On Tue, Apr 05, 2016 at 05:38:32AM -0700, Christoph Hellwig wrote: > On Thu, Mar 31, 2016 at 02:19:12PM -0600, Jon Derrick wrote: > > In 4.6, enabling io polling in direct-io was switched to a per-io flag. > > This had an unintended result of giving a significant difference when > > doing benchmarks between 4.5 and 4.6, using fio's sync engine. > > Only if you manually enabled polling beforehand. I really don't see > how this is going to be useful for actual applications vs benchmarks, > so I'll need more convincing arguments. I think it's more about providing opt-in control to make the low-latency benefit reachable to users with existing programs. -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
