Re: [PATCH 04/11] Blackfin SPORT UART: fix overrun errors

[Alan Cox]

On Tue,  2 Jun 2009 03:11:33 -0400
Mike Frysinger <vapier@xxxxxxxxxx> wrote:

> From: Cliff Cai <cliff.cai@xxxxxxxxxx>
> 
> Push the ty_flip_buffer_push() call from the IRQ handler to a timer so as
> to improve performance and decrease likelihood of overruns.

This should have no effect on a modern kernel. There is 64K of queueing
between you and the ldisc nowdays. Furthermore unless you set
tty->low_latency the kernel already basically does this aggregation for
you as the buffer push queues stuff for the ldisc to wake up and process.

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