On 02/20/2013 04:42 AM, Dmitry Monakhov wrote:

Run  DIO, fallocate and truncate threads on a common file in parallel.
If race exist old dio request may rewrite blocks after it was allocated
to another file, we will catch that by verifying blocks content.

this patch known to catch deadlock for ext4
http://lists.openwall.net/linux-ext4/2012/09/06/3

Signed-off-by: Dmitry Monakhov <redacted>

Looks good.

Reviewed-by: Rich Johnston <redacted>