On Sat, Jun 21, 2014 at 12:52:22AM +0000, Elliott, Robert (Server Storage) wrote: > Some of those context switches might be from scsi_end_request(), > which always schedules the scsi_requeue_run_queue() function via the > requeue_work workqueue for scsi-mq. That causes lots of context > switches from a busy application thread (e.g., fio) to a > kworker thread.
Jens has been prodding me to fix this up, I'll send a patch soon that avoids the workqueue unless we need to kick other queues and thus walk the list of LUNs. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
