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Date: Mon, 8 Jul 2002 19:41:47 -0500 (CDT)
From: Mike Silbersack <silby@silby.com>
To: David Greenman-Lawrence <dg@root.com>
Cc: Peter Wemm <peter@wemm.org>, Luigi Rizzo <luigi@FreeBSD.org>,
	Don Lewis <dl-freebsd@catspoiler.org>, <cvs-committers@FreeBSD.org>,
	<cvs-all@FreeBSD.org>
Subject: Re: cvs commit: src/sys/dev/fxp if_fxp.c
In-Reply-To: <20020708171508.E71311@nexus.root.com>
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On Mon, 8 Jul 2002, David Greenman-Lawrence wrote:

>    I suspect that Luigi doesn't understand how the fxp driver transmit side
> works, especially in the way that transmit interrupts are done. Transmit
> interrupts are only generated as a way of garbage collection when there
> are no more descriptors available. This is an important optimization and
> is a fundamental difference from the way most other drivers work.
>    In other words, transmit interrupts don't happen for every packet (or
> even set of packets) like I think Luigi is expecting.
>
> -DG

However, the descriptors will be cleaned up once per second in any case,
correct?

If that is true, then the change only needs the slight tweak I posted a
few hours ago, but will otherwise work correctly.

Mike "Silby" Silbersack


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