and I'm trying to work on reducing the size of ext4 inode,
since it gets rather large in the inode cache....

	     	 	   	   	    	- Ted