From: "C.Newport" <crn@netunix.com>
To: sparclinux@vger.kernel.org
Subject: Re: [PATCH] SunSAB console problems in 2.6.x
Date: Fri, 27 Aug 2004 23:34:12 +0000 [thread overview]
Message-ID: <200408280034.12701.crn@netunix.com> (raw)
In-Reply-To: <20040825233247.237c1fb1.davem@redhat.com>
On Friday 27 August 2004 11:29 pm, David S. Miller wrote:
> On Fri, 27 Aug 2004 05:30:42 -0500
>
> Ralph Mitchell <rmitchell@eds.com> wrote:
> > For the record, I found that 2.6.7-rc1 didn't drop every other
> > character, while 2.6.7-rc2 and above do.
>
> Good clue.
>
> Are all of you guys seeing this problem on uniprocessor?
> Ralph, Joshua?
FWIW, I saw this problem in a completely different non-linux context
a while ago. It is possible, if the code is tight enough, for modern fast
processors to overwrite the character in a USART transmit register
before the USART has moved it down the internal buffer.
Introducing a suitable delay fixed it.
next prev parent reply other threads:[~2004-08-27 23:34 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-26 6:32 [PATCH] SunSAB console problems in 2.6.x David S. Miller
2004-08-26 8:31 ` Ralph Mitchell
2004-08-26 13:23 ` Ben Collins
2004-08-26 17:01 ` Ben Collins
2004-08-26 18:05 ` Ralph Mitchell
2004-08-26 20:19 ` David S. Miller
2004-08-27 0:43 ` Joshua Kwan
2004-08-27 1:10 ` David S. Miller
2004-08-27 10:30 ` Ralph Mitchell
2004-08-27 19:19 ` David S. Miller
2004-08-27 22:29 ` David S. Miller
2004-08-27 23:24 ` Joshua Kwan
2004-08-27 23:24 ` David S. Miller
2004-08-27 23:25 ` David S. Miller
2004-08-27 23:34 ` C.Newport [this message]
2004-08-27 23:39 ` David S. Miller
2004-08-28 0:01 ` Joshua Kwan
2004-08-28 0:04 ` David S. Miller
2004-08-28 7:06 ` Ralph Mitchell
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