Xen users - May 2013 - blktap stop every 10 seconds and the performance suffers

Hi all,

I implement a network store based on blktap, a IO consuming 100
seconds, how erver tapdisk stops every 10 seconds, as a result
previous''s completion will be done until 10 seconds later.  This makes
the performance bad.  I am using blktap wrong OR the situation is
expected?

Thanks,
Yongqiang