Subject: Re: How to avoid serial port buffer overruns?
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Russell King <rmk+lkml@arm.linux.org.uk>
Cc: Paul Fulghum <paulkf@microgate.com>, Lee Revell <rlrevell@joe-job.com>,
       Raphael Hertzog <hertzog@debian.org>,
       Linux Kernel ML <linux-kernel@vger.kernel.org>
In-Reply-To: <20060817092811.GA28474@flint.arm.linux.org.uk>
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Date: Thu, 17 Aug 2006 12:57:12 +0100
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Ar Iau, 2006-08-17 am 10:28 +0100, ysgrifennodd Russell King:
> On Thu, Aug 17, 2006 at 10:20:46AM +0100, Alan Cox wrote:
> > Ar Iau, 2006-08-17 am 00:10 +0100, ysgrifennodd Russell King:
> > > MIDI uses its own driver - sound/drivers/serial-u16550.c.  My guess
> > 
> > How peculiar
> > 
> > > is there's something in the system starving interrupt servicing.
> > > Serial is very sensitive to that, and increases in other system
> > > latencies tends to have an adverse impact on serial.
> > 
> > I see no support for the 16650 specific bits in the driver, so that
> > alone may be a problem ?
> 
> Huh?  16550 not 16650.  Did you miss this?

Raphael said "I forgot to mention the kind of UART in my mail but it is
a 16650A"
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