On Fri, Jul 30, 2010 at 04:46:12PM +0400, Vladislav Bolkhovitin wrote: > I supposed, with write back cache you did the queue drain after > request(s) with ordered requirements, correct? Did you also do the queue > drain in the same places with write through caching? Using the queue drains in both cases. I can only imagine keeping the queue drained over the cache flush instead of just a few small I/Os has nasty side effects. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html