On Thu, Jul 28, 2016 at 02:15:11PM +0530, Bhaktipriya Shridhar wrote: > The workqueue has a single work item(&lvs->rh_work) and hence > doesn't require ordering. Also, it is not being used on a memory > reclaim path. Hence, the singlethreaded workqueue has been replaced > with the use of system_wq. > > System workqueues have been able to handle high level of concurrency > for a long time now and hence it's not required to have a singlethreaded > workqueue just to gain concurrency. Unlike a dedicated per-cpu workqueue > created with create_singlethread_workqueue(), system_wq allows multiple > work items to overlap executions even on the same CPU; however, a > per-cpu workqueue doesn't have any CPU locality or global ordering > guarantee unless the target CPU is explicitly specified and thus the > increase of local concurrency shouldn't make any difference. > > The work item has been flushed in lvs_rh_disconnect() to ensure that > there are no pending tasks while disconnecting the driver. > > Signed-off-by: Bhaktipriya Shridhar <[email protected]>
Acked-by: Tejun Heo <[email protected]> Thanks. -- tejun
