> I don't understand why the low_latency flag even exists when setting > it apparently breaks most all of the serial drivers. Mostly history. I'd not realised random users could fiddle with it - they shouldn't be able to do that so that wants fixing. Historically it made sense as with a 100Hz clock some algorithms with drivers that delayed stuff a lot got really slow (eg non windowed versions of firmware download protocols, kermit, xmodem etc) Nowdays the kernel is a bit more sophisticated and we should possibly re-arrange it so that it selects different workqueues or similar - low_latency meaning 'use a private hard rt work queue' perhaps. Or indeed possibly making ttys use threaded IRQs -- 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
