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Date:      Wed, 05 Jul 2000 00:11:08 +1000
From:      Stephen McKay <mckay@thehub.com.au>
To:        Stefan Esser <se@freebsd.org>
Cc:        Stephen McKay <mckay@thehub.com.au>, Alan Edmonds <aedmonds@digitalconvergence.com>, Bill Paul <wpaul@freebsd.org>, Chris Wasser <cwasser@v-wave.com>, freebsd-stable@freebsd.org
Subject:   Re: Strangeness with 4.0-S 
Message-ID:  <200007041411.AAA18590@dungeon.home>
In-Reply-To: <20000704140131.A1734@StefanEsser.FreeBSD.org> from Stefan Esser at "Tue, 04 Jul 2000 14:01:31 %2B0200"
References:  <200007030749.RAA13446@dungeon.home> <20000704140131.A1734@StefanEsser.FreeBSD.org>

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On Tuesday, 4th July 2000, Stefan Esser wrote:

>It is just not necessary to disable the optimization, since it 
>will cost a few retransmissions (and the driver will know that 
>the frame was not successfully sent and can retry immediately 
>with the modified buffer setting).

On my systems (multiple affected by this sort of thing) I get a long
and annoying pause as the card resets and renegotiates speed and half/full
duplex with the switch.  It is very noticeable and quite frankly not
acceptable.  I had to hack out all the clever auto fallback because
otherwise I would have thrown my computer out the window.

That's why I think that setting the default ever-so-slightly slower, but
without big hiccups, is better than the current situation.  Of course, add
a "maximum performance" switch if you want, but no regular user will find
fault with a default of store and forward.

Stephen.


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