lkml.org 
[lkml]   [2006]   [Aug]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: How to avoid serial port buffer overruns?
From
Date
On Wed, 2006-08-16 at 17:12 -0400, Lee Revell wrote:
> 2.6.15 and 2.6.16. Here is the .config:

Alan's rework of the receive tty buffering went
into 2.6.16 and cured some problems, but clearly not yours.
Some more adjustments are in 2.6.18-rc4, so that
would be interesting to try for diagnosing this.

I was wondering if the problem was interrupt latency,
the tty receive buffering, or something totally different.
I don't know if your problem and Raphael's are caused
by the same mechanism. I would still like to know which
kernel versions he has tried.

Does the MIDI device using the standard N_TTY line discipline?
Are you using the low_latency flag on the serial device?
What type of UART has been tested (16550? other?)
Are you seeing overruns or just lost data?

Thanks,
Paul






-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-08-17 00:27    [W:0.079 / U:0.204 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site