On Thu, Jan 10, 2019 at 04:19:53PM +0100, Oleksij Rempel wrote: > > My gut feel is that if somebody still cares deeply about serial line > > latency, they should look at trying to see if they can do some of the > > work directly without the bounce to the workqueue. We use workqueues > > for a reason, but it's possible that some of it could be avoided at > > least in special cases... And yours sounds like a special case. > > It is for industrial low latency RS-422 based application. The loopback > test is just easy way to test/reproduce it without additional hardware. > > What is good, mainlineable way to implement it?
What is the real problem your systems are having? Are they serial-port limited? Is latency a big issue? Trying to tune for a fake workload isn't the best way to solve anything :) thanks, greg k-h
