Hello, On Wed, Dec 13, 2017 at 11:05:11AM +0800, jianchao.wang wrote: > Just don't quite understand the strict definition of "generation" you said. > A allocation->free cycle is a generation ? or a idle->in-flight cycle is a > generation? The idle->in-flight cycle could include the requeue case as above. > Can you clarify this?
So, a request is * IN_FLIGHT, if it can be completed by the lower level driver * COMPLETE, if the lower level driver indicated completion but block layer is still processing. * IDLE, if neither of the above two. and generation is bumped up on IDLE -> IN_FLIGHT to distinguish different IN_FLIGHT instances. Thanks. -- tejun
