On Sat, Jun 15, 2013 at 10:04:26AM -0400, Peter Hurley wrote: > Byte-by-byte echo output is painfully slow, requiring a lock/unlock > cycle for every input byte. > > Instead, perform the echo output in blocks of 256 characters, and > at least once per flip buffer receive. Enough space is reserved in > the echo buffer to guarantee a full block can be saved without > overrunning the echo output. Overrun is prevented by discarding > the oldest echoes until enough space exists in the echo buffer > to receive at least a full block of new echoes. I'm a bit worried about this, I wonder if anything is expecting the echos to not come in "bursts" like this, but I really can't think of why they would want that. So let's apply it and see what breaks! :) thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
