On Thu, Nov 18, 2010 at 08:25:23PM -0500, Ted Ts'o wrote: > On Thu, Nov 18, 2010 at 08:05:56PM +0000, Grant Edwards wrote: > > On 2010-11-18, Michael Haardt <michael@xxxxxxxx> wrote: > > >> > I miss a way to disable the transmit FIFO. > > >> > > >> From userspace or from within a kernel driver? > > > > > > From userspace. > > > > $ man setserial > > Specifically, if you use setserial to configure a serial port so that > its UART is a 16450, it will force the transmit FIFO to be unused. You can also leave the UART type as 16[56]50 and set the tx fifo threshold to 1. That way you're only taking half the hit on interrupt overhead. -- Grant -- 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
