All of lore.kernel.org
 help / color / mirror / Atom feed
From: Lee Revell <rlrevell@joe-job.com>
To: Russell King <rmk+lkml@arm.linux.org.uk>
Cc: Paul Fulghum <paulkf@microgate.com>,
	Raphael Hertzog <hertzog@debian.org>,
	Linux Kernel ML <linux-kernel@vger.kernel.org>
Subject: Re: How to avoid serial port buffer overruns?
Date: Wed, 16 Aug 2006 19:15:06 -0400	[thread overview]
Message-ID: <1155770107.8796.14.camel@mindpipe> (raw)
In-Reply-To: <20060816231033.GB12407@flint.arm.linux.org.uk>

On Thu, 2006-08-17 at 00:10 +0100, Russell King wrote:
> On Wed, Aug 16, 2006 at 05:24:26PM -0500, Paul Fulghum wrote:
> > 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?
> 
> MIDI uses its own driver - sound/drivers/serial-u16550.c.  My guess
> 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.
> 

Thanks.

Have you seen many other reports of serial working reliably in 2.4 but
not in 2.6?  Right now this is the only clue I have to go on...

Lee


  reply	other threads:[~2006-08-16 23:14 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-08-16 10:45 How to avoid serial port buffer overruns? Raphael Hertzog
2006-08-16 14:31 ` Lennart Sorensen
2006-08-16 14:57   ` Raphael Hertzog
2006-08-16 18:44 ` Lee Revell
2006-08-16 19:23   ` Paul Fulghum
2006-08-16 21:12     ` Lee Revell
2006-08-16 22:24       ` Paul Fulghum
2006-08-16 23:10         ` Russell King
2006-08-16 23:15           ` Lee Revell [this message]
2006-08-16 23:19             ` Russell King
2006-08-16 23:28               ` Lee Revell
2006-08-17  0:15                 ` R: " Giampaolo Tomassoni
2006-08-18  8:48                 ` Giampaolo Tomassoni
2006-08-18 17:00                   ` Lee Revell
2006-08-18 17:04                     ` Russell King
2006-08-18 17:30                       ` Lee Revell
2006-08-18 18:34                         ` Russell King
2006-08-18 18:52                           ` Lee Revell
2006-08-18 19:01                             ` Russell King
2006-08-18 19:07                               ` Russell King
2006-08-18 19:09                               ` Lee Revell
2006-08-17  9:20           ` Alan Cox
2006-08-17  9:28             ` Russell King
2006-08-17 11:57               ` Alan Cox
2006-08-17 13:29                 ` Paul Fulghum
2006-08-17 15:48                 ` Raphael Hertzog
2006-08-17 16:10         ` Raphael Hertzog
2006-08-17 16:40           ` Paul Fulghum
2006-08-18 19:31           ` Lee Revell
2006-08-23 12:45             ` Raphael Hertzog
     [not found] <fa.AByCsBI8k71hMVzCyQVimrLiDU4@ifi.uio.no>
2006-08-16 14:35 ` Robert Hancock
2006-08-16 14:42   ` Erik Mouw

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1155770107.8796.14.camel@mindpipe \
    --to=rlrevell@joe-job.com \
    --cc=hertzog@debian.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=paulkf@microgate.com \
    --cc=rmk+lkml@arm.linux.org.uk \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.