On Fri, Dec 12, 2008 at 09:23:10AM +0100, Jens Axboe wrote: > aio is only async with O_DIRECT, with buffered IO it's sync.
That's very bad, because aio is as needed for O_DIRECT as for buffered read seeking workloads that otherwise have zero chance to fill the I/O pipe... (well unless one is threading in userland which is obviously less efficient than what aio could achieve in kernel space, even without taking cfq screwed bucketing into account). -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
