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Date: Sat, 28 Jul 2007 09:41:20 -0700
From: "Ray Lee" <ray-lk@madrabbit.org>
To: "Lee Howard" <faxguy@howardsilvan.com>
Subject: Re: serial flow control appears broken
Cc: "Paul Fulghum" <paulkf@microgate.com>, "Tilman Schmidt" <tilman@imap.cc>,
       "Alan Cox" <alan@lxorguk.ukuu.org.uk>,
       "Robert Hancock" <hancockr@shaw.ca>, linux-serial@vger.kernel.org,
       tytso@mit.edu, rmk@arm.linux.org.uk, linux-kernel@vger.kernel.org
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On 7/27/07, Lee Howard <faxguy@howardsilvan.com> wrote:
> Curiously, the session at 38400 bps that skipped 858 bytes... coincided,
> not just in sequence but also in precice timing within the session, with
> a small but noticeable disk load that I caused by grepping through a
> hundred session logs.  (I can't reproduce it easily, though, because of
> disk caching.)

`echo 1 > /proc/sys/vm/drop_caches` will clear out most (all?) of what
the kernel has cached from the drive. It's there just for this kind of
repeatability of tests...

Ray